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Articles 451 - 480 of 687
Full-Text Articles in Chemical Engineering
Aerosol Technology For Carbon Capture And Utilization, Onochie Chinedum Okonkwo
Aerosol Technology For Carbon Capture And Utilization, Onochie Chinedum Okonkwo
McKelvey School of Engineering Graduate Student Theses & Dissertations
The CO2 concentration in the atmosphere has continued to increase over the past century and now poses an increasing potentially catastrophic effect to human life and the environment via global warming and the concomitant effect of climate change. Anthropogenic carbon dioxide emissions due to fossil fuel combustion for increasing energy demand is the main driver for the increased carbon dioxide in the atmosphere. A multifaceted approach including carbon dioxide capture and utilization is required to mitigate anthropogenic carbon dioxide emissions. Aerosol science and technology, an enabler for clean combustion technologies and nanomaterial synthesis, can contribute significantly to the advancement of …
Enhancing Oil Recovery With Novel Nano-Particle-Infused Surfactant Biopolymer Composite: A Comprehensive Investigation, Attia Attia, Amira Shafaay Dr., Michael Sami Alfonse Eng., George Azmi Eng., Rania Ramadan
Enhancing Oil Recovery With Novel Nano-Particle-Infused Surfactant Biopolymer Composite: A Comprehensive Investigation, Attia Attia, Amira Shafaay Dr., Michael Sami Alfonse Eng., George Azmi Eng., Rania Ramadan
Petroleum Engineering and Gas
The oil industry worldwide is searching for a new way to increase oil recovery. Chemical flooding has been used worldwide to improve oil recovery. In this research, the study of Enhanced Oil Recovery was carried out by using an Egyptian oil of API 42◦; the experiments were done by using Xanthan biopolymer (XG) gum with sodium dodecylbenzene sulfonate (SDBS) as a composite for the EOR process and studying the impact of different composite concentrations on oil recovery. Design Expert software was used to determine the optimum concentrations of the composite. 500 ppm concentration of graphene cobalt samarium ferrite nanoparticles (NP) …
Metabolite Analysis To Understand Factors Limiting Microbial Fermentation At High Substrate Concentrations, Bishal D. Sharma
Metabolite Analysis To Understand Factors Limiting Microbial Fermentation At High Substrate Concentrations, Bishal D. Sharma
Dartmouth College Ph.D Dissertations
Clostridium thermocellum, a thermophilic anaerobic bacterium, holds promise as a biocatalyst for conversion of lignocellulosic biomass into biofuels. This microbe has been subjected to various metabolic engineering strategies, including the deletion of genes encoding secondary fermentation products such as H₂, formate, acetate, and lactate, as well as the expression of heterologous genes to redirect carbon flux toward ethanol production. Despite these efforts, achieving economically viable ethanol titers remains a challenge. We hypothesized that studying how intracellular metabolite concentrations change as fermentation stops could reveal metabolic bottlenecks or regulatory mechanisms limiting ethanol production at high titers. However, metabolomics studies at …
Enhancing Co₂ Sweep And Storage Efficiency: Development And Evaluation Of A Hydrogel For Co₂ Storage And Enhanced Oil Recovery, Maryaam Sharifi Paroushi, Baojun Bai
Enhancing Co₂ Sweep And Storage Efficiency: Development And Evaluation Of A Hydrogel For Co₂ Storage And Enhanced Oil Recovery, Maryaam Sharifi Paroushi, Baojun Bai
Miners Solving for Tomorrow Research Conference
No abstract provided.
