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Articles 1 - 30 of 41
Full-Text Articles in Entire DC Network
Self-Cleaning Biobr/Ag Photocatalytic Membrane For Membrane Regeneration Under Visible Light In Membrane Distillation, Jiaxin Guo, Dickson Y.S. Yan, Frank L.Y. Lam, Bhaskar Jyoti Deka, Xincong Lv
Self-Cleaning Biobr/Ag Photocatalytic Membrane For Membrane Regeneration Under Visible Light In Membrane Distillation, Jiaxin Guo, Dickson Y.S. Yan, Frank L.Y. Lam, Bhaskar Jyoti Deka, Xincong Lv
Faculty of Science & Technology (THEi)
In this study, an innovative electrospun photocatalyst self-cleaning BiOBr/Ag membrane is introduced for the MD treatment of dyeing wastewater coupled with post-MD UV and visible light exposure for fouled membrane regeneration. The E-BiOBr/Ag membrane was fabricated by successfully coating an electrospun membrane with BiOBr/Ag catalyst particles using electrospray technology, with the goal to achieve higher hydrophobicity and the reproducible property. Along with the E-BiOBr/Ag membrane, two commercial polyvinylidene difluoride (PVDF) and polytetrafluoroethylene (PTFE) membranes were tested for comparison. The fouling processes on all three membranes were monitored in real-time using optical coherence tomography (OCT). The coating of BiOBr/Ag particles on …
Investigation Of Factors Affecting The Gaseous And Particulate Matter Emissions From Diesel Vehicles, Bei Wang, Yik Sze Lau, Yuhan Huang, Bruce Organ, Shun Cheng Lee, Kin Fai Ho
Investigation Of Factors Affecting The Gaseous And Particulate Matter Emissions From Diesel Vehicles, Bei Wang, Yik Sze Lau, Yuhan Huang, Bruce Organ, Shun Cheng Lee, Kin Fai Ho
Faculty of Science & Technology (THEi)
© 2019, Springer Nature B.V. This study presents a detailed investigation of diesel vehicle emissions utilizing chassis dynamometer testing. The recruited vehicle fleet consists of 15 in-use diesel vehicles, spanning a wide range of emission standards, engine sizes, weight, model year, etc. The real-time emission concentrations of nitrogen oxides (NOx), total hydrocarbons (THC), carbon monoxide (CO) and carbon dioxide (CO2), and the mass of particulate matter (PM) collected on filters are measured and used to calculate the vehicle emission factors (EFs) under various driving conditions. Results show that in general EFs of NOx, CO, THC, and PM of the recruited …
Study On Microwave Sterilization Technology Of Humidifier In Central Air Conditioning System, Yang Lv, Guangyao Hu, Jingyi Liang, Xi Chen, Bin Chen, Tongke Zhao, Xiaoying Lu, Bin Wang, Wenjie Yuan, Yimin Li
Study On Microwave Sterilization Technology Of Humidifier In Central Air Conditioning System, Yang Lv, Guangyao Hu, Jingyi Liang, Xi Chen, Bin Chen, Tongke Zhao, Xiaoying Lu, Bin Wang, Wenjie Yuan, Yimin Li
Faculty of Science & Technology (THEi)
© 2019 The issue of fungal microbial contamination in central air conditioning systems is one of the main problems of biological pollution in building environment. In this study, through the basic experimental study of microwave sterilization under ideal conditions, considering the sterilization effect and energy consumption, the preliminary reference range of microwave sterilization effective temperature is 50°C–59 °C. Through the research of microwave sterilization experimental platform of humidifier in central air conditioning system, it is found that microwave sterilization has a slight influence on the air supply parameters of air conditioning system, and it can be considered under the operating …
Integrated Photocatalytic-Biological Treatment Of Triazine-Containing Pollutants, Cho Yin Chan, Ho Shing Chan, Po Keung Wong
Integrated Photocatalytic-Biological Treatment Of Triazine-Containing Pollutants, Cho Yin Chan, Ho Shing Chan, Po Keung Wong
Faculty of Science & Technology (THEi)
