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Binding Kinetics Of Monoclonal Antibodies And Fluoroquinolone Derivatives, Patamalai Boonserm
Binding Kinetics Of Monoclonal Antibodies And Fluoroquinolone Derivatives, Patamalai Boonserm
Chulalongkorn University Theses and Dissertations (Chula ETD)
Fluoroquinolones (FQs) are a group of antibiotics which have been extensively used against both Gram-negative and Gram-positive bacteria. Some of FQs antibiotics commonly used in livestock and fishery include norfloxacin, enrofloxacin, ciprofloxacin, and ofloxacin. However, misuse of these antibiotics may cause drug residues in food products. Therefore, to prevent consumers from getting residual antibiotics in food and the drug resistance of pathogens in humans. As a result, surveillance detection program of these drug residues must be in practice to ensure safety of the consumers in many countries. In general, detections based on immunological method include enzyme-linked immunosorbent assay (ELISA) has …
Screening And Identification Of Probiotic Lactic Acid Bacteria From Plant Samplesd, Ratthanatda Nuhwa
Screening And Identification Of Probiotic Lactic Acid Bacteria From Plant Samplesd, Ratthanatda Nuhwa
Chulalongkorn University Theses and Dissertations (Chula ETD)
Seventy lactic acid bacteria (LAB) were isolated from flowers (17 strains), 3 tree barks (7 strains), one fruit (2 strains), ten fermented tea leaves (31 strains) and two silage (13 strains). They were identified as Lactobacillus pentosus (12 strains), L. plantarum subsp. plantarum (9 strains), L. paracasei subsp. tolerans (5 strains), L. brevis (1 strain), L. silagincola (1 strain), L. kunkeei (1 strain), and L. formosensis (1 strain), Enterococcus durans (3 strains), E. lactis (2 strains), E. faecalis (1 strain), E. faecium (1 strain), E. gallinarum (1 strain) and E. gilvus (1 strain), Pediococcus acidilactici (1 strain) and P. pentosaceus …
Development Of Oxidase Enzyme And Non-Enzyme Based Biosensors For Lactate And Creatinine Detection, Siraprapa Boobphahom
Development Of Oxidase Enzyme And Non-Enzyme Based Biosensors For Lactate And Creatinine Detection, Siraprapa Boobphahom
Chulalongkorn University Theses and Dissertations (Chula ETD)
This dissertation focused on the development of electrochemical sensors based on metal oxides and graphene modified electrodes for clinical applications, which is divided into two parts. The first part is development of a biosensor based on lactate oxidase (LOx) immobilized on titanium dioxide sol (TiO2 sol)/graphene nanocomposite modified nickel (Ni) foam electrode for enzymatic electrochemical detection of lactate via hydrogen peroxide (H2O2) detection. A TiO2/graphene nanocomposite was simply synthesized by hydrolysis and coated on Ni foam electrode to develop a novel electrode in biosensor. The results showed that the well intercalation of TiO2 sol within graphene film covered on the …
Role Of Enzymes In Glyoxylate Cycle In Transgenic 'Kdml 105' Rice Oryza Sativa L. Overexpressing Oscam1-1 Under Salt Stress, Tanaporn Ausaha
Role Of Enzymes In Glyoxylate Cycle In Transgenic 'Kdml 105' Rice Oryza Sativa L. Overexpressing Oscam1-1 Under Salt Stress, Tanaporn Ausaha
Chulalongkorn University Theses and Dissertations (Chula ETD)
The previous study reported that the transcriptome profiling of the KDML 105 rice overexpressing OsCam1-1 widely affected the expression of genes involved in several cellular processes including the genes associated with the glyoxylate cycle, which exhibited up-regulation in KDML 105 overexpressing OsCam1-1 under salt stress. In this study, we focused on the role of the glyoxylate cycle in transgenic KDML 105 rice under salt stress. The phenotypes as follows: fresh weight and dry weight of shoot & root, SPAD value, activities of isocitrate lyase, and malate synthase; sugar, and starch contents, and total lipid content were investigated at 0, 2, …
Marketing Strategy Development For Professional Services Firms: Case Study Of Certified Audit Firms In Russia, Dmitrii Bushkov