Preliminary Assessment Of Non-Volatile Particulate Matter And Gaseous Emissions From A Premixed Pre-Vaporized Combustor Designed For Civil Supersonic Transport, Ugochukwu Ewuzie, Godwin Ifeanyi Ogbuehi, Steven Achterberg, Monday Uchenna Okoronkwo, Philip D. Whitefield
Preliminary Assessment Of Non-Volatile Particulate Matter And Gaseous Emissions From A Premixed Pre-Vaporized Combustor Designed For Civil Supersonic Transport, Ugochukwu Ewuzie, Godwin Ifeanyi Ogbuehi, Steven Achterberg, Monday Uchenna Okoronkwo, Philip D. Whitefield
Miners Solving for Tomorrow Research Conference
No abstract provided.
Carrier Analysis Of Alc Lipid Nanoparticles With Lung Cancer Drug, Noah Sparks, Lei Xu, Hu Yang
Carrier Analysis Of Alc Lipid Nanoparticles With Lung Cancer Drug, Noah Sparks, Lei Xu, Hu Yang
Miners Solving for Tomorrow Research Conference
No abstract provided.
Microplastics-Resistant Fo Membranes: Zwitterionic Mof Nanoparticles For Superior Fouling Control, Mitra Golgoli, Mohadeseh Najafi, Javad Farahbakhsh, Mehdi Khiadani, Michael L. Johns, Masoumeh Zargar
Microplastics-Resistant Fo Membranes: Zwitterionic Mof Nanoparticles For Superior Fouling Control, Mitra Golgoli, Mohadeseh Najafi, Javad Farahbakhsh, Mehdi Khiadani, Michael L. Johns, Masoumeh Zargar
Research outputs 2022 to 2026
The increasing contamination of water by microplastics (MPs) underscores the need for efficient tertiary treatments such as forward osmosis (FO). Developing advanced, low-fouling membranes is essential for enhancing FO system effectiveness. This work studies an innovative modification of FO membranes by the incorporation of a synthesized hybrid nanoparticle comprising metal-organic frameworks (MOFs) and sulfobetaine zwitterions into the thin layer of thin-film composite (TFC) membranes. The ZW/MOF (UiO-66-NH2), nanoparticles were synthesized using a post-synthetic free-radical copolymerization method, resulting in a uniform polymer shell around the MOF nanoparticles. The incorporation of ZW/MOF nanoparticles into the membranes enhanced the hydrophilicity of the membranes …
A High-Temperature Lithium-Aluminum Alloy/Oxygen Or Air Fuel Cell, Sarwan S. Sandhu
A High-Temperature Lithium-Aluminum Alloy/Oxygen Or Air Fuel Cell, Sarwan S. Sandhu
Chemical and Materials Engineering Faculty Publications
This paper is in support of our current effort in the development of an experimental hybrid (lithium- aluminum alloy/electrolyte/oxygen or air) fuel cell for the acquisition of the experimental data required to characterize its performance behavior. The literature-based assembled formulation provided in this paper can be used to predict the cell open-circuit electric potential, lithium amount in the cell anode alloy, and g-atom ratio of lithium to aluminum in the cell anode as a function of time at any cell discharge current level. The ohmic voltage losses can also be computed in the cell cathode, anode, and two electrolytes at …
The Interplay Between Endothelial Glycocalyx Maturity And Both The Toxicity And Intracellular Uptake Of Charged Nanoparticles, Claire A. Bridges, Lu Fu, Jonathan Yeow, Xiaojing Huang, Miriam Jackson, Rhiannon P. Kuchel, James D. Sterling, Shenda M. Baker, Megan S. Lord
The Interplay Between Endothelial Glycocalyx Maturity And Both The Toxicity And Intracellular Uptake Of Charged Nanoparticles, Claire A. Bridges, Lu Fu, Jonathan Yeow, Xiaojing Huang, Miriam Jackson, Rhiannon P. Kuchel, James D. Sterling, Shenda M. Baker, Megan S. Lord
Business and Information Technology Faculty Research & Creative Works
Nanoparticles are widely studied for delivering treatments to target tissues, but few have reached clinical use. Most nanoparticles encounter blood vessels on their way to target tissues. The inner surface of these vessels is lined with endothelial cells covered by a glycocalyx, an extracellular matrix rich in anionic glycans. The role of the glycocalyx in nanoparticle interactions is not well understood. Here, we demonstrate that endothelial cells need extended culture times to synthesize a mature glycocalyx. Our research shows that branched polyethyleneimine functionalized gold nanoparticles bind to endothelial cells expressing either a developing or mature glycocalyx, with the interaction involving …