© 2019 Elsevier Ltd The degradation of triazine-containing pollutants including simazine, Irgarol® 1051 and Reactive Brilliant Red K-2G (K-2G) by photocatalytic treatment was investigated. The effects of titanium dioxide (TiO2) concentration, initial pH of reaction mixture, irradiation time and ultraviolet (UV) intensity on photocatalytic treatment efficiency were examined. Complete decolorization of K-2G was observed at 60 min photodegradation while only 15 min were required to completely degrade simazine and Irgarol® 1051 under respective optimized conditions. High-performance liquid chromatography (HPLC), gas chromatography/mass spectrometry (GC/MS) and ion chromatography (IC) were employed to identify the photocatalytic degradation intermediates and products. Dealkylated intermediates of …
Trace Elements And Polycyclic Aromatic Hydrocarbons In Road Gully Sediments From Different Land Uses, Hong Kong, K. L. Pun, Shuen Law, Gang Li
Trace Elements And Polycyclic Aromatic Hydrocarbons In Road Gully Sediments From Different Land Uses, Hong Kong, K. L. Pun, Shuen Law, Gang Li
Faculty of Science & Technology (THEi)
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Purpose: This study investigated the concentrations of cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), nickel (Ni), zinc (Zn), and polycyclic aromatic hydrocarbons (PAHs) in sediments collected from gully pots for road drainage in Hong Kong. The presence and intensity of anthropogenic contamination of road gully sediments were assessed. Identifications of potential sources of trace elements and PAHs were performed to help understand the situation for future control of pollution to the land and aquatic environments. Materials and methods: Gully sediment samples were collected from gully pots of 18 roads that …
Inclusive Sand-Shoeing Training Program For Students With And Without Intellectual Disabilities In Hong Kong, Peggy Hiu Nam Choi, Siu Yin Cheung
Inclusive Sand-Shoeing Training Program For Students With And Without Intellectual Disabilities In Hong Kong, Peggy Hiu Nam Choi, Siu Yin Cheung
Faculty of Design & Environment (THEi)
One of the sports for the Special Olympics is snow-shoeing. In Hong Kong training for this sport occurs in the sand and is called sand-shoeing. The purpose of this study was to evaluate a sandshoeing training program (STP) of the Special Olympics Hong Kong (SOHK). Two hundreds and thirty-two Grade 1 to 12 special school students with intellectual disabilities (ID), and 66 university students without ID participated in the STP. Three different types of survey were designed for students with ID, university students, and special school teachers. Descriptive data from the feedback of these three parties on the STP were …
Generation And Reactivity Of A One-Electron Oxidized Manganese(V) Imido Complex Bearing A Macrocyclic Tetraamido Ligand, Huatian Shi, Jianhui Xie Xie, William W. Y. Lam, Wai‐Lun Man, Chi‐Keung Mak, Shek‐Man Yiu, Hung Kay Lee, Tai‐Chu Lau
Generation And Reactivity Of A One-Electron Oxidized Manganese(V) Imido Complex Bearing A Macrocyclic Tetraamido Ligand, Huatian Shi, Jianhui Xie Xie, William W. Y. Lam, Wai‐Lun Man, Chi‐Keung Mak, Shek‐Man Yiu, Hung Kay Lee, Tai‐Chu Lau
Faculty of Science & Technology (THEi)
The synthesis and X‐ray structure of a new manganese(V) mesitylimido complex with a tetraamido macrocyclic ligand (TAML), [MnV(TAML)(N‐Mes)]− (1), are reported. Compound 1 is oxidized by [(p‐BrC6H4)3N]+.[SbCl6]− and the resulting MnVI species readily undergoes H‐atom transfer and nitrene transfer reactions.
Co-Designing Mobile Collection Points With Older Persons To Promote Green Attitudes And Practices In Hong Kong, Alex Pui Yuk King
Co-Designing Mobile Collection Points With Older Persons To Promote Green Attitudes And Practices In Hong Kong, Alex Pui Yuk King
Faculty of Design & Environment (THEi)
No abstract provided.
