Chemical Engineering Commons^™

Point Density For Soil Specimen Volume Measurements In Image-Based Methods During Triaxial Testing, Sara Fayek, Xiong Zhang, Javad Galinmoghadam, Jeffrey D. Cawlfield

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Discrete Measurement Targets Were Frequently Utilized in Image-Based Methods on the Specimen's Surface to Monitor the Soil Specimen during Triaxial Testing. However, the Required Density of Measurement Targets that Should Be Used in Triaxial Testing to Achieve Highly Accurate Volume Measurement Has Not Been Investigated. to overcome This Limitation, This Paper Presents a Parametric Study to Determine the Optimum Target/point Densities to Be Utilized on the Triaxial Soil Specimen Surface to Achieve the Desired Level of Volume Measurement Accuracy in Image-Based Methods. LiDAR Scanning Was Applied to Establish the "Ground Truth" Volume of the Specimen. the Effects of Deformation and …

Concentration Field Based Micropore Flow Rate Measurements, Matia P. Edwards, Samuel F. D. J. Gómez, Michael S. H. Boutilier

Chemical and Biochemical Engineering Publications

Demand is growing for a larger catalogue of experimental techniques to measure flow rates through micro-/nanoscale systems for both fundamental research and device development. Flow emerging from a hole in a plane wall is a common system of interest in such work for its relevance to membrane separation. In this paper, we consider the possibility of measuring volume flow rates through small scale orifice plates from images of dye dispersions downstream. Based on approximate analytical solutions to the advection–diffusion equation, we show that, at low Reynolds numbers, the concentration in the nearly hemispherical plume that forms increases linearly with inverse …

Experimental Study: Investigating The Anions And Cations' Effects On The Elasticity Of The Anionic And Cationic High Viscosity Friction Reducers, Xiaojing Ge, Ghith Biheri, Abdulmohsin Imqam, Baojun Bai, Yuwei Zhang

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

High viscosity friction reducers (HVFRs) are widely used as friction-reducing agents and proppant carriers during hydraulic fracturing. The reuse of produced water has gained popularity due to environmental and economic benefits. Currently, the field's most commonly used friction reducers are anionic and cationic HVFRs. Anionic HVFRs are typically pumped with freshwater, while cationic HVFRs are used with high Total Dissolved Solids (TDS) produced water. Cationic friction reducers are believed to have better TDS tolerance, friction reduction performance, and proppant transport capabilities compared to anionic friction reducers under high TDS conditions due to their superior viscoelastic properties. In addition, the impact …

Finite Line Relief Well System Design For Dams And Levees, Andrew M. Keffer, Erich D. Guy, Katherine R. Grote

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

An Analytical Method is Commonly Used to Design Relief Well Systems by Assuming the Well Line Extends an Infinite Distance Parallel to the Dam or Levee. This Assumption May Be Met in Some Cases, But When a Well Line is of Finite Length, This Can Severely Underestimate Excess Heads. Although These Consequences Have Been Historically Recognized, a Practical Graph-Based Analytical Approach for Finite Well Line Design Has Not Been Developed. Finite Well Lines Exist and Continue to Be Installed at Many Locations, So This Study Developed a Practical Design Method for Such Systems. Analytical Solutions and Numerical Models Were Used …

Oil Recovery Performance And Asphaltene Deposition Evaluation Of Miscible And Immiscible Carbon Dioxide Or Nitrogen Huff-N-Puff Processes In Shale Reservoirs, Mukhtar Elturki, Abdulmohsin Imqam, Shari Dunn-Norman, Hasan Shaglouf, Ahmed Kablan

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The utilization of gas enhanced oil recovery to extract oil from unconventional reservoirs has become a widely discussed topic, as it has proven to be effective in significantly boosting oil recovery rates. Among various enhanced oil recovery methods, Gas Enhanced Oil Recovery (GEOR) is a frequently implemented approach. However, a significant challenge encountered during the process of injecting Carbon Dioxide (CO₂) or Nitrogen (N₂) to displace oil is the occurrence of asphaltene precipitation and deposition, which can impede production. This work is an experimental study to examine the effects of cyclic (huff-n-puff) CO₂ or N …

The Taphonomic Character, Occurrence, And Persistence Of Upper Permian–Lower Triassic Plant Assemblages In The Mid-Paleolatitudes, Bogda Mountains, Western China, Robert A. Gastaldo, Mingli Wan, Wan Yang