The Effects Of Snow Cover On The Dynamic Pressure Of Nuclear Detonation Blast Waves, Adam Card, Andrew W. Decker
The Effects Of Snow Cover On The Dynamic Pressure Of Nuclear Detonation Blast Waves, Adam Card, Andrew W. Decker
Faculty Publications
Blast pressure is the primary military targeting metric for nuclear weapons. Any local conditions that affect blast pressure have the potential for altering nuclear plans, both from defensive and offensive standpoints. Understanding the impact of snow to the blast wave, therefore, provides a benefit both to military planners and to warfighters on the ground, for any operation occurring in arctic environments. No existing data provides a quantitative description of how snow on the ground affects a nuclear detonation blast wave passing over it. Similar blast waves passing over dust have experimentally proven to enhance blast pressure in a localized region.1 …
Ultrasonic Spray Coating Of Carbon Fibers For Composite Cathodes In Structural Batteries, Thomas Burns, Liliana Delatte, Gabriela Roman-Martinez, Kyra Glassey, Paul Ziehl, Monirosadat Sadati, Ralph E. White, Paul T. Coman
Ultrasonic Spray Coating Of Carbon Fibers For Composite Cathodes In Structural Batteries, Thomas Burns, Liliana Delatte, Gabriela Roman-Martinez, Kyra Glassey, Paul Ziehl, Monirosadat Sadati, Ralph E. White, Paul T. Coman
Faculty Publications
Structural batteries, also known as “massless batteries”, integrate energy storage directly into load-bearing materials, offering a transformative alternative to traditional Li-ion batteries. Unlike conventional systems that serve only as energy storage devices, structural batteries replace passive structural components, reducing overall weight while providing mechanical reinforcement. However, achieving uniform and efficient coatings of active materials on carbon fibers remains a major challenge, limiting their scalability and electrochemical performance. This study investigates ultrasonic spray coating as a precise and scalable technique for fabricating composite cathodes in structural batteries. Using a computer-controlled ultrasonic nozzle, this method ensures uniform deposition with minimal material waste …
Experimental And Numerical Analysis Of Fluidization Of Pelletized Activated Carbon Columns: Effects Of Glass Bead Retention Layer, Amin Nemati Tamar
Experimental And Numerical Analysis Of Fluidization Of Pelletized Activated Carbon Columns: Effects Of Glass Bead Retention Layer, Amin Nemati Tamar
Theses and Dissertations
In pressure swing adsorption (PSA) processes there is always a desire to process as much gas as possible in the smallest beds possible. This necessarily leads to velocities that, especially during pressure-changing steps, may exceed the adsorbent particle fluidization velocity within the bed. To prevent the possibility of bed expansion and fluidization bed retention systems are usually employed at the top of the bed in the form of dense beads, bags of the same or springs, otherwise the mechanical integrity of the adsorbent might become compromised. PSA process simulation, based on Archimedes’ force balance involving weight, buoyancy and the drag …
Multiscale Modeling Techniques For Electrodynamic Systems, Hunter Teel
Multiscale Modeling Techniques For Electrodynamic Systems, Hunter Teel
Theses and Dissertations
In order to rapidly develop better electromagnetic and electrochemical systems, approaching these complicated topics from multiple perspectives is necessary. The use of mathematical models and numerical simulation offers the ability to evaluate and predict the performance of these systems based off the principles of electrodynamics in an ideal setting. Through the use of Computational Fluid Dynamics (CFD), representative geometries of scales can be created and evaluated to provide insight into the behavior of these systems. Simulation offers a modifiable environment that can approach the relevant physics from both the microscale and macroscale. Conclusions, results, boundary conditions, or other information from …
Hybrid Renewable Multi-Generation System Optimization: Attaining Sustainable Development Goals, Md Shahriar Mohtasim, Barun K. Das, Utpol K. Paul, Md Golam Kibria, Md Sanowar Hossain
