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- Pyrolysis (6)
- Biochar (4)
- Biomass (4)
- Fluid Coking (4)
- Fluidized bed (4)
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- Hydrodynamics (4)
- Activated carbon (3)
- Agglomerates (3)
- Fluid CokingTM (3)
- Lignin (3)
- Radioactive Particle Tracking (3)
- Soil amendment (3)
- Acoustic emissions (2)
- Adsorption (2)
- Agglomeration (2)
- Aluminosilicates (2)
- Aspirin (2)
- Batch (2)
- Bed material (2)
- Bio-oil (2)
- Biohydrogen (2)
- Bubbling fluidized bed (2)
- Cocrystal (2)
- Crystallization (2)
- Drinking water (2)
- FTIR (2)
- Fluid coking (2)
- Fluidized Bed (2)
- Fractional condensation (2)
- Furfural (2)
Articles 1 - 30 of 92
Full-Text Articles in Engineering
Upgrading Of Vapors And Gases From Pyrolysis To Valued Added Gaseous Products, Ivan Santiago
Upgrading Of Vapors And Gases From Pyrolysis To Valued Added Gaseous Products, Ivan Santiago
Electronic Thesis and Dissertation Repository
This MSc thesis explores biomass pyrolysis and reforming, aiming to convert biomass-derived vapors into useful gases for synthesis and fuel. The study focuses on transforming high molecular weight molecules, like polycyclic aromatic hydrocarbons, and volatile organic molecules such as acids, alcohols, and other substances formed during pyrolysis into essential gases like hydrogen, methane, carbon monoxide, and carbon dioxide.
A dual-reactor system is employed: a CSTR for primary pyrolysis, followed by a PFR or PBR for secondary catalytic processing. Olivine is used as the catalyst.
The research compares three gas upgrading methods: thermal cracking, catalytic cracking, and catalytic steaming (reforming).
Results …
Scale-Up And Measurement Enhancements Of A Biogenerator Bioreactor, Jason J. Glas
Scale-Up And Measurement Enhancements Of A Biogenerator Bioreactor, Jason J. Glas
Electronic Thesis and Dissertation Repository
Renewable energies in the form of wind and solar have seen steadfast growth across the world, however the abundance of these technologies that demonstrate short-term variability in power output threatens power grid stability and necessitates the use of fossil fuels for rapid throttling capability. A requirement for large scale energy storage systems becomes necessary and a system based on hydrogen generation, storage, and consumption for electrical grid supply-demand stabilization using a ferric sulfate oxidant is herein explored, named the BioGenerator. As the name implies, the system functions as an indirect microbial fuel cell using a biologically active broth dominated by …
Design Of Active Pharmaceutical Ingredients Solid States In Crystallization Processes, Weizhong Gong
Design Of Active Pharmaceutical Ingredients Solid States In Crystallization Processes, Weizhong Gong
Electronic Thesis and Dissertation Repository
Crystallization is an important technique to obtain solid-state drugs from solutions. Physicochemical properties of the active pharmaceutical ingredients (APIs) are determined by crystallization. More than half of the active pharmaceutical ingredients exhibit polymorphism, the phenomenon of chemical species showing more than one unit-cell structure in the solid state. Controlling polymorphism is one of the most important goals during pharmaceutical manufacturing. Nevertheless, the control of polymorphism is sometimes not enough to realize the targeted physicochemical properties. Suitable additives (coformers/salt formers) are explored to generate new multi-component solid phases of poorly soluble/bioavailable active pharmaceutical ingredients (APIs). The design of pharmaceutical cocrystals and …
Application Of Crystal Engineering In Multicomponent Pharmaceutical Crystals: A Study Of Theory And Practice, Soroush Ahmadi Nasrabadi
Application Of Crystal Engineering In Multicomponent Pharmaceutical Crystals: A Study Of Theory And Practice, Soroush Ahmadi Nasrabadi
Electronic Thesis and Dissertation Repository
Multicomponent crystallization, a prominent strategy in crystal engineering, offers the ability to modify the physicochemical properties of crystals by introducing a secondary component to their lattice structure. Such multicomponent crystals have found widespread application in the pharmaceutical industry. This thesis explores the experimental screening, characterization, application, and theoretical prediction of multicomponent crystals of Active Pharmaceutical Ingredients (APIs).