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The Bogda Mountains, Xianjiang Uygur Autonomous Region, Western China, Expose an Uppermost Permian–Lower Triassic Succession of Fully Continental Strata Deposited Across Three Graben (Half Graben) Structures in the Mid-Paleolatitudes of Pangea. a Cyclostratigraphy Scheme Developed for the Succession is Subdivided into Three Low-Order Cycles (Wutonggou, Jiucaiyuan, Shaofanggou). Low-Order Cycles Are Partitioned into 1838 High-Order Cycles based on Repetitive Environmental Changes, and their Plant Taphonomic Character is Assessed in . 4700 M of High-Resolution, Measured Sections Distributed Across ~ 100 Km. Four Taphonomic Assemblages Are Represented By: Permineralized Wood (Both Autochthonous and Allochthonous), Megafloral Adpressions (?parautochthonous and Allochthonous) Identifiable to Systematic …

Comparing Weathering Effects Of Ultraviolet And Xenon Arc Accelerated Aging On Polyvinyl Chloride, Collin Mcinnes

Williams Honors College, Honors Research Projects

As the ubiquitousness of polymers increases and begins seeing use in outdoor settings, the need to fully understand how these materials degrade is also necessary. This study aims to compare two known accelerated aging methods, namely an ultraviolet light chamber and a xenon arc light chamber, to understand what differences, if any, manifest in the mechanical, chemical, and cosmetic deterioration of polyvinyl chloride (PVC) after long-term exposure. The study utilizes Fourier-transform infrared spectroscopy, dynamic mechanical analysis, thermogravimetric analysis, and colorimetry analysis to determine the extent of degradation and potential discrepancies between the aging methods.

3d Cfd Simulation Of A Bubble Column With Internals: Validation Of Interfacial Forces And Internal Effects For Local Gas Holdup Predictions, Hayder Al-Naseri, Joshua P. Schlegel, Muthanna H. Al-Dahhan

Nuclear Engineering and Radiation Science Faculty Research & Creative Works

CFD Models (Turbulent Models and Interfacial Forces) Incorporated with the Population Balance Model (PBM) Have Been Validated, Azimuthally, with the Gamma-Ray-Computed Tomography (CT) Results to Address the Effect of the Presence of Internals with Different Arrangements and Diameters. the Superficial Gas Velocity Applied Was Varied from 0.05 to 0.45 M/s. the Results Exhibit the Capability to Predict the Hydrodynamics of the Bubble Column, Further Incorporating the Population Balance Model and Promoting the Prediction of Simulation in High Superficial Gas Velocity. the Effect of Internals Revealed that the Gas Holdup Was Significantly Enhanced in the Bubble Column's Wall Region, While the …

Recovery Of Valuable Metals From Electronic Waste Using A Novel Ammonia-Based Hydrometallurgical Process, Peijia Lin

Theses and Dissertations--Mining Engineering

The growing quantity of waste electrical and electronic equipment (WEEE), also known as electronic waste (E-waste), has been an area of growing public concern. The abundance of valuable metals contained in waste printed circuit boards (WPCBs) has made it a promising secondary resource, especially for Cu and Au. Although the recovery of metals from WPCBs via hydrometallurgical routes has been studied extensively over the past 20 years, most of the research has been limited in the laboratory. In current hydrometallurgical processes, strong acids and expensive oxidizers are often used to ensure a high recovery of metals without considering the sustainability …

A Process Intensification Approach To Improve Volatile Fatty Acids Production, Extraction, And Valorization, Can Liu

Theses and Dissertations--Biosystems and Agricultural Engineering

Anaerobic digestion (AD) is a widely used biowaste conversion method. Recent studies have explored arrested methanogenesis as an alternative approach to leverage existing AD facilities and produce volatile fatty acids (VFAs) instead of biogas. VFAs have been recognized as precursors for a range of value-added chemicals and bioproducts. Arrested methanogenesis involves inducing acidic fermentation by halting the AD process before methanogenesis. It has been found that higher organic loading and thermophilic conditions enhance VFA accumulation and stabilize the acidic fermentation (AF) system.

