Production Of Lime-Ammonium Nitrate Based On Chalk, Nitrate And Ammonium Sulfate,
2021
Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan Address: 77-a, Mirzo Ulugbek str., 100170, Tashkent, Uzbekistan
Production Of Lime-Ammonium Nitrate Based On Chalk, Nitrate And Ammonium Sulfate, O.X. Rasulov, Abdurasul Mamataliyev, M.X. Dadaxodjaeva, Sh.S. Namazov, B.M. Beglov
Chemical Technology, Control and Management
The article studies the process of obtaining carbonate-ammonium nitrate (CAN) based on the mixing of melt ammonium nitrate (NH4NO3) with chalk (СаСО3) and ammonium sulfate (NH4)2SO4). For the granulation of nitrate-sulfate-carbonate melt the prilling method is applied using a granulation tower. Determined the composition and properties of new types of fertilizers. It is shown that with the ratio NH4NO3 : СаСО3 : (NH4)2SO4 = 100 : 24 : 1 the product contains 28,03% N, SO3 – 0,50%, 10% …
Selection Of Mineral Raw Material Fields For Glauconite Sorption Materials,
2021
PhD, Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan
Selection Of Mineral Raw Material Fields For Glauconite Sorption Materials, Diyor Xadjibayev, Furkat Ilyasovich Erkabaev
Chemical Technology, Control and Management
Natural minerals, such as bentonite, kaolinite, biotite, vermiculite, and glauconite, which have sufficiently high performance properties in the softening of industrial and waste water, softening and cleaning of heavy metals, are promising. To study the physical and chemical properties of glauconites from various deposits of the country, samples of glauconite mineral were brought from the Parkent, Bukhara, and Karakalpak mountain reserves, their physical and chemical properties were