Hybrid Renewable Multi-Generation System Optimization: Attaining Sustainable Development Goals, Md Shahriar Mohtasim, Barun K. Das, Utpol K. Paul, Md Golam Kibria, Md Sanowar Hossain
Research outputs 2022 to 2026
The optimization of hybrid renewable multi-generation systems is crucial for enhancing energy efficiency, reducing costs, and ensuring sustainable power generation. These factors can be significantly affected by system designs, optimization methods, climate changes, and varying energy demands. The optimization of a stand-alone hybrid renewable energy system (HRES) that integrates various combinations of electricity, heating, cooling, hydrogen, and freshwater needs has not been reported in a single comprehensive study. Additionally, there has been insufficient attention given to the impact of temporal resolution, the recovery of excess energy usage, and aligning these efforts with the sustainable development goals (SDGs). This study reviews …
Photo-Thermal Conversion Properties Of Mxene/Metal-Organic-Frameworks-Based Nanofluids For Solar Energy Harvesting, Seyedeh Zahra Haeri, Ali Dashan, Samira Sadeghi, Mitral Golgoli, Mehdi Khiadani, Bahram Ramezanzadeh, Masoumeh Zargar
Photo-Thermal Conversion Properties Of Mxene/Metal-Organic-Frameworks-Based Nanofluids For Solar Energy Harvesting, Seyedeh Zahra Haeri, Ali Dashan, Samira Sadeghi, Mitral Golgoli, Mehdi Khiadani, Bahram Ramezanzadeh, Masoumeh Zargar
Research outputs 2022 to 2026
This study focuses on enhancing solar energy capture efficiency by introducing innovative hybrid nanofluids for use in solar thermal collectors, whose performance largely depends on the absorption properties of the working fluid. The newly developed hybrid nanofluids, MXene/NH2-UiO66 (Zr) (noted as MX/UO66) and MXene/MIL-88B (Fe) (noted as MX/ML88), were synthesized using an in-situ solvothermal method, combining annealed Ti3C2Tx MXenes with water-stable metal–organic frameworks (MOFs). These nanofluids achieved high efficiency at low concentrations, providing both economic and performance benefits. Comprehensive testing compared the photothermal properties of these hybrids with single-component UO66 and ML88 nanofluids. The MX structures significantly expanded the absorption …
Performance Comparison Of Flat Sheet And Hollow Fibre Air Gap Membrane Distillation: A Mathematical And Simulation Modelling Approach, Hamed Kariman, Hussein A. Mohammed, Masoumeh Zargar, Mehdi Khiadani
Performance Comparison Of Flat Sheet And Hollow Fibre Air Gap Membrane Distillation: A Mathematical And Simulation Modelling Approach, Hamed Kariman, Hussein A. Mohammed, Masoumeh Zargar, Mehdi Khiadani
Research outputs 2022 to 2026
Membrane Distillation (MD) systems could address current challenges related to global water demand. Among MD systems, Air Gap Membrane Distillation (AGMD) systems play crucial roles in addressing this challenge. AGMD systems can be categorized into two main structural groups: flat sheet and hollow fibre forms. It is important to study, analyse, model and compare these two systems under the same operational conditions. In this study, a detailed mathematical model of flat sheet and hollow fibre AGMD modules under the same conditions (i.e., membrane type, membrane area, porosity, and pore radius of membrane) has been introduced. The simulation of system performance …
Sorption-Based Lithium Extraction From Diverse Brines Using Aluminium-Based Adsorbent, Mohsen Farrokhrouz, Mahdi Madelatparvar, Yasaman Boroumand, Amin Sarmadi, Mehdi Khiadani, Amir Razmjou
Sorption-Based Lithium Extraction From Diverse Brines Using Aluminium-Based Adsorbent, Mohsen Farrokhrouz, Mahdi Madelatparvar, Yasaman Boroumand, Amin Sarmadi, Mehdi Khiadani, Amir Razmjou
Research outputs 2022 to 2026
As demand and pressures to produce more lithium increases in the world in a more cost effective and environmentally sustainable, the existing proven methods such as aluminate-based adsorption should be adapted and combined with naturally heated brines to reduce cost, complexity and carbon footprint of production. In this study, an improved type of aluminate-based adsorbent was utilized to adsorb Li content of different brine sources, to show the relationship between the performance of the adsorbent and other factors in the brine. Different brine samples were synthesised from various geographical locations around the world to check the adsorption capacity of the …