Improving The Energy Efficiency Of Petrochemical Plant Operations: A Measurement And Verification Case Study Using A Balanced Wave Optimizer, Eve Man Hin Chan, Kar-Kit Chu, Hin-Fung Chow, Chi-Wing Tsang, Danny Chi Kuen Ho, Shuk-Kei Ho
Improving The Energy Efficiency Of Petrochemical Plant Operations: A Measurement And Verification Case Study Using A Balanced Wave Optimizer, Eve Man Hin Chan, Kar-Kit Chu, Hin-Fung Chow, Chi-Wing Tsang, Danny Chi Kuen Ho, Shuk-Kei Ho
Faculty of Science & Technology (THEi)
The Chinese petrochemical industry is facing pressure to meet strict targets of energy consumption and carbon emission reductions. Water pumps are the primary equipment used in most chemical and agrochemical industries sectors since water is commonly used for cooling and heating purposes, but these pumps also consume a large amount of energy. Other uses of water pumps in these industries include producing steam for heating, preparing reaction media or absorptive reagents, rinsing products, and distilling. As for the electrical components of the water pump systems, current technologies of variable frequency drives and superconducting transmission lines are unable to increase the …
Tree Density And Diversity In Hong Kong’S Public Housing Estates: Fromprovision Injustice To Socio-Ecological Inclusiveness., Louis Shing Him Lee, C.Y. Jim, Allen Hao Zhang
Tree Density And Diversity In Hong Kong’S Public Housing Estates: Fromprovision Injustice To Socio-Ecological Inclusiveness., Louis Shing Him Lee, C.Y. Jim, Allen Hao Zhang
Faculty of Design & Environment (THEi)
Socio-economically underprivileged urban communities might suffer from restricted access to urban forests. Environmental injustice research on urban greenery in Asian cities is lacking. Public housing estates in Hong Kong, accommodating low-income households and over half of the 7.45 million population, were investigated for injustice in tree provision. Two clustering schemes used socio-economic and ecological characteristics to classify 93 estates. Factor analysis of 14 socio-economic variables identified four factors related to deprivation, namely ageing population, overcrowding, working poor with high academic qualifications, and marginalised language minorities. Principal component analysis of six ecological indices returned two components related to tree density and …
Tree Distribution, Morphology And Modelled Air Pollution In Urban Parks, Yang Xing, Peter Brimblecombe, Sifeng Wang, Allen Hao Zhang
Tree Distribution, Morphology And Modelled Air Pollution In Urban Parks, Yang Xing, Peter Brimblecombe, Sifeng Wang, Allen Hao Zhang
Faculty of Design & Environment (THEi)
Trees offer a range of ecosystem services and remain important in providing human benefits. However, emerging literature questions the long-accepted view of trees being able to improve air quality in urban parks. The aerodynamic effect of trees was identified as a major reason for the change of pollutant distribution in near-road parks, where trees can act as porous barriers and cause localised concentration increase. Although not yet fully developed, planting strategies aiming to mitigate the negative effect of vegetation on air quality should be encouraged in future park design. In this study, we explored the effect of tree planting design …
Species Diversity And Spatial Pattern Of Old And Precious Trees In Macau, Allen Hao Zhang, Po Ying Lai, Chi Yung Jim
Species Diversity And Spatial Pattern Of Old And Precious Trees In Macau, Allen Hao Zhang, Po Ying Lai, Chi Yung Jim
Faculty of Design & Environment (THEi)
The world's fast pace of urbanization has exerted profound pressure on urban trees. With over 400 years of urban history, Macau has developed an exceptionally high population density and ultra-compact mode, yet it permits survival of interesting and diverse heritage trees. These outstanding living remnants connote special values in history, ecology and botany. In conjunction with commemorative importance, they have been designated as Old and Precious Trees (OPT). This study evaluated the OPT with reference to: (a) species diversity and evenness; (b) spatial distribution; (c) tree dimensions, age and health; and (d) spatial differentiation of tree attributes by four districts …