Brewer's spent grain (BSG), a significant by-product of the brewing industry, was employed as the feedstock for VFA …

Magnetic Inversion Approach For Modeling Data Acquired Across Faults: Various Environmental Cases Studies, Khalid S. Essa, Eid R. Abo-Ezz, Neil Lennart Anderson, Omar A. Gomaa, Mahmoud Elhussein

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

An effective extension to the particle swarm optimizer scheme has been developed to visualize and modelize robustly magnetic data acquired across vertical or dipping faults. This method can be applied to magnetic data sets that support various investigations, including mining, fault hazards assessment, and hydrocarbon exploration. The inversion algorithm is established depending on the second horizontal derivative technique and the particle swarm optimizer algorithm and was utilized for multi-source models. Herein, the inversion method is applied to three synthetic models (a dipping fault model contaminated without and with different Gaussian noises levels, a dipping fault model affected by regional anomaly, …

The Influence Of Tropical Atlantic Sea-Surface Temperatures And The North Atlantic Subtropical High During The Maya Droughts, Derek K. Gibson, Jonathan Obrist-Farner, Brooke A. Birkett, Jason H. Curtis, Melissa A. Berke, Peter M.J. Douglas, Prudence M. Rice, Jeremy Maurer

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The frequency and duration of Late-Holocene hydrologic extremes in northern Guatemala were investigated using multiple sedimentological and geochemical proxies preserved in a sediment core collected from Lake Petén Itzá. A general trend of increasing aridity in the Maya Lowlands during the past 2000 years was punctuated by several multidecadal- to centennial-scale drought events recorded in the Petén Itzá sediments. In particular, the period spanning the Maya Terminal Classic Period and the Medieval Climate Anomaly (MCA), between 800 and 1300 CE, was marked by several extreme droughts and included the driest conditions of the past 2000 years between 950 and 1100 …

Scalable And Continuous Fabrication Of Dendrimer Based Gene And Protein Delivery Systems, Joseph Johnston

Masters Theses

"Gene and protein therapeutics play critical roles in the drug market and represent the future of biopharmaceuticals. Polymeric nanoparticle-based gene/protein delivery systems are promising owing to their ability to protect the cargo from degradation, improving intracellular delivery and transfection efficiency as well as abundant sources and flexibility to be modified. Yet the successful industrialized production and clinical application of polymeric nanoparticle-based delivery systems have long been limited by unsatisfied delivery efficiency and the lack of reproducible and scalable methods for the preparation of uniform nanoparticles with good batch to batch consistency. To address the unsatisfied efficacy and difficulty in scale-up …

Drainage And Sedimentary Response Of The Northern Andes And The Pebas System To Miocene Strike-Slip Tectonics: A Source To Sink Study Of The Magdalena Basin, S. Zapata, L. Calderon-Diaz, C. Jaramillo, Francisca Oboh-Ikuenobe, J. C. Piedrahita, M. Rodríguez-Cuevas, A. Cardona, E. R. Sobel, M. Parra, V. Valencia, A. Patiño, J. S. Jaramillo-Rios, M. Flores, J. Glodny

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Miocene strike-slip tectonics was responsible for creating and closing short-lived (ca. 6 Ma) passages and the emergence of isolated topography in the Northern Andes. These geological events likely influenced the migration and/or isolation of biological populations. To better understand the paleogeography of the Miocene hinterland and foreland regions in the Northern Andes, we conducted a source-to-sink approach in the Magdalena Basin. This basin is located between the Central and Eastern Cordilleras of Colombia and contains an ample Miocene record, which includes Lower Miocene fine-grained strata and Middle Miocene to Pliocene coarsening-up strata. Our study presents a new data set that …

Study Of Legionella Pneumophila Treatment With Copper In Drinking Water By Single Cell-Icp-Ms, Lei Xu, Austin Sigler, Anna Chernatynskaya, Lindsey Rasmussen, Jingrang Lu, Endalkachew Sahle-Demessie, David J. Westenberg, Hu Yang, Honglan Shi

Biological Sciences Faculty Research & Creative Works

Legionella pneumophila is a persistent opportunistic pathogen that poses a significant threat to domestic water systems. Previous studies suggest that copper (Cu) is an effective antimicrobial in water systems. A rapid and sensitive quantification method is desired to optimize the conditions of L. pneumophila treatment by Cu and to better understand the interaction mechanisms between Cu and cells. In this study, we developed a highly sensitive single cell (SC)-ICP-MS method to monitor L. pneumophila cell concentration and track their uptake of Cu. The SC-ICP-MS method showed excellent sensitivity (with a cell concentration detection limit of 1000 cells/mL), accuracy (good agreement …

Cyberphysical Systems And Energy: A Discussion With Reference To An Enhanced Geothermal Process, Keshav Kasturi Rangan, Henrique Oyama, Ilham Azali Assoumani, Helen Durand, K.Y. Simon Ng

Chemical Engineering and Materials Science Faculty Research Publications

As cyberphysical systems research advances, energy systems will be able to benefit from the developments. In this section, we discuss several points in two newer areas for cyberphysical systems research in chemical engineering: 1) cybersecurity of process control systems; and 2) quantum computation of control actions. The discussion is presented in a general manner, with relevance to flow systems or under traditional control laws (e.g., proportional control). However, to showcase energy systems relevance, we will provide links, at intervals, between the developments discussed and enhanced geothermal systems with energy production through the Organic Rankine Cycle (ORC).