Marketing Strategy Development For Professional Services Firms: Case Study Of Certified Audit Firms In Russia, Dmitrii Bushkov
Chulalongkorn University Theses and Dissertations (Chula ETD)
This work is devoted to developing a strategy based on the Blue Ocean Strategy framework for audit firms in Russia. Today, audit firms in Russia are in an awkward position, caused by a fall of revenue in real terms, a high level of competition and a difficult economic situation. Therefore, audit firms are forced to look for new ways to grow their business. The paper analyzes the market for audit services in the period from 2009 to 2018, including structural analysis, revenue analysis, and assessment of the impact of the largest audit firms on the market. The historical background shows …
Legal Analysis On Bankability Of Hydro Floating Solar Project In Thailand, Natdanai Aramtiantamrong
Legal Analysis On Bankability Of Hydro Floating Solar Project In Thailand, Natdanai Aramtiantamrong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In comparison to other types of renewable energy projects, hydro floating solar projects are more complicated as public water resources are used as the location of the project but the electricity is generated from solar power. Accordingly, it is unclear whether the operation of the project falls within the definition of water use that is subject to the Water Resources Act B.E.2561(2018) or not. Several interpretations on the definition of water use in Section 4 of this Act may cause challenges in the bankability of the project. In order to fund the project, the project company generally relies on the …
The Experience Of The Application Of Safeguards On Certain Iron Or Steel Products In Indonesia : Lesson For Thailand, Nattanit Santimetvirul
The Experience Of The Application Of Safeguards On Certain Iron Or Steel Products In Indonesia : Lesson For Thailand, Nattanit Santimetvirul
Chulalongkorn University Theses and Dissertations (Chula ETD)
In comparison to other trade remedies under WTO, the number of safeguard measures imposed by WTO members has been relatively low as the requirements of safeguard is difficult to fulfill. However, there is change to such trend as there has been an increase in number of safeguard measures imposed by Indonesia. The Appellate Body Report on Indonesia — Safeguard on Certain Iron or Steel Products has provided important lesson to Thailand concerning on the determination of safeguard measure which has not been clearly mentioned in the WTO cases. The importance of safeguard characterization has been emphasized. This dispute has given …
B2c Online Dispute Resolution (Odr) Legal Frameworkfor Myanmar, Nwe Ni Htun
B2c Online Dispute Resolution (Odr) Legal Frameworkfor Myanmar, Nwe Ni Htun
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis examines the applicability of ODR mechanism for consumer disputes in Myanmar especially cross-border disputes. The paper consists of introduction; three main parts and a conclusion. The effect is the appearance of ODR and understanding of what is meant by ODR, how it works and why ODR is needed for consumer. It concludes the review of ODR by both information and communication technology (ICT) and legal view. The paper focuses on case study analysis and compares the legal framework; institutions based on the problem analysis form each case of ODR in the EU and Myanmar. Moreover why use ODR …
Challenges Of Excise Tax Reform In Myanmar : Illegal Alcohol Market And Method Of Charging On Alcoholic Beverages, Ngu Wah Maung
Challenges Of Excise Tax Reform In Myanmar : Illegal Alcohol Market And Method Of Charging On Alcoholic Beverages, Ngu Wah Maung
Chulalongkorn University Theses and Dissertations (Chula ETD)
Myanmar excise tax system is started from the British colonial regime. Excise tax system of Myanmar is complex and different from the other country. Myanmar excise tax system was reformed in several times. Before 2016, alcohol tax was collected as commercial tax. In 2016, the Specific Goods Tax Law was enacted and excise tax for alcoholic beverages has been named as specific goods tax under this law. According to this law excise tax was collected as specific goods tax. Reducing the alcohol consumption is one of the purposes of this law. This thesis analyses weaknesses of Myanmar excise tax system …