Spatial Differentiation Of Heritage Trees In The Rapidly-Urbanizing City Of Shenzhen, China, Po Ying Lai, Cy Jim, Guang Da Tang, Wen Jun Hong, Hao Zhang
Spatial Differentiation Of Heritage Trees In The Rapidly-Urbanizing City Of Shenzhen, China, Po Ying Lai, Cy Jim, Guang Da Tang, Wen Jun Hong, Hao Zhang
Faculty of Design & Environment (THEi)
In China, heritage trees are actively surveyed and reported. Over 300 relevant published articles were reviewed to assess the contents, trends and geographical distributions of the investigations. The majority of the heritage trees studies in China were found in the eastern provinces and published within 2010–2014. Most studies reported surveys on all old trees. For studies focused on single species, Ginkgo (Ginkgo biloba) and Chinese Yew (Taxus chinensis) was most frequently reported. Unlike the champion tree registry in the US and other countries, the tree registry in China emphasized more on the tree age than the size. We then have …
Fuel Consumption And Emissions Performance Under Real Driving: Comparison Between Hybrid And Conventional Vehicles., Yuhan Huang, Surawski C. Nic, Organ Bruce, John L. Zhou, Oscar H.H Tang, Edward F.C. Chan
Fuel Consumption And Emissions Performance Under Real Driving: Comparison Between Hybrid And Conventional Vehicles., Yuhan Huang, Surawski C. Nic, Organ Bruce, John L. Zhou, Oscar H.H Tang, Edward F.C. Chan
Faculty of Science & Technology (THEi)
Hybrid electric vehicles (HEVs) are perceived to be more energy efficient and less polluting than conventional internal combustion engine (ICE) vehicles. However, increasing evidence has shown that real-driving emissions (RDE) could be much higher than laboratory type approval limits and the advantages of HEVs over their conventional ICE counterparts under real-driving conditions have not been studied extensively. Therefore, this study was conducted to evaluate the real-driving fuel consumption and pollutant emissions performance of HEVs against their conventional ICE counterparts. Two pairs of hybrid and conventional gasoline vehicles of the same model were tested simultaneously in a novel convoy mode using …
Study Of Synthesis Of Biodegradable Plastics From Alkaline Fermented Excessive Activated Sludge, Yaohui Liu, Chua Hong
Study Of Synthesis Of Biodegradable Plastics From Alkaline Fermented Excessive Activated Sludge, Yaohui Liu, Chua Hong
Faculty of Science & Technology (THEi)
The environmental problems associated with plastics have become increasingly severe in recent years. Technologically and economically feasible solutions are in urgent need in order to ensure sustainable development in the plastic industry. Polyhydroxyalkanoates (PHAs) are a family of specialized polyesters of hydroxyalkanoates (HAs) and can be completely degraded in natural environment. They can be synthesized naturally or under artificially controlled processes. The barrier of limiting the application of PHAs is the high production cost. From years of study, PHAs are proofed to be able to be accumulated within the bacterial cells in activated sludge and the production yield had been …
An Orthogonal Study Of Industrial Scale Colour Fading Process Of Cotton Fabric, Yaohui Liu, Chester Kin-Man To, Hiu-Yan Cheung, Chi-Wai Kan, Chua Hong
An Orthogonal Study Of Industrial Scale Colour Fading Process Of Cotton Fabric, Yaohui Liu, Chester Kin-Man To, Hiu-Yan Cheung, Chi-Wai Kan, Chua Hong
Faculty of Science & Technology (THEi)