Descriptive Systematics Of Upper Palaeocene–Lower Eocene Pollen And Spores From The Northern Niger Delta, South-Eastern Nigeria, Luke Mander, Carlos Jaramillo, Francisca Oboh-Ikuenobe

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Fossil pollen and spores are a vital source of information on the geological history of tropical vegetation including reconstructions of vegetation diversity and composition. However, such work relies on a sound taxonomic framework, and this is challenging to achieve because of the large number of pollen and spore morphotypes that are encountered in palynological preparations from tropical sediments. In tropical West Africa, for example, extensive taxonomic work on Cretaceous–Paleogene pollen and spores was undertaken in the later part of the twentieth century, but more recent palynological work has focused on stratigraphy and basin evolution, and there is a need for …

An Experimental Study On The Mechanical Properties And Chemical Composition Of Lcd 3d Printed Specimens, Sebastian Gomez

College of Graduate Studies: Theses & Dissertations

Additive manufacturing technologies have been enhanced throughout the years yet have surprised the manufacturing industry due to their high-end surface finish and dimensional accuracy. Different experiments have been done to identify a specific phenomenon known in the vat-polymerization field. Distortion and dimensional inaccuracy tend to affect the overall properties of the process, either physical or chemical. This approach allows the understanding of how the physical properties have been affected and how to study the chemical properties to avoid this type of phenomenon. The chemical reaction between polymer and UV light has been studied and experimented with to the point that …

Carbon Dioxide And Steam Gasification Of Biochar: A Study On Mitigating Greenhouse Gas Emissions And Producing Syngas For Downline Synthesis Of Renewable Hydrocarbon Fuel, Parth Patel

College of Graduate Studies: Theses & Dissertations

This research explores the potential of mitigating CO₂ emissions from fossil fuel consumption and providing an alternative renewable source of energy by gasifying biochar with carbon dioxide (CO₂) and steam (H₂O). The utilization of captured carbon dioxide and wastewater in industrial sectors is considered to further contribute to the advancements in energy-efficient and low-emission technological solutions. This research evaluated the performance and kinetic parameters of biochar gasification through CO₂ and H₂O gasification using a stainless-steel fixed bed reactor. The operating parameters including biochar mass, reactor temperature, and inlet flow rate were varied. …

Sedimentological And Geochemical Characterization Of A Varved Sediment Record From The Northern Neotropics, Edward Duarte, Jonathan Obrist-Farner, Susan R.H. Zimmerman, Erik T. Brown, Robert Brown

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Annually resolved sedimentological records (including annual varves) can be used to develop precise chronologies for key climatic and tectonic events. Varved records, however, are most common in high latitude lakes, resulting in a spatial bias with respect to annually resolved records in tropical regions. Here we report on the sedimentology of two sediment cores from Lake Izabal, eastern Guatemala, that contain a well-preserved thinly laminated section spanning ca. 2200 years of the mid-Holocene. We integrate radiocarbon age-depth modeling, sedimentological observations, laminae counting, µX-ray fluorescence scanning, and multivariate statistical analyses to constrain the nature and chronology of the laminations. Our sedimentological …

Laboratory Investigation Of Regained Rock Permeability Using High Viscosity Friction Reducer In Comparison To Linear Guar Fracture Fluids, Ghith Biheri, Abdulmohsin Imqam

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Hydraulic fracturing is a method employed for extracting oil and gas from unconventional reservoirs by pumping a mixture of water, sand, and additives into the reservoirs to fracture oil formations. A high viscosity friction reducer (HVFR) based on polyacrylamide is a popular chemical that has been employed recently during hydraulic fracturing treatments to help transport proppant and to reduce friction. However, the use of HVFRs at high concentrations, especially in regions with high concentration levels of total dissolved solids (TDS), has raised concerns over the possibility of formation damage. In this research, a new type of HVFR was investigated for …