Josephson Junctions: Fabrication And Applications For The Axion Dark Matter Experiment, Jonah M. Sachs
Josephson Junctions: Fabrication And Applications For The Axion Dark Matter Experiment, Jonah M. Sachs
Senior Honors Papers / Undergraduate Theses
The observation of axions could revolutionize the world of physics. Through microwave frequency cavity readout of the photons associated with these axions, the ADMX project at WashU utilizes multiple different forms of the Josephson junction (JJ), a superconductive circuit element. The physics behind the JJ are essential to understanding its operation for resonant cavity readout in addition to parametric amplification. Parametric amplifiers produced using JJs can approach the signal-to-noise ratio set by quantum mechanics, and prove essential for the amplification chain used by the ADMX experiment for axionic detection. The limits of these amplifiers are set by the noise tuning …
Justification Of Permissible Discharges Of Water Users Into Water Bodies, Mariia S. Stroganova, Ivan V. Antonov, Andrey V. Epifanov
Justification Of Permissible Discharges Of Water Users Into Water Bodies, Mariia S. Stroganova, Ivan V. Antonov, Andrey V. Epifanov
CHEMISTRY AND CHEMICAL ENGINEERING
The purpose of this work is developing an algorithm for ecological and technological rationing of the permissible load on water bodies using geoinformation systems. The algorithm takes into account the self-purification of aquatic ecosystems using a three-component model. Initially, the article provides an overview of methods for determining the permissible discharge masses of pollutants for developing new approaches to rationing. The algorithm of ecological and technological rationing of the load on water bodies and geoinformation systems for its implementation is proposed. The main models used to assess the ecological state of an aquatic ecosystem are considered. A three-component model of …
Separation Of Fatty Acids From Horse Fat And Their Analysis, Sherzod Y. Rakhmanov, Madina O. Khamidovа, Dilshod P. Rakhimov, Rashidah Sokur, Nuriddin T. Kenjaev
Separation Of Fatty Acids From Horse Fat And Their Analysis, Sherzod Y. Rakhmanov, Madina O. Khamidovа, Dilshod P. Rakhimov, Rashidah Sokur, Nuriddin T. Kenjaev
CHEMISTRY AND CHEMICAL ENGINEERING
A distinctive feature of horse fat from other animal fats is the presence of amino acids and keratin in its composition, which are not found in other oils, including polyunsaturated fatty acids, proteins, microelements, vitamins A, E, PP, B. The aim of this work is to separate fatty acids from horse fat and analyze them. The process of separating fatty acids included the stages of saponification with sodium hydroxide, decomposition of the resulting soaps in the presence of concentrated sulfuric acid. The study of the composition of the separated fatty acids by the chromatograph mass spectrometric method of analysis established …
Synthesis, Crystal Structure And Some Physicochemical Properties Of Cerium Complexes Containing Beta-Diketonate Ligands, Feruza F. Fayzullayeva, Salmon M. Mukhammadiev, Gulbeka Yu. Mamatova, Shahlo Sh. Daminova
Synthesis, Crystal Structure And Some Physicochemical Properties Of Cerium Complexes Containing Beta-Diketonate Ligands, Feruza F. Fayzullayeva, Salmon M. Mukhammadiev, Gulbeka Yu. Mamatova, Shahlo Sh. Daminova
CHEMISTRY AND CHEMICAL ENGINEERING
The objective of this study is to synthesize and characterize novel Ce(III) coordination compounds utilizing the β-diketonate ligand (1,3-diphenylpropane-1,3-dione). The structures of the resulting complexes were determined through single crystal X-ray diffraction (XRD). In these complexes, the oxygen atoms of the ligand form bidentate bonds with the metal ion. The geometry surrounding the cerium ion is described as distorted square antiprismatic, influenced by the flexibility and steric hindrance of the dibenzoylmethane (dbm) ligand. Additional characterization of the newly synthesized complex was performed using IR spectroscopy, thermal analysis, and scanning electron microscopy (SEM).