Colour fading is now a popular process used for imparting a vintage look to textile and fashion products, which enhances market value because of the current fashion trends. This study examined a non-aqueous colour fading process with the use of oxygen plasma-induced ozone treatment. An industrial scale machine and commercially available red sulpur-dyed cotton fabric (with 0.5 %, 1.5 % and 2.5 % colour depths) were used in this study. Since the colour fading process factors are inter-related to each other, a specific experiment approach, i.e. orthogonal method, was used for obtaining the optimum conditions in an industrial scale colour …
Atmospheric Pressure Plasma‐Induced Decolorisation Of Cotton Knitted Fabric Dyed With Reactive Dye, Yaohui Liu, Chester Kin-Man To, Mei‐Ki Ngai, Chi-Wai Kan, Chua Hong
Atmospheric Pressure Plasma‐Induced Decolorisation Of Cotton Knitted Fabric Dyed With Reactive Dye, Yaohui Liu, Chester Kin-Man To, Mei‐Ki Ngai, Chi-Wai Kan, Chua Hong
Faculty of Science & Technology (THEi)
The aim of this study was to investigate the decolorisation effect of atmospheric pressure plasma treatment on knitted fabrics dyed with reactive dyes under different processing parameters, ie, air concentration, treatment duration and water content. The fabrics were dyed with reactive dye of a blue colour, and the colour depths were 0.5%, 1.5% and 3.0% on weight of fabric. The colour properties of untreated and plasma‐treated fabric samples were evaluated by means of reflectance, K/S and relative unlevelness index. The colour properties were evaluated instrumentally and quantitatively in order to study the decolorisation effect induced by atmospheric pressure plasma treatment. …
Effect Of Limited Tension Stiffening On Behavior Of Reinforced Concrete Panels In Shear., Xueying Wang, Jun Shang Kuang
Effect Of Limited Tension Stiffening On Behavior Of Reinforced Concrete Panels In Shear., Xueying Wang, Jun Shang Kuang
Faculty of Science & Technology (THEi)
The principal tensile strength of cracked concrete is not well defined in existing models for predicting the shear response of reinforced concrete (RC) membrane elements; hence, the shear strength of RC elements is generally overestimated due to the unrealistic decreasing slope of tensile stress as the crack accumulates. In this paper, the effect of limited tension-stiffening behavior of cracked RC panels under pure shear stresses is investigated by proposing an analytical model named as the tension-stiffening fixed-angle truss model (TFTM). The proposed model includes the limited tension-stiffening effect of post-cracking reinforced concrete and adopts the fixed-angle theory. In the analysis …
Characterisation Of Diesel Vehicle Emissions And Determination Of Remote Sensing Cutpoints For Diesel High-Emitters., Yuhan Huang, Organ Bruce, John L. Zhou, Surawski C. Nic, Yat-Shing Yam, Edward F.C. Chan
Characterisation Of Diesel Vehicle Emissions And Determination Of Remote Sensing Cutpoints For Diesel High-Emitters., Yuhan Huang, Organ Bruce, John L. Zhou, Surawski C. Nic, Yat-Shing Yam, Edward F.C. Chan
Faculty of Science & Technology (THEi)
Diesel vehicles are a major source of air pollutants in cities and have caused significant health risks to the public globally. This study used both on-road remote sensing and transient chassis dynamometer to characterise emissions of diesel light goods vehicles. A large sample size of 183 diesel vans were tested on a transient chassis dynamometer to evaluate the emission levels of in-service diesel vehicles and to determine a set of remote sensing cutpoints for diesel high-emitters. The results showed that 79% and 19% of the Euro 4 and Euro 5 diesel vehicles failed the transient cycle test, respectively. Most of …
Recycling Licoo2 With Methanesulfonic Acid For Regeneration Of Lithium-Ion Battery Electrode Materials., Bin Wang, Xin-Ye Lin, Yuanyuan Tang, Qiang Wang, Michael K.H. Leung, Xiao-Ying Lu
Recycling Licoo2 With Methanesulfonic Acid For Regeneration Of Lithium-Ion Battery Electrode Materials., Bin Wang, Xin-Ye Lin, Yuanyuan Tang, Qiang Wang, Michael K.H. Leung, Xiao-Ying Lu
Faculty of Science & Technology (THEi)