Ethanol Dehydration Over Wo3/Tio2 Catalysts Using Titania Derived From Sol-Gel And Solvothermal Methods With Palladium Modification, Anchale Tresatayawed
Ethanol Dehydration Over Wo3/Tio2 Catalysts Using Titania Derived From Sol-Gel And Solvothermal Methods With Palladium Modification, Anchale Tresatayawed
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this research, the characteristics and catalytic activity of WO3/TiO2 prepared by sol-gel and solvothermal and their metal modified were investigated. The research was divided into two parts. In the first part, the catalyst performance of WO3/TiO2 catalysts using titania derived from sol-gel and solvothermal methods over ethanol dehydration reaction was examined. The results showed that the different preparation methods essentially altered the physicochemical properties of TiO2 supports. It revealed that the titania derived from solvothermal method denoted as TiO2-SV exhibited higher surface area and pore volume, and larger amounts acid sites than the one obtained from sol-gel method (TiO2-SG). …
Development Of Bioplastic Blown Films To Be Used As A Packaging For Dried Banana, Apinya Wongthanaroj
Development Of Bioplastic Blown Films To Be Used As A Packaging For Dried Banana, Apinya Wongthanaroj
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research aimed to study effects of poly(butylene adipate-co-terephthalate) (PBAT) contents on properties of polylactic acid / poly(hydroxybutyrate-co-hydroxyvalerate) / poly (butylene adipate-co-terephthalate) (PLA/PHBV/PBAT) blends to be used as a packaging for solar-dried bananas. The blend of PLA and PHBV (PLA/PHBV) was fixed at weight ratio of 80/20 while the PBAT content was varied from 0-30 wt%. The films were prepared by melt compounding and blown film extrusion. It was found that the addition of PBAT decreased barrier properties of PLA/PHBV film. Gas barrier which is oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) increased with increasing of PBAT …
Production Of Activated Carbonaceous Catalyst For Their Application In Bio Jet-Fuel Synthesis, Araya Smuthkochorn
Production Of Activated Carbonaceous Catalyst For Their Application In Bio Jet-Fuel Synthesis, Araya Smuthkochorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Recently, research and development in alternative aviation fuel to replace fossil-based fuel has been of interest for many research works. Hydrodeoxygenation (HDO) is one of the most efficient processes to produce clean fuel. This study involves the synthesis of activated carbon (AC) from heavy fuel oil (HFO) via the carbonization-chemical activation process for utilization as catalyst support. AC with a high surface area of 1527.4 m2/g was obtained from KOH-activation in the ratio of 1:1 and carbonization temperature of 700°C. The molybdenum phosphide (MoP) catalyst impregnated on AC was prepared via the wet impregnation process. The microscopic analysis revealed the …
Solar Energy Management System For Stand-Alone Application : Analysis Of Power Management Strategies Under Different Solar Irradiance Profiles, Chacrit Lerdwithayaprasit
Solar Energy Management System For Stand-Alone Application : Analysis Of Power Management Strategies Under Different Solar Irradiance Profiles, Chacrit Lerdwithayaprasit
Chulalongkorn University Theses and Dissertations (Chula ETD)
Clean power generation from various renewable energy sources has been gaining much attention due to sustainable and environmental reasons. As renewable energy sources and power demand vary, a hybrid power system and proper energy management are required. This study is focused on the development of an energy management system (EMS) in the hybrid renewable energy system consisting of photovoltaic cell (PV), proton exchange membrane fuel cell (PEMFC), and proton exchange membrane electrolysis cell (PEMEC). A vanadium redox flow battery (VRFB) as energy storage for long-term operation is integrated into such a hybrid system. The models of each subsystem are developed …