The first case study investigates a new solvate of Dasatinib which exhibits high instability at room temperature and transforms into a different polymorph upon desolvation. The crystal structure of this compound is obtained, revealing insights into its transient nature and the potential application …
Hydrothermal Liquefaction (Htl) Of Lignocellulosic Biomass For Biocrude Production: Reaction Kinetics And Corrosion-Resistance Performance Of Candidate Alloys For Reactors, Haoyu Wang
Electronic Thesis and Dissertation Repository
In recent years, the rapid increase in the demand for clean energy and green chemicals as well as concerns over the supply and environmental impacts associated with fossil. resources have stimulated intensive research on conversion of bioresources, such as lignocellulosic biomass and biowaste, into energy, fuels, chemicals, and materials.
Hydrothermal liquefaction (HTL) is a unique thermochemical conversion process, particularly applicable for the conversion of wet biomass and biowaste feedstocks. Most of the biomass HTL studies are conducted in batch reactor and focus on the effects of catalysts, reaction temperature and time on production efficiency and chemical properties of the products. …
Production Of Cellulose-Based Superabsorbent Polymers For Soil Water Retention, Rosa Maria Arredondo Ramirez
Production Of Cellulose-Based Superabsorbent Polymers For Soil Water Retention, Rosa Maria Arredondo Ramirez
Electronic Thesis and Dissertation Repository
Superabsorbent polymers (SAPs) have attracted tremendous attention, with researchers noting that their high water absorption capacity (AC) is valuable for various applications, especially in agricultural contexts. Two types of materials can be used to produce SAPs: fossil-based (which are harmful to the environment) and bio-based (which are significantly more environmentally friendly, given their biodegradability and minimal toxic side effects). Although bio-based SAPs (Bio-SAPs) are preferable due to their environmental merits, their preparation tends to be time consuming and labour intensive, and their AC is still far below expectations. To address these problems, a novel, eco-friendly, cellulose-based superabsorbent polymer (Cellulo-SAP) was …
Highly Efficient De-Lignification And Reengineering Approach To Modify Wood Into A Bio-Composite And An Adsorbent Material, Ramon Filipe Beims
Highly Efficient De-Lignification And Reengineering Approach To Modify Wood Into A Bio-Composite And An Adsorbent Material, Ramon Filipe Beims
Electronic Thesis and Dissertation Repository
In this doctoral study, high-value bio-based materials, including a light-weight and high-strength wood-based composite material and a bio-based adsorbent material for removal of heavy metals in water, were developed from natural wood by a novel reengineering approach. In this approach, natural wood was first fractionated into a porous de-lignified wood and lignin. The porous de-lignified wood was then composited by impregnation of an epoxy resin synthesized with the lignin extracted from wood.
The wood-based composite preparation consisted of three main steps: (i) de-lignification of natural wood, (ii) lignin modification and epoxidation, and (iii) impregnation of the de-lignified wood with lignin-based …
Identification And Distribution Analysis Of The Mid-Phase In A Low-Velocity Gas-Solid Fluidized Bed, Zhenan Zhang
Identification And Distribution Analysis Of The Mid-Phase In A Low-Velocity Gas-Solid Fluidized Bed, Zhenan Zhang
Electronic Thesis and Dissertation Repository
The intermediate phase in low-velocity gas-solid fluidized beds generally presents excellent gas-solid contact in the systems. However, no comprehensive understanding of this vital phase is available in the literature. Therefore, this study proposed a statistical method to identify this intermediate phase, named ‘mid-phase’ in this thesis, to interpret the system performance based on the analysis of solids holdup in a low-velocity gas-solid fluidized bed.
The distributions of the mid-phase are investigated along both radial and axial directions in consideration of different flow regimes. The result shows that the turbulent regime contains a higher amount of mid-phase and the spatial mid-phase …
Development Of A Cold Model Fuild Coker Pilot Plant, Jessica A. Godin
Development Of A Cold Model Fuild Coker Pilot Plant, Jessica A. Godin
Electronic Thesis and Dissertation Repository
Fluid CokingTM is an upgrading process used to produce higher-value products from heavy hydrocarbons through thermal cracking. A Hot Pilot Plant is being designed for potential use to optimize commercial Fluid Cokers.
A Cold Model Fluid Coker was operated in this thesis to identify design limitations restricting operation at the required conditions. Design changes were implemented, and their impact on the system fluid dynamics were characterized. Successful operation of at required conditions was demonstrated.