With the massive consumption of lithium-ion batteries in portable consumer electronics and electric vehicles, proper disposal of spent batteries is of paramount importance for sustainable development. In this study, biodegradable organic methanesulfonic acid (MSA) is investigated for the first time to leach valuable metals from waste LiCoO2 powders for battery material regeneration. Under the optimal conditions, leaching efficiencies of lithium and cobalt are achieved at nearly ∼100% and ∼100%, respectively. Comparison experiment indicates that MSA can achieve better leaching performance than previously reported organic acids (e.g. citric acid, malonic acid, succinic acid, oxalic acid) under the same conditions. Besides, strong …
Recent Advancement In Lignin Biorefinery: With Special Focus On Enzymatic Degradation And Valorization, Chong Li, Chao Chen, Xiaofen Wu, Chi-Wing Tsang, Jinhua Mou, Yun Liu, Carol Sze Ki Lin
Recent Advancement In Lignin Biorefinery: With Special Focus On Enzymatic Degradation And Valorization, Chong Li, Chao Chen, Xiaofen Wu, Chi-Wing Tsang, Jinhua Mou, Yun Liu, Carol Sze Ki Lin
Faculty of Science & Technology (THEi)
With the intensive development of lignocellulosic biorefineries to produce fuels and chemicals from biomass-derived carbohydrates, lignin was generated at a large quantity every year. Therefore, lignin has received increasing attention as an abundant aromatics resource in terms of research and development efforts for value-added chemicals production. In this review, studies about lignin degradation especially the crucial enzymes involved and the reaction mechanism were substantially discussed, which provided the molecular basis of lignin biodegradation. Then, the latest improvements in lignin valorization by biological methods were summarized and case studies about value-added compounds from lignin were introduced. Afterwards, challenges, opportunities and prospects …
A Review On High Catalytic Efficiency Of Solid Acid Catalysts For Lignin Valorization, Weixiang Guan, Chi-Wing Tsang, Carol Sze Ki Lin, Christophe Len, Haoquan Hu, Changhai Liang
A Review On High Catalytic Efficiency Of Solid Acid Catalysts For Lignin Valorization, Weixiang Guan, Chi-Wing Tsang, Carol Sze Ki Lin, Christophe Len, Haoquan Hu, Changhai Liang
Faculty of Science & Technology (THEi)
It is imminent to develop renewable resources to replace fossil-derived energies as fossil resources are on the brink of exhaustion. Lignin is one of the major components of lignocellulosic biomass, which is a natural amorphous three-dimensional polymer with abundant C-O bonds and aromatic structure. Hence, valorization of lignin into high value-added liquid fuels and chemicals is regarded as a promising strategy to mitigate fossil resource shortages. Solid acid catalysts are extensively studied due to environmentally friendly in terms of the ease of separation, recovery and reduced amount of wastes. Hence, this review focuses on summarizing the recent progress of catalytic …
Economic Feasibility Of A Gasoline Production Plant From Lignocellulosic Feedstocks, Weixiang Guan, Sim-Ying Chua, Chi-Wing Tsang, Xiao Chen, Carol Sze Ki Lin, Raymond Sze Wai Fu, Haoquan Hu, Changhai Liang
Economic Feasibility Of A Gasoline Production Plant From Lignocellulosic Feedstocks, Weixiang Guan, Sim-Ying Chua, Chi-Wing Tsang, Xiao Chen, Carol Sze Ki Lin, Raymond Sze Wai Fu, Haoquan Hu, Changhai Liang
Faculty of Science & Technology (THEi)
In this study, the conceptual process flowsheet was developed and the economic feasibility of woody biomass conversion to biofuel as feedstock was analysed by considering several promising experimental processes for lignin depolymerization, such as hydrodeoxygenation and hydrogenolysis, along with lignocellulosic biomass fractionation processes. The engineering simulation process toward the commercial production of bio-gasoline from lignocellulosic biomass using SuperPro Designer® was modeled. The compatibility of the end products with the current gasoline specifications was evaluated and various blending options were investigated to meet the octane number and Reid vapor pressure requirement of the product. The economic potential of the simulated engineering …