Co-Electrodeposition Of Gold Nanoparticle And Reduced-Graphene Oxide In Application Of Achetylcholinesterase Biosensor, Chiranthanin Mahayotheecharak
Co-Electrodeposition Of Gold Nanoparticle And Reduced-Graphene Oxide In Application Of Achetylcholinesterase Biosensor, Chiranthanin Mahayotheecharak
Chulalongkorn University Theses and Dissertations (Chula ETD)
A rapid pesticide detection technique is highly desirable due to the widespread usage of many pesticides in the agricultural industry. An emerging technique that shows promising potential is an electrochemical biosensor. The technique allows sensitive and rapid quantification of an analyte. Due to its simplicity, it could be a potential alternative to traditional method. In this work, we utilised a composite materials consist of partially reduced graphene oxide (rGO) and gold nanoparticle (AuNPs) to fabricate a disposable AChE biosensor on a Screen-Print Carbon electrode. The composite rGO and AuNPs possess high electron conductivity while AuNPs also exhibit desirable biocompatibility. The …
Mechanism And Reaction Pathways Of Co2 And Hco3-Photoreduction To Hydrocarbons, Duangthip Sattayamuk
Mechanism And Reaction Pathways Of Co2 And Hco3-Photoreduction To Hydrocarbons, Duangthip Sattayamuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
CO2/HCO3- photocatalytic reductions in water, using P25 Titanium dioxide, produce gas products at the order of the following rate: CO>H2>CH4, using bicarbonate as a substrate, reduction rates are ca. 5 times faster than using CO2 due to the adsorption constant of CO2 on the TiO2 surface is smaller than the bicarbonate. Langmuir-Hinshelwood kinetic model was used to describe the mechanism; therefore, adsorption constant (K) and the rate of maximum substrate coverage (k) at different charges of P25-surface were readily obtained. The K constant of TiO2-adduct formation favors no charge surface but k constant favors positive charge surface. Most …
Modeling Aromatics Production From Mixtures Of Butanes And Butenes With Chemical Equilibria, Hataipat Sangwattanakul
Modeling Aromatics Production From Mixtures Of Butanes And Butenes With Chemical Equilibria, Hataipat Sangwattanakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Aromatics production from C4 hydrocarbons is an interesting way to increase economic values and mixed C4 usage alternatives. This study was to model aromatics production from mixtures of butanes and butenes, enabling industrial work to be more developed and actualized by reducing laboratory cost and experimental time. The model was regarded as an equilibrium state in which the forward reaction rate and the reverse reaction rate are equivalent. The catalysts would be Zn loaded on ZSM-5/ZSM-11 under 480 ⁰C and 0.4 MPa and MoC loaded on HZSM-5 under 500 ⁰C and 1 atm. The reactions in the models were from …
Preparation Of Natural Rubber Powder Modified With Bis(Triethoxysilylpropyl)Tetrasulfide Treated Silica By Spray Drying Process, Intira Boonvisood
Preparation Of Natural Rubber Powder Modified With Bis(Triethoxysilylpropyl)Tetrasulfide Treated Silica By Spray Drying Process, Intira Boonvisood
Chulalongkorn University Theses and Dissertations (Chula ETD)
In polymer industry, Natural rubber powder (NRP) is broadly used because of its stability and useability. Although, NRP is difficult to be produced due to the rubber adhered together. Consequently, silica was used to encapsulated the rubber particle to avoid adhesion of rubber. However, there is a polarity difference between silica and rubber. Silica can be made hydrophobic via surface modification with silane coupling agent, bis[3-(triethoxysilyl)propyl]tetrasulfide (TESPT). This research study aimed to prepare uniform silica-coated NRP via a combination of silane modification and spray drying technique. The effect of the mass ratio of TESPT and silica is 1%, 5%, 8%, …
Iodine Encapsulation Using Anionic Polyelectrolytes For Rechargeable Zinc-Iodine Batteries, Jirapha Pimoei