Microcrystalline Dolomite In A Middle Permian Volcanic Lake: Insights On Primary Dolomite Formation In A Non-Evaporitic Environment, Xin Jiao, Yi Qun Liu, Wan Yang, Hong Li, Zi Yuan Meng, Min Ru Zhao, Zhe Xuan Li

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Lacustrine dolomite nucleation commonly occurs in modern and Neogene evaporitic alkaline lakes. As a result, ancient lacustrine microcrystalline dolomite has been conventionally interpreted to be formed in evaporitic environments. This study, however, suggests a non-evaporitic origin of dolomite precipitated in a volcanic–hydrothermal lake, where hydrothermal and volcanic processes interacted. The dolomite occurs in lacustrine fine-grained sedimentary rocks in the middle Permian Lucaogou Formation in the Santanghu intracontinental rift basin, north-west China. Dolostones are composed mainly of nano-sized to micron-sized dolomite with a euhedral to subhedral shape and a low degree of cation ordering, and are interlaminated and intercalated with tuffaceous …

Repeatability Of Alkanolamines In Carbon Dioxide Capture After Mineralization, Titiwut Sirima

Chulalongkorn University Theses and Dissertations (Chula ETD)

The mineralization reaction between alkanolamines solution loaded with CO2 and calcium ions (Ca2+) produced calcium carbonate precipitate under an ambient condition, which reduced energy for thermal regeneration of alkanolamines solution. This work represented alkanolamines as monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). In addition, calcium chloride (CaCl2), calcium sulphate (CaSO4) and calcium hydroxide (Ca(OH)2) were used as calcium sources. Utilization of calcium hydroxide (Ca(OH)2) as a calcium source in the mineralization reaction resulted in the supernatant retaining its ability to capture carbon dioxide over 89%, which is similar to thermal regeneration. The mineral regeneration and the thermal regeneration can regenerate …

Utility Optimization Via Multi-Section Heat Integration Approach For Multi-Period Operations, Ariyachai Silprasert

Chulalongkorn University Theses and Dissertations (Chula ETD)

Heat Exchanger Network (HEN) optimization is essential for achieving utility conservation and minimizing the Total Annual Cost (TAC) by maximizing heat recovery between process streams. This study investigates on single and multi-section heat integration within a caprolactam (CPL) plant, conducted in collaboration with a petrochemical company. The investigation comprehensively addresses multi-period operations, considering production rate variability at 60%, 80%, and 100% loads. This variability is due to fluctuating operating conditions influenced by economic factors, as well as start-up and shut-down schedules. This work utilizes process simulation namely Aspen Plus and establishes HEN solutions using Aspen Energy Analyzer (AEA) and conventional …

Techno-Economic Analysis Of Dimethyl Ether Production Via Direct Hydrogenation Of Co2, Boonyasit Farkham

Chulalongkorn University Theses and Dissertations (Chula ETD)

To achieve carbon neutrality by 2050, alternative and sustainable fuels are receiving significant attention. One of the interesting options is dimethyl ether (DME), which can be synthesized from CO2. This research aimed to simulate DME production from CO2 by comparing indirect synthesis (two-step process) and direct synthesis (one-step process) methods. This study found that the one-step process had negative net CO2 emissions, with values of -1.16 tons CO2 per ton of DME. It also consumed less energy compared to that of the two-step process. This was because the amount of methanol generated in the two-step process was higher than in …

วัสดุผสมขั้นสูงของไบโอชาร์และโครงสร้างโลหะอินทรีย์ (Mofs) สำหรับการเก็บไฮโดรเจน, แซมสัน บามิเดเล อาคินโดเย

Chulalongkorn University Theses and Dissertations (Chula ETD)