Synthesis Of Acetylene Diols In The Catalytic System Of Cu(Otf)2/Thf/Tbabr, Abduvakhаb Ikramov, Lochinbek Q. Ablakulov, Odiljon E. Ziyadullayev, Sardor M. Rakhmatov, Mirjalol E. Ziyadullayev
Synthesis Of Acetylene Diols In The Catalytic System Of Cu(Otf)2/Thf/Tbabr, Abduvakhаb Ikramov, Lochinbek Q. Ablakulov, Odiljon E. Ziyadullayev, Sardor M. Rakhmatov, Mirjalol E. Ziyadullayev
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the work was the synthesis of acetylenediols in the Cu(OTf)2/THF/TBABr catalytic system. The synthesis of acetylenic diols based on the alkynylation process of aliphatic and heterocyclic ketones containing two carbonyl groups in their molecules in the presence of alkyne hydrocarbons was studied for the first time using the Cu(OTf)2/THF/TBABr catalytic system. The effects of temperature, reaction time, nature of solvent and catalyst, and molar amount of starting materials on the synthesis of acetylenic alcohols in the selected system were studied, and based on the results obtained, alternative conditions for the process were found.
Synthesis And Study Of New Complex Compounds Of Copper(Ii) And (5-Methyl-1,3,4-Thiadiazole-2-Ylsulfanil)-Acetic Acid, Ekaterina V. Kinshakova, Aziz K. Atashov, Batirbay S. Torambetov, Shakhnoza A. Kadirova
Synthesis And Study Of New Complex Compounds Of Copper(Ii) And (5-Methyl-1,3,4-Thiadiazole-2-Ylsulfanil)-Acetic Acid, Ekaterina V. Kinshakova, Aziz K. Atashov, Batirbay S. Torambetov, Shakhnoza A. Kadirova
CHEMISTRY AND CHEMICAL ENGINEERING
The purpose of this study is to synthesize new copper (II) coordination compounds with a heterocyclic polydentate ligand (5-methyl-1,3,4-thiadiazole-2-ylsulfanyl) -acetic acid and to study their structure. The structure of the complexes was established by the method of X-ray diffraction analysis (XRD) of single crystals, it was shown that the complexes have a polymer structure and a coordination polyhedron of the square pyramid type, however, one of them is mono-nuclear composition (C10H14CuN4O6S4*2H2O)n, and the second is bi-nuclear composition of cluster type (C20H20Cu2 …
Synthesis Of Acetylene-Based Hetarene Derivatives In The Presence Of Catalysts, Abdulla T. Umrzokov, Abduvaxаb Ikramov, Khusnitdin M. Vapoev, Yusuf K. Zhumanov, Sardor M. Kodirov
Synthesis Of Acetylene-Based Hetarene Derivatives In The Presence Of Catalysts, Abdulla T. Umrzokov, Abduvaxаb Ikramov, Khusnitdin M. Vapoev, Yusuf K. Zhumanov, Sardor M. Kodirov
CHEMISTRY AND CHEMICAL ENGINEERING
The aim of the study is to synthesize hetaren derivatives of acetylene amination reactions using local natural raw materials as catalyst carriers. Various grades of Oltintag and Angren kaolins, various grades of Navbakhor bentonite, as well as the opaque rock of the Karmaninsky deposit were used as catalyst carriers. Thermal, acidic and hydrothermal treatment was carried out on the appropriate sorbents, with the production of catalysts of various modifications from sorbents and active components. The processes of catalytic condensation of acetylene with ammonia were studied using modified catalysts. The effect of the reaction temperature, the active components of the catalyst, …
Reweighting Configurations Generated By Transferable, Machine Learned Models For Protein Sidechain Backmapping, Jacob Monroe
Reweighting Configurations Generated By Transferable, Machine Learned Models For Protein Sidechain Backmapping, Jacob Monroe