Iodine Encapsulation Using Anionic Polyelectrolytes For Rechargeable Zinc-Iodine Batteries, Jirapha Pimoei
Chulalongkorn University Theses and Dissertations (Chula ETD)
Rechargeable zinc-iodine batteries are attractive as promising candidates for electrical energy storage due to their abundant resources, low cost, and high safety. However, these batteries still have some problems, such as poor cycling stability and high self-discharge due to the leakage of iodine species from the positive electrode. Anionic polyelectrolytes can be applied as supportive binders to alleviate this issue because these polyelectrolytes can encapsulate iodine species and facilitate the transfer of other active species. In this study, different types of anionic polyelectrolytes, including sodium carboxymethyl cellulose (Na-CMC), sodium alginate (Na-Alg), and sodium polystyrene sulfonate (Na-PSS), were investigated. The batteries …
Single-Step Conversion Of Xylose To Furfural And Furfuryl Alcohol On Zeolite-Based Catalyst, Jirapat Chatkaweekoon
Single-Step Conversion Of Xylose To Furfural And Furfuryl Alcohol On Zeolite-Based Catalyst, Jirapat Chatkaweekoon
Chulalongkorn University Theses and Dissertations (Chula ETD)
Furfural possesses the potential to be utilized as a platform compound for the synthesis of a wide variety of chemicals, especially furfuryl alcohol, which is an important intermediate used to produce high-value chemicals. In this research, several types of zeolite catalysts in hydrogen form are used as catalysts for conversion of xylose to produce furfural and furfuryl alcohol in one step. The reaction is carried out under 130°C, 30 bar hydrogen pressure, and 2 h reaction time. Acid site types (Lewis and Bronsted) are important for the catalysis and distribution of the product. Bronsted acid sites promote xylose dehydration to …
Catalytic Dehydration Of Ethanol With Different Loading Of Wo3 Supported On Activated Carbon And Clay Catalysts, Jirayu Liewchalermwong
Catalytic Dehydration Of Ethanol With Different Loading Of Wo3 Supported On Activated Carbon And Clay Catalysts, Jirayu Liewchalermwong
Chulalongkorn University Theses and Dissertations (Chula ETD)
The catalytic ethanol dehydration is a reaction, which increases the value of ethanol by producing diethyl ether (DEE) or ethylene. The catalysts which have been used for this reaction were tungsten catalysts supported on activated carbon and montmorillonite catalysts, by varying W loading between 2-13.5 wt.%. The catalysts were tested in a fixed bed microreactor under atmospheric pressure and temperature range of 200 to 400˚C. The results showed that Low tungsten on catalyst decreased the total surface acidity. Besides, additional tungsten loading increased the total surface acidity. Low tungsten loading enhanced ethanol dehydrogenation to acetaldehyde. The high content of tungsten …
Effects Of Cuo/Zno/Al2o3 Catalyst Modification Using Zr, Mn And Si For Methanol Synthesis Via Co2 Hydrogenation, Kamonlak Pongpanumaporn
Effects Of Cuo/Zno/Al2o3 Catalyst Modification Using Zr, Mn And Si For Methanol Synthesis Via Co2 Hydrogenation, Kamonlak Pongpanumaporn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Currently, the estimated CO2 amount has tended to increase interesting of population. One of the most effective utilization ways of CO2 is to convert CO2 to higher valued chemicals. Thus, methanol was chosen to produce via CO2 hydrogenation by using CuO/ZnO/Al2O3 (CZA) catalyst. In the first part, CZA was prepared by co-impregnation method under different pH (7, 8 and 9) during co-precipitation. It was found that the suitable pH was 8 (CZA-PH8) due to high surface area, high basicity, and reducibility. The CO2 conversion and methanol selectivity were 2.6% and 10%, respectively at 250oC under atmospheric pressure. However, it should …
Deactivation Of Ti-Based And Γ-Al2o3 Catalysts In Liquid-Phase Methyl Oleate Epoxidation Reaction, Kanokpon Maungthong
Deactivation Of Ti-Based And Γ-Al2o3 Catalysts In Liquid-Phase Methyl Oleate Epoxidation Reaction, Kanokpon Maungthong