การพึ่งพาเชื้อเพลิงฟอสซิลในยุคอุตสาหกรรม โดยเฉพาะอย่างยิ่งสำหรับการขนส่ง ส่งผลให้การปล่อยก๊าซเรือนกระจก (GHG) เพิ่มขึ้นอย่างมาก ซึ่งมีส่วนทำให้เกิดการเปลี่ยนแปลงสภาพภูมิอากาศ การจัดการกับปัญหาสิ่งแวดล้อมนี้จำเป็นต้องมีแนวทางแก้ไขที่เป็นนวัตกรรมเพื่อลดการพึ่งพาเชื้อเพลิงแบบเดิมๆ การศึกษานี้มุ่งเน้นไปที่การพัฒนาวัสดุคอมโพสิตขั้นสูงที่ประกอบด้วยถ่านชีวภาพและกรอบโลหะ-อินทรีย์ (MOF) เพื่อการจัดเก็บไฮโดรเจนอย่างมีประสิทธิภาพ เพื่อลดการใช้เชื้อเพลิงฟอสซิลและผลกระทบต่อสิ่งแวดล้อม เราประเมินวัสดุแต่ละชนิด (ถ่านชีวภาพและ MOF) และส่วนประกอบของวัสดุเหล่านี้เกี่ยวกับความสมบูรณ์ของโครงสร้าง สัณฐานวิทยาของพื้นผิว ความพรุน การกระจายขนาดรูพรุน กลุ่มฟังก์ชันของพื้นผิว และความสามารถในการกักเก็บไฮโดรเจน ผลการศึกษาครั้งนี้สามารถปูทางไปสู่ความก้าวหน้าใหม่ๆ ในด้านวัสดุคอมโพสิตและกระทรวงการคลังเฉพาะทางสำหรับการจัดเก็บไฮโดรเจน ซึ่งส่งผลกระทบอย่างมีนัยสำคัญต่อความยั่งยืนและผลกระทบต่อสิ่งแวดล้อมของการขนส่งในอนาคต

Techno-Economic Analysis Of Pre-Treatment Methods For Monoethanolamine (Mea)Co2 Capture Process, Nida Isarapreeda

Chulalongkorn University Theses and Dissertations (Chula ETD)

Global warming is the increase in the earth's overall temperature due to human activities, primarily the burning of fossil fuels, leading to the greenhouse effect. Greenhouse gases cause temperatures to rise, lead to climate change, which encompasses alterations in weather patterns. In Thailand, the industries with significant greenhouse gas emissions include electricity generation, cement production, and steel production. To remove CO2 emissions, the carbon capture process is focused on this research. The Monoethanolamide (MEA) process stands out for its lowest capital investment cost due to its simplicity and minimal equipment requirements. SO2 and NOX can react with amine-based solvents used …

The Production Of Encapsulated Holy Basil Oil Powder Via Different Scales Of Spray Drying Process., Chanakarn Chungmarisakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

The spray drying process is widely utilized in food manufacturing and pharmaceuticals for products like seasoning powder, milk powder, and medicine. This research investigates the scale-up of the spray drying process from laboratory to commercial scale with maintaining the product characteristic. A key aspect of the study is the encapsulation technique applied to prolong the release of essential oils from holy basil, encapsulating the essential substances (liquid, suspension, or emulsion) in nanoparticle form with hot air flow. The study utilizes the Aspen program, incorporating mass and energy balance calculations for simulation. The results, assuming similar particle size, water evaporation per …

Process Design And Evaluation Of Value-Added Chemical Production From Crude Glycerol Obtained From Biodiesel Industry, Piyawan Thanahiranya

Chulalongkorn University Theses and Dissertations (Chula ETD)

Excessive glycerol, a major by-product of biodiesel industry, has been increasingly utilized as a platform chemical feedstock for production of value-added chemicals. Accordingly, this study aims to simulate the productions of propionic acid (PA), succinic acid (SA), and dihydroxyacetone (DHA) from glycerol via fermentation. For PA production, diluents and extractants as well as techniques in the back-extraction are investigated, whereas the techniques of reactive extraction and direct crystallization, as well as the use of dimethyl sulfoxide (DMSO) as an electron acceptor for SA production are investigated. Meanwhile, the effects of carbon source types and glycerol types on the DHA productivity …

Simulation And Optimization Of Waste Heat To Electricity Through Organic Rankine Cycles (Orcs): A Case Study In An Oil Refinery, Mohamed A. Sadek, Mamdouh A. Gadalla, Noran Shedid, Dina Ahmed, Hany A. Elazab

Chemical and Biochemical Engineering Faculty Research & Creative Works

Energy efficiency has become a global problem that is detrimental to the chemical industries technically, economically and to the environment. Organic Rankine Cycle (ORC) is a promising technology that can solve this problem by recovering heat from low-grade waste heat sources by using organic working fluids. The heat source for the ORC system used in this article is air leaving air coolers in an oil refinery with a temperature of 140o C. The heat exchanger data for this refinery was used in the simulation of a basic cycle and a regenerative cycle using ASPEN HYSYS V.10. These ORC systems were …