Tuning The Acidity Of Pt/Cnts Catalysts For Hydrodeoxygenation Of Diphenyl Ether, Weixiang Guan, Chuang Li, Xiao Chen, Xiao-Ying Lu, Chi-Wing Tsang, Haoquan Hu, Hongxu Qi, Changhai Liang
Tuning The Acidity Of Pt/Cnts Catalysts For Hydrodeoxygenation Of Diphenyl Ether, Weixiang Guan, Chuang Li, Xiao Chen, Xiao-Ying Lu, Chi-Wing Tsang, Haoquan Hu, Hongxu Qi, Changhai Liang
Faculty of Science & Technology (THEi)
We herein present a method for the synthesis of HNbWO6, HNbMoO6, HTaWO6 solid acid nanosheet modified Pt/CNTs. By varying the weight of various solid acid nanosheets, a series of Pt/xHMNO6/CNTs with different solid acid compositions (x = 5, 20 wt%; M = Nb, Ta; N = Mo, W) have been prepared by carbon nanotube pretreatment, protonic exchange, solid acid exfoliation, aggregation and finally Pt particles impregnation. The Pt/xHMNO6/CNTs are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and NH3-temperature programmed desorption. The study revealed that HNbWO6 nanosheets were attached on CNTs, with some edges of the nanosheets being …
Lignin Valorizations With Ni Catalysts For Renewable Chemicals And Fuels Productions, Xiao Chen, Weixiang Guan, Chi-Wing Tsang, Haoquan Hu, Changhai Liang
Lignin Valorizations With Ni Catalysts For Renewable Chemicals And Fuels Productions, Xiao Chen, Weixiang Guan, Chi-Wing Tsang, Haoquan Hu, Changhai Liang
Faculty of Science & Technology (THEi)
Energy and fuels derived from biomass pose lesser impact on the environmental carbon footprint than those derived from fossil fuels. In order for the biomass-to-energy and biomass-to-chemicals processes to play their important role in the loop of the circular economy, highly active, selective, and stable catalysts and the related efficient chemical processes are urgently needed. Lignin is the most thermal stable fraction of biomass and a particularly important resource for the production of chemicals and fuels. This mini review mainly focuses on lignin valorizations for renewable chemicals and fuels production and summarizes the recent interest in the lignin valorization over …
Micro/Nanostructured Mnco2o4.5 Anodes With High Reversible Capacity And Excellent Rate Capability For Next Generation Lithium-Ion Batteries, Bin Wang, Shifeng Wang, Yuanyuan Tang, Chi-Wing Tsang, Jinchuan Dai, Michael K.H. Leung, Xiao-Ying Lu
Micro/Nanostructured Mnco2o4.5 Anodes With High Reversible Capacity And Excellent Rate Capability For Next Generation Lithium-Ion Batteries, Bin Wang, Shifeng Wang, Yuanyuan Tang, Chi-Wing Tsang, Jinchuan Dai, Michael K.H. Leung, Xiao-Ying Lu
Faculty of Science & Technology (THEi)
Lithium-ion batteries have already achieved great success in consumer electronics. However, the electrochemical characteristics of the existing electrodes have constrained their widespread applications in electric vehicles, which need technical demands of high energy density and fast charging. Thus, it is highly desirable to explore high-performance electrodes with high reversible capacity and excellent rate capability. In this study, micro/nanostructured MnCo2O4.5 anodes were synthesized by hydrothermal treatment with the presence of positively charged poly(diallyldimethylammonium chloride). Physicochemical property studies suggested that the as-prepared MnCo2O4.5 of 2–5 µm in diameter was mainly composed of numerous nanoneedles, which were further comprised of many inter-connected nanoparticles. …
Year-Round-Based Optimization Of High-Low Control In The Regenerative Indirect Evaporative Cooler (Riec), Huaxia Yan, Yi Chen, Weilong Zhang
Year-Round-Based Optimization Of High-Low Control In The Regenerative Indirect Evaporative Cooler (Riec), Huaxia Yan, Yi Chen, Weilong Zhang
Faculty of Science & Technology (THEi)