Chemical Engineering Faculty Publications and Presentations
Multiscale modeling requires the linking of models at different levels of detail, with the goal of gaining accelerations from lower fidelity models while recovering fine details from higher resolution models. Communication across resolutions is particularly important in modeling soft matter, where tight couplings exist between molecular-level details and mesoscale structures. While multiscale modeling of biomolecules has become a critical component in exploring their structure and self-assembly, backmapping from coarse-grained to fine-grained, or atomistic, representations presents a challenge, despite recent advances through machine learning. A major hurdle, especially for strategies utilizing machine learning, is that backmappings can only approximately recover the …
Design Features Of Ion Exchange Plant For Wastewater Treatment, Tatyana Vladimirovna Drabkova, Sadritdin Makhamatdinovich Turabdzhanov, Fayzulla Nigmatullaevich Rakhmatullaev, Ulughukha Nusratullaevich Rakhmatov, Aziza Alimdzhanovna Shokhakimova
Design Features Of Ion Exchange Plant For Wastewater Treatment, Tatyana Vladimirovna Drabkova, Sadritdin Makhamatdinovich Turabdzhanov, Fayzulla Nigmatullaevich Rakhmatullaev, Ulughukha Nusratullaevich Rakhmatov, Aziza Alimdzhanovna Shokhakimova
Technical science and innovation
This study presents an ion exchange unit designed for selective and comprehensive wastewater treatment. The unit includes all technological processes: solution filtration, ion exchanger loosening, sorbent regeneration and washing, which is a significant advantage of the proposed technology and eliminates the need for additional devices. This significantly increases the overall efficiency of the cleaning process, reducing costs and simplifying the operation of the system. Experimental studies have confirmed the high efficiency and feasibility of using ion exchange units in modern operating conditions, which makes them universal in application for various industries, including metallurgy and chemistry. The main idea of the …
Sorption-Spectroscopic Method For Determining Mn Ions In Wastewater, Zulayho Asanalievna Smanova, Zukhra Ziyatovna Yakshieva, Nazira Kuchkarbayevna Madusmanova, Gulyorkhon Otkir Qizi Miradkhamova
Sorption-Spectroscopic Method For Determining Mn Ions In Wastewater, Zulayho Asanalievna Smanova, Zukhra Ziyatovna Yakshieva, Nazira Kuchkarbayevna Madusmanova, Gulyorkhon Otkir Qizi Miradkhamova
Technical science and innovation
In this article, the processes of metal complex synthesis are studied in detail. Zinc OEDF+NTF complexation reactions were carried out in the presence of polyhydric alcohols, ethylene glycol, glycerol, and citric acid. For the first time, the synergistic efficiency of a mixture of zinc OEDF+NTF complexes with methyldiethanolamine, used as an inhibitor of mineral salt accumulation, was studied. It was found that when selecting the components in equivalent amounts, the inhibition efficiency of the composition is at least 90%. The high efficiency of inhibiting mineral salt accumulation in the composition is due to the presence of methyldiethanolamine, alkylimidazoline, and their …
Mechanical Cleaning Of Industrial Exhaust Gases By Wet Method., A. A. Turgunov, E. A. Egamberdiev, R. F. Rashidov, A. A. Kholmurodov, D. J. Ergash