Chulalongkorn University Theses and Dissertations (Chula ETD)
To eliminate some drawback of heterogeneous catalysts as a low stability, the deactivation scheme and surface regeneration of TiO2 (P25), TS-1 and γ-Al2O3 catalysts was investigated on the liquid-phase methyl oleate epoxidation reaction at 50 ºC. Based on the results, there are two deactivation effects illustrated on the surface after the reaction: (1) the fouling effects are found the main deactivation on this reaction. There are three types which type 1 is found in P25 and γ-Al2O3, type 2 is uncovered in TS–1 and γ-Al2O3, and type 3 is appeared in γ-Al2O3 only. The FT-IR reveals that are alkane (C–H) …
Development Of Stack Model For Tri-Electrode Rechargeable Zinc-Air Cylindrical Flow Battery, Kanya Bumroongsil
Development Of Stack Model For Tri-Electrode Rechargeable Zinc-Air Cylindrical Flow Battery, Kanya Bumroongsil
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, the demand for renewable energy is continuously increasing. Therefore, an efficient energy storage system is essential. Zinc-air batteries have received extensive attention because they use low-cost material but offer great safety benefits. This research, therefore, develops a stack model for a tri-electrode tubular designed rechargeable zinc-air flow battery for using in a large scale system. The connection of battery cells in series and parallel is studied. The connection of battery cell with common flowing electrolyte creates a shunt current. A mathematical model is developed and validated against experimental data, which measured both full cell and half cell potentials. The …
A Study On The Deactivation Of Nickel-Based Catalyst For The Dry Reforming Of Methane Via Density Functional Theory, Mongkol Lerdpongsiripaisarn
A Study On The Deactivation Of Nickel-Based Catalyst For The Dry Reforming Of Methane Via Density Functional Theory, Mongkol Lerdpongsiripaisarn
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this work, the stability assessment of catalyst for the dry reforming reaction was investigated through the coke resistance performance and the ability of coke removal. The coke resistance performance was considered via the coke adsorption energy. For surface 100 and 211, NiCo bimetallic catalyst and Ni exhibit weaker bonding between coke and catalyst surface. For surface 111, both catalysts exhibited similar adsorption energy value. NiCo bimetallic catalyst also showed higher adsorption energy for surface 111 and 211 than the noble metal catalyst such as Rh and Pd catalyst which means NiCo catalysts can show the coke resistance performance that …
Study Of Thermal And Mechanical Properties Of Tertiary Blend Of Poly(Lactic Acid), Poly(Hydroxybutyrate-Co-Hydroxyvalerate) And Thermoplastic Starch, Naphat Yampry
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, single-use plastics such as straws, plastic bags cause plastic waste problems because the majority of these plastics which are petroleum-based plastics are not compostable and difficult to recycle. As a result, biodegradable plastic is a proper option to replace traditional plastic. The objective of this work was to study the morphology as well as the thermal and mechanical properties of tertiary blend of poly(lactic acid) (PLA), poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) and thermoplastic starch (TPS). PLA/PHBV at weight ratios of 80/20, 70/30, and 60/40 were prepared to find the optimal ratio. Then the PLA/PHBV at weight ratio of 80/20 was added by …
Development Of Zero-Waste Package For Asphalt From Natural Rubber / Ethylene Vinyl Acetate Copolymer Thermoplastic Vulcanizates, Nappaphan Kunanusont
Development Of Zero-Waste Package For Asphalt From Natural Rubber / Ethylene Vinyl Acetate Copolymer Thermoplastic Vulcanizates, Nappaphan Kunanusont
Chulalongkorn University Theses and Dissertations (Chula ETD)