The performance of the regenerative indirect evaporative cooler (RIEC) highly depends on ambient temperature and humidity. To maintain indoor thermal comfort, proper control strategy is essential. Previous research indicates that high–low (H-L) control by using multispeed technology is superior to the conventional on–off control in terms of energy consumption and thermal comfort. Under H-L control, a fan switches between a high speed and a low speed. The high speed is determined by the peak load. However, the selection of low speed involves a great sense of subjectivity. Therefore, the influence of low speed on system performance is comprehensively investigated and …
A Novel 3d Simulation Model For Investigating Liquid Desiccant Dehumidification Performance Based On Cfd Technology., Tao Wen, Yimo Luo, Lu Lin
A Novel 3d Simulation Model For Investigating Liquid Desiccant Dehumidification Performance Based On Cfd Technology., Tao Wen, Yimo Luo, Lu Lin
Faculty of Science & Technology (THEi)
Previous 2D CFD simulation models fail to elaborate the actual simultaneous flow and dehumidification process in liquid desiccant cooling system. Accordingly, the present study successfully developed a novel 3D simulation model for investigating the liquid desiccant dehumidification performance of a falling film dehumidifier. The penetration mass transfer model was implemented in the simulation to account for the interfacial dehumidification process. Experimental system was built for the model validation and the results indicated that the newly developed 3D CFD model could predict the absolute moisture removal accurately with an average deviation of 7%. Parametric study revealed that the dehumidification performance was …
Flexible Integration Of Liquid Air Energy Storage With Liquefied Natural Gas Regasification For Power Generation Enhancement, Xiaohui She, Tongtong Zhang, Lin Cong, Xiaodong Peng, Chuan Li, Yimo Luo, Yulong Ding
Flexible Integration Of Liquid Air Energy Storage With Liquefied Natural Gas Regasification For Power Generation Enhancement, Xiaohui She, Tongtong Zhang, Lin Cong, Xiaodong Peng, Chuan Li, Yimo Luo, Yulong Ding
Faculty of Science & Technology (THEi)
Liquid Air Energy Storage (LAES) is one of the most promising energy storage technologies for achieving low carbon emissions. Our research shows that the LAES produces a considerable amount of excess heat that cannot be cost-effectively utilised in a standalone LAES system. On the other hand, the regasification of liquefied natural gas (LNG) often leads to waste of a large amount of high-grade cold energy. Therefore, this paper proposes the integration of the LAES with the LNG regasification process via a Brayton cycle (denoted as LAES-Brayton-LNG), where pressurized propane is used as both the heat transfer fluid and storage material …
A Review Of Renewable Energy Assessment Methods In Green Building And Green Neighborhood Rating Systems, Chong Zhang, Chengliao Cui, Ying Zhang, Jiaqi Yuan, Yimo Luo, Wenjie Gang
A Review Of Renewable Energy Assessment Methods In Green Building And Green Neighborhood Rating Systems, Chong Zhang, Chengliao Cui, Ying Zhang, Jiaqi Yuan, Yimo Luo, Wenjie Gang
Faculty of Science & Technology (THEi)
Green buildings and neighborhoods can help mitigate impacts of buildings on the environment, society and economy. Many rating systems or tools have been developed worldwide to assess and certificate green buildings or green neighborhoods. Renewable energy plays an important role in achieving green buildings/neighborhoods or zero energy buildings/neighborhoods by reducing fuel consumption and pollution emissions. However, substantial differences exist in assessing or quantifying the renewable energy in green building/neighborhood rating systems. This paper therefore provides a comprehensive review on renewable energy assessment methods adopted in green building/neighborhood rating systems, which would be very helpful to understand and then improve the …