Pressure measurements provided rapid feedback on potential issues. Models for bed expansion and entrainment flux were developed, which can be used to extrapolate to the …
Co-Gasification Of Biomass And Plastic Waste In A Bubbling Fluidized Bed Reactor, Islam Elghamrawy
Co-Gasification Of Biomass And Plastic Waste In A Bubbling Fluidized Bed Reactor, Islam Elghamrawy
Electronic Thesis and Dissertation Repository
Plastics are versatile, durable, and can be manipulated to match different needs. The COVID-19 pandemic has demonstrated the importance of reducing plastic waste and is believed to be responsible for increasing the generation of plastic waste by 54,000 tons/day which was reported in 2020. Another widely available waste is biomass waste. Agriculture and agroforestry, forest and wood processing, municipal waste, and the food industry are all considered major producers of biowaste. Co-gasification is considered one of the most promising methods of chemical recycling that targets the production of syngas (hydrogen and carbon monoxide) and light hydrocarbon gases. In this study, …
Thermochemical Conversion Of Plastic To Value Added Products, Anastasia L. Maslak
Thermochemical Conversion Of Plastic To Value Added Products, Anastasia L. Maslak
Electronic Thesis and Dissertation Repository
In this study, the use of pyrolytic cracking for managing non-recyclable plastic waste by conversion into value-added liquid and gaseous products was investigated. A single-stage reactor and a novel, two-stage reactor set-up were used for experiments involving polyethylene and polypropylene. Parameters including feedstock composition, feed rate, temperature and residence time were studied. The two-stage approach was investigated to overcome existing transportation limitations involved in the typical plastic waste lifecycle. Bulky plastic collected in towns and cities must be transported to industrial facilities typically located elsewhere for reprocessing. Both HDPE and LDPE showed promising results for olefin recovery with ethylene gas …
Investigation Of Electrochemical And Hybrid Microbial Desalination Cells For Environmental Applications, Shawn Nicholas Hamilton
Investigation Of Electrochemical And Hybrid Microbial Desalination Cells For Environmental Applications, Shawn Nicholas Hamilton
Electronic Thesis and Dissertation Repository
ABSTRACT
Road salt is a global problem especially in cold countries that are focused on road safety in urbanized and big cities. On an average approximately 5 million tonnes of road salt is applied on Canadian highways annually. Road salt impacts aquatic ecosystems, bridges, buildings and corrodes metal structures. Therefore the treatment of road salt is important and needs to be studied.
In this study, a batch lab-scale 3-compartment electrochemical desalination cell was invented and studied to reduce NaCl(aq) (model of road salt) through the utilization of NaBH4/H2O2 redox reaction. Using of several commercial …
Impact Of Local Fluidized Bed Hydrodynamics On The Distribution Of Liquid Sprayed Into The Bed, Yuan Li
Impact Of Local Fluidized Bed Hydrodynamics On The Distribution Of Liquid Sprayed Into The Bed, Yuan Li
Electronic Thesis and Dissertation Repository
In Fluid Coking, heavy oil is sprayed into a fluidized bed of hot coke particles that provide heat for the reaction and vaporization of the products, using nozzles located at different radial and axial locations of the reactor. In industrial units, imperfect initial liquid-solid contact results in the formation of wet agglomerates, which have been shown to cause fouling of the stripper sheds.
This thesis aims to reduce agglomerate formation by modifying the bed hydrodynamics in the spray region by adjusting the initial fluidization gas distribution or using a baffle.
Experimental methods were developed to study local gas flow, solids …
Mitigation Of Fouling And Liquid Losses In A Fluid Coker™: Influence Of Operating Conditions And Internals On Wet-Agglomerates Contribution To Liquid Carry-Under, Yohann Alain François Cochet
Mitigation Of Fouling And Liquid Losses In A Fluid Coker™: Influence Of Operating Conditions And Internals On Wet-Agglomerates Contribution To Liquid Carry-Under, Yohann Alain François Cochet
Electronic Thesis and Dissertation Repository
In Fluid Cokers, heavy oil is sprayed into a fluidized bed of hot particles through feed ring nozzles located at different heights. Unreacted or partially reacted feedstock, trapped in wet‑agglomerates, reaches the reactor bottom where it causes fouling or is lost to the system burner. The thesis objective is to determine whether modifying the feed distribution between rings or adding baffles can reduce the amount of liquid reaching the reactor bottom.