Asphalt is normally delivered in liquid form which was heated all the time. It consumes more energy and need the special truck to deliver it. An alternative way to deliver the asphalt in form of solid covered with package can reduce energy consumption and normal truck can be used to deliver. The objective of this research was to develop the zero-waste package for asphalt that was no waste after use and not harmful to asphalt properties. The research consists of two parts which are (1) development of package from natural rubber (NR) and ethylene vinyl acetate copolymer (EVA) thermoplastic vulcanizates …
Improvement And Economic Analysis Of Bio-Hydrogenated Diesel Production For Producing Bio-Jet Fuel, Nattamon Munkong
Improvement And Economic Analysis Of Bio-Hydrogenated Diesel Production For Producing Bio-Jet Fuel, Nattamon Munkong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this study, process improvement of bio-hydrogenated diesel (BHD) production to produce jet fuel as an alternative product was carried out. The BHD was produced from palm oil with NiMo/Y-Al2O3 catalyst, while the bio-jet fuel was produced by catalytic cracking of the BHD product using NiAg/SAPO-11 catalyst, followed by appropriate separations. Process simulation by using Aspen Plus program was performed to evaluate the improved process. A comparison with a base case BHD production process was also demonstrated and discussed. It was found that a conventional existing BHD process can be improved by plugging in a hydrocracking/isomerization unit to process. The …
Study Of Co2 And Bi-Reforming Of Methane On Modified Nickel-Based Catalysts, Nichakorn Buasuk
Study Of Co2 And Bi-Reforming Of Methane On Modified Nickel-Based Catalysts, Nichakorn Buasuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, several currently operated industrial factories significantly increase the rate of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) far higher than those that should be normally. Therefore, various mitigation ways to reduce carbon dioxide and methane are increasingly important. The prevailing methods are dry reforming of methane and bi-reforming of methane. Therefore, this research involves the study of the catalytic activity and coke resistance on the Ni-based catalysts with and without a promoter. The activity tests on the dry reforming of methane reaction and bi-reforming of methane reaction were performed in a fixed-bed reactor under atmospheric pressure at …
Development And Characterization Of Natural Rubber-Cellulose Sponge, Nuttapon Suppanucroa
Development And Characterization Of Natural Rubber-Cellulose Sponge, Nuttapon Suppanucroa
Chulalongkorn University Theses and Dissertations (Chula ETD)
Natural rubber (NR) sponges are a renewable biopolymer material derived from milky sap (latex) from rubber trees. In this study, composite sponges of natural rubber and cellulose (NR-C) with various compositions were synthesized. The Dunlop process was employed to prepare the NR-C sponges in various contents of cellulose fibers as reinforcing agent. The cellulose fibers were extracted from the pulp of eucalyptus trees and sodium alginate (SA) was used as dispersing agent. The aim of this work was to develop a green composite sponge with highly porous, flexible, and hydrophilic properties. The effects of cellulose loading on mechanical performance of …
Application Of Co-Solvent For Biodiesel Production In Ultrasound-Assisted Reactor, Panidaporn Ritprasert
Application Of Co-Solvent For Biodiesel Production In Ultrasound-Assisted Reactor, Panidaporn Ritprasert
Chulalongkorn University Theses and Dissertations (Chula ETD)
Biodiesel has been a promising alternative energy due to its renewability and lesser emissions of harmful gases such as carbon monoxide in comparison to traditional petroleum diesel fuel. Mostly, biodiesel production via transesterification requires catalyst to achieve faster reaction rate and complete the reaction. However, mass transfer between two immiscible reactants are obstacle to the biodiesel production. In this work, ultrasound-assisted (US) reactor and addition of co-solvent were used to overcome mass transfer limitation. The condition for biodiesel production from transesterification of palm oil using a circulated US reactor and addition of co-solvent was operated at 60°C, 1 atm, calcium …