Mechanical Cleaning Of Industrial Exhaust Gases By Wet Method., A. A. Turgunov, E. A. Egamberdiev, R. F. Rashidov, A. A. Kholmurodov, D. J. Ergash
Technical science and innovation
Environmental protection is a priority area of human development. This paper presents the materials of scientific research of the creative group of the Tashkent State Technical University named after Islam Karimov, aimed at mineralization of the load on the environment, in particular on the atmospheric air of industrial enterprises. One of the more accessible solutions to this problem is the use of modern, more efficient devices for capturing and neutralizing exhaust gas emissions into the atmosphere from industry. Today, the use of mechanical methods for capturing pollutants is relevant due to the simplicity of design and operation. Wet methods for …
The Role Of Chitosan In Increasing The Mechanical And Antibacterial Properties Of Paper, Khurshid Khamidulla Ugli Khaydullaev, Jaloliddin Faxriddin Ugli Ungarov, Munavvar Umar Kizi Iskandarova, Yorqinjon Tulqin Ugli Ergashev, Guzal Yusupovna Akmalova, Elmurod Abduqodirovich Egamberdiev
The Role Of Chitosan In Increasing The Mechanical And Antibacterial Properties Of Paper, Khurshid Khamidulla Ugli Khaydullaev, Jaloliddin Faxriddin Ugli Ungarov, Munavvar Umar Kizi Iskandarova, Yorqinjon Tulqin Ugli Ergashev, Guzal Yusupovna Akmalova, Elmurod Abduqodirovich Egamberdiev
Technical science and innovation
Chitosan is also widely used in the paper industry to improve paper production and paper properties. Indeed, the molecular structure of chitosan is similar to cellulose, which contributes to the formation of a strong compound. Due to the presence of chitin (-NHCOCH3) functional groups in chitosan (-NH2), these groups are insoluble in water, but soluble in a solution of chitosan acid with deacetylation levels above 60%. On the contrary, chitin does not dissolve. Chitin and chitosan are insoluble in alkaline and organic solutions under normal conditions. In general, a high percentage of the amine (NH2 …
The Influence Of Dispersed Fillers On The Mechanical Properties Of Sulfur Polymer Heterocomposites, Erkin Abdukhafizovich Rakhmatov, Durdiymurad Gurbanovich Gadamov, Umida Alijonovna Ziyamukhamedova, Jasurbek Himmat Ugli Nafasov, Elbek Tukhtanazar Ugli Turgunaliev, Shokhjakhon Uktam Ugli Abdurakhimov
The Influence Of Dispersed Fillers On The Mechanical Properties Of Sulfur Polymer Heterocomposites, Erkin Abdukhafizovich Rakhmatov, Durdiymurad Gurbanovich Gadamov, Umida Alijonovna Ziyamukhamedova, Jasurbek Himmat Ugli Nafasov, Elbek Tukhtanazar Ugli Turgunaliev, Shokhjakhon Uktam Ugli Abdurakhimov
Technical science and innovation
This article discusses improving the physical, mechanical, and operational properties of composite materials modified with sulfur-containing plasticizers used in the modern construction industry. Furthermore, based on an in-depth analysis of the literature, the types and sizes of fillers and the significance of their mixing technology in the formation of a structure with low porosity of a composite material with a sulfur binder have been studied. The article thoroughly describes a method for obtaining a composite material with a stable sulfur-containing binder, the processes of preparing a solid filler, impregnating the filler with an organic modifier, humidifying and heating the filler …