A model was developed to predict the amount of liquid reaching the reactor bottom. It integrates models for agglomerate formation and rewetting in spray jets, agglomerate drying through heat …
A Multifunctional Treatment Process For Combined Sewer Overflow Pollutants And Nutrient Control, Tiziana Venditto
A Multifunctional Treatment Process For Combined Sewer Overflow Pollutants And Nutrient Control, Tiziana Venditto
Electronic Thesis and Dissertation Repository
Combined sewer overflows (CSOs) contain a highly variable, wide range of contaminants, both in particulate and soluble form, making conventional water treatment processes unable to offer adequate public health protection. To date, no study proposed an efficient and cost-competitive treatment able to remove a broad spectrum of CSO pollutants. This research demonstrated that a chemical pre-treatment, followed by micro-sieve filtration and UV disinfection is an efficient and cost-competitive treatment for CSOs. Pollutant removal was achieved by first adsorbing soluble pollutants on zeolite and powdered activated carbon, and subsequently applying filtration carried out by polymer-enhanced microsieving. Optimal treatment condition, consisting of …
Using Ionic Liquids In Fabrication Of Vo2 For Thermochromic Coatings, Shidokht Nazari
Using Ionic Liquids In Fabrication Of Vo2 For Thermochromic Coatings, Shidokht Nazari
Electronic Thesis and Dissertation Repository
Energy-efficient or smart windows are an important part of net zero energy housing as excellent candidates for energy conservation. They can control the amount of light and heat passing through them in response to an external stimulus such as heat (thermochromic) or electricity (electrochromic). Vanadium Oxide (VO2) is a potential thermochromic material to provide an automatic reversible semiconductor-metal phase transition from the monoclinic structure to tetragonal at 68 °C. However, there remain major challenges in fabricating desirable VO2-based films to meet the requirements for large-scale implementation. Mainly, the phase transition temperature (Tc) should …
Probing The Role Of Silicates For Corrosion Control In Lead Plumbing, Hailey Holmes
Probing The Role Of Silicates For Corrosion Control In Lead Plumbing, Hailey Holmes
Electronic Thesis and Dissertation Repository
Lead service lines and fittings were installed in Canada's drinking water networks until 1986 and currently pose severe health risks. As pipes corrode over decades of use, lead is released into drinking water resulting in dangerous exposure to elevated lead levels. Sodium silicates can be used for corrosion control of lead, however a basic understanding of how they work is lacking. This thesis describes the results of experiments conducted to determine how silicates interact with lead and aluminum in drinking water, using microscopic and spectroscopic techniques. The results show the presence of silicates inhibited Pb2+ carbonates from oxidizing into …
Production Of Engineered Carbons From Secondary Waste Streams For Environmental Applications, Ghazaleh Chegini
Production Of Engineered Carbons From Secondary Waste Streams For Environmental Applications, Ghazaleh Chegini
Electronic Thesis and Dissertation Repository
Pyrolysis and activation were used in this thesis to produce biochar and activated carbon from industrial digestate and hydrochar materials. In the first part of thesis, digestate derived biochars were obtained by varying the pyrolysis heating rate (10, 80, 100, 200, >1000 °C·min-1) and temperature (300 to 600 °C) to modify their soil-related characteristics (i.e., nutrient leachability, carbon stability, and heavy metal adsorptive capacity). The biochar produced at a temperature of 500 °C and heating rate of 10 °C·min-1 was also activated under using CO2 at 800 °C with different holding times (0.5-2 h). Results indicated …
Numerical Study Of The Effect Of Gas Distributors And Baffles On The Bubble Distribution, Gas And Solid Mixing In A Fluidized Bed, Xuelian Xing
Electronic Thesis and Dissertation Repository
In this study, the multi-phase Eulerian-Eulerian two-fluid method (TFM) coupled with the kinetic theory of granular flow (KTFG) was used to investigate hydrodynamics of particle flows (Geldart Group B) in a lab-scale fluidized bed Geldart Group B particles, operating in bubbling and turbulent regimes. The effect of gas distributors and baffles on the distribution of the gas bubbles, and the mixing of gas and solids were investigated under various superficial gas velocities.
The numerical model is validated by experimental results from two different measurement methods with various gas distributor configurations and a superficial gas velocity ranging from 0.4 m/s to …
Waste Hemp Fibers (Hfs) Derived Porous Carbons: Preparation, Characterization, And Potential Applications, Manju Gurung
Waste Hemp Fibers (Hfs) Derived Porous Carbons: Preparation, Characterization, And Potential Applications, Manju Gurung
Electronic Thesis and Dissertation Repository
The main objective of the present research was to develop environmentally friendly and cost-effective porous carbon materials of improved properties from waste hemp fibers. Two different types/categories of porous carbons were prepared from hemp fibers. In one type, porous carbon materials were developed by a simple one-step method of carbonization and activation. The other type of carbon materials developed in this study were nitrogen-containing activated carbons, which were developed by introduction of nitrogen-containing functional groups on the surface of hemp fibers followed by activation and carbonization. The pore structure/distribution and surface chemistry of the prepared carbons were investigated through the …
Fluidization Characteristics Of Group C+ Particles: Fine Powder With Nanoparticle Modulation, Yandaizi Zhou
Fluidization Characteristics Of Group C+ Particles: Fine Powder With Nanoparticle Modulation, Yandaizi Zhou
Electronic Thesis and Dissertation Repository
Geldart Group C particles become increasingly attractive in industry because of their small particle sizes and large specific surface areas. The main challenge in the flow and fluidization of Geldart Group C particles is their cohesive nature due to strong interparticle forces. The “nanoparticle modulation” technique was adopted to reduce the interparticle forces of Group C particles and thus significantly improved their flow and fluidization quality. Group C+ particles, a new type of fine particles with drastically reduced or insignificant interparticle forces, were created using the nano-modulation technique.
Fundamental studies provided a comprehensive understanding of the fluidization quality of …
Improved Fermentation Design And Screening Devices For Biobutanol Production, Garret Christopher Munch
Improved Fermentation Design And Screening Devices For Biobutanol Production, Garret Christopher Munch
Electronic Thesis and Dissertation Repository
A worldwide increase in demand for renewable fuels has revived interest in fermentatively produced butanol. However, butanol fermentation suffers from low product yields and productivity. The work presented in this thesis addresses part of these research and development needs at three levels: innovative fermentation process design; genetic manipulation for strain enhancement; and the development of a new tool for anaerobic process characterization and optimization.
Product yield could be increased through traditional fermentation engineering. Co-fermentation of butyric acid with glycerol increased the butanol yield from 0.45 mol/mol (mols C in butanol / mol C in substrates) to 0.51 mol/mol. In building …
Bubble Dynamics In A Sand Fluidized Bed In The Presence Of Biomass Pellets, Nicolas Torres Brauer
Bubble Dynamics In A Sand Fluidized Bed In The Presence Of Biomass Pellets, Nicolas Torres Brauer
Electronic Thesis and Dissertation Repository
Given the worldwide concerns regarding fossil fuel availability, global warming, water, and air pollution and economy needs, there is an urgent requirement to develop and implement alternative energies. Biomass gasification can consume vegetal waste to produce syngas, which is a mix of carbon monoxide, hydrogen, and carbon dioxide. When biomass gasification is carried out in a fluidized bed, the process is highly efficient.
The experimental study of the present Ph.D. dissertation took place in a Plexiglas 0.44 m diameter unit, equipped with a CREC Optiprobe system and a video camera. The unit was filled with 200-900 µm sand particles and …
Improvement Of Fluidization Ability For Group A Powders By Fine Powder Additives, Xiaowei Zhang
Improvement Of Fluidization Ability For Group A Powders By Fine Powder Additives, Xiaowei Zhang
Electronic Thesis and Dissertation Repository
Group A powders are widely utilized in the industry because of the great quality of fluidization, which can be affected by the fine content. This project investigates the feasibility that employing the fine powders (≤ 20 μm) as additives to further improve the fluidization ability of Group A powders. Three additives, Coal-15, GB-6, and SiO2-5 are added into FCC-76, based on various volume fractions. The minimum fluidization velocity (Umf), bed expansion ratio (BER), and dense phase expansion ratio (DER) are tested to evaluate the quality of fluidization. Coal-15 can slightly improve the fluidization quality. High …
Effects Of Drinking Water Treatment Processes On Removal Of Algal Matter And Subsequent Water Quality, Ziming Zhao
Effects Of Drinking Water Treatment Processes On Removal Of Algal Matter And Subsequent Water Quality, Ziming Zhao
Electronic Thesis and Dissertation Repository
Seasonal algal blooms in drinking water sources have increased significantly over the recent past as a result of increased temperature and nutrient loading in surface water due to agricultural and surface runoff. More than 95% of algal cells can be removed by coagulation and flocculation processes. However, algal organic matter (AOM) is not removed well during coagulation, thus causes several operational challenges in drinking water treatment. This research was conducted to investigate the effectiveness of coagulation, granular activated carbon adsorption, and filtration processes on AOM removal and to evaluate disinfection by-products formation potential with/without UV irradiation.
Initially, coagulation performance for …
Rotating Heater Pyrolyzer (Rhp): A New Pyrolysis Technology For Biochar Production, Ariel Porat
Rotating Heater Pyrolyzer (Rhp): A New Pyrolysis Technology For Biochar Production, Ariel Porat
Electronic Thesis and Dissertation Repository
Biochar provides an effective and inexpensive carbon sequestration technology to combat climate change. It is formed through a process known as pyrolysis; where biomass is thermally decomposed in the absence of oxygen. In this study, a new pyrolysis reactor called the Rotating Heater Pyrolyzer (RHP) was designed and built for biochar production. RHP derived biochar properties were compared to biochars produced with a standard batch pyrolysis reactor (Pyrolytic Shaker Reactor (PSR)) to determine RHP performance. Using several biochar characterization techniques, the soil amendment potential of two solid anaerobic digestate feedstocks were investigated. Woodchip RHP derived biochar processed between 2-3 hrs …
A Comprehensive Study Of Sequential Simulated Moving Bed: Purification Of Xylo-Oligosaccharides And Fructose-Glucose, Yan Li
Electronic Thesis and Dissertation Repository
Chromatographic separation is a promising alternative for separation and purification of sugars in industry. Simulated moving bed (SMB) technique has been proven as an efficient chromatographic separation method due to its enhanced productivity and purity, reduced solvent consumption, convenient operating control, and improved separation performance for some systems with low resolution and selectivity. The sequential simulated moving bed (SSMB) is a modification of the conventional SMB process, which currently has some applications for sugar separation due to its low solvent consumption. This work mainly investigates the design strategy of the innovative SSMB process and explore its advantages and disadvantages over …
Development Of A Co-Rotating, Fully Intermeshing Twin-Screw Extruder Model For The Extrusion Of Natural Fibre Suspensions, Keller J H George
Development Of A Co-Rotating, Fully Intermeshing Twin-Screw Extruder Model For The Extrusion Of Natural Fibre Suspensions, Keller J H George
Electronic Thesis and Dissertation Repository
Twin-screw extruders are continuous processing devices that have been used in many industries concerned with the processing of multiphase fibrous suspensions, such as the food and pulping industries. While these devices offer great flexibility due to their modularity and customizability, optimization for specific applications can be challenging due to the unavailability of reliable, global models with accurate predictive capabilities. Consequently, this work seeks to eliminate this knowledge gap with the development of a novel global, composite model capable of predicting key process outputs for suspension-processing, phase-separating, co-rotating, fully-intermeshing twin-screw extruders. Creation of the novel global algorithm involved the modification of …
Hydrodynamics Studies Of Air Dense Medium Fluidized Bed With Binary Mixtures For Dry Coal Beneficiation, Zhijie Fu
Electronic Thesis and Dissertation Repository
A systematic and comprehensive study of fluidization hydrodynamics and separation properties was conducted in a bench-scale and a semi-industrial Air Dense Medium Fluidized Bed (ADMFB) systems for dry coal beneficiation. In order to achieve the adjustment of fluidized bed density for efficient dry gravity separation, various types of binary mixtures of solid particles were tested and used as the medium materials in ADMFB. Fluidization hydrodynamics including minimum fluidization velocity, fluidized bed expansion, solids mixing/segregation, and bed density distribution were carefully investigated. A series of continuous experiments of raw coal dry beneficiation were successfully implemented in a semi-industrial ADMFB system with …
Application Of Electrostatic Dry Powder Coating Technology On Hard Capsules, Zhehao Jing
Application Of Electrostatic Dry Powder Coating Technology On Hard Capsules, Zhehao Jing
Electronic Thesis and Dissertation Repository
This project applied electrostatic dry powder coating technology on hard gelatin and HPMC capsules using Eudragit® RS/RL and Eudragit® L 100-55 to achieve sustained release and enteric release respectively. Dry powder coating eliminated the difficulties associated with conventional liquid coating processes such as poor adhesion and stickiness for capsules. Additionally, through optimizing sprayed plasticizer volume, the coating powders deposited on the capsules could be efficiently maximized. The weight gain of coating and the formulation of coating materials were important parameters which controlled the release profiles of coated capsules. The release mechanism of coated capsules was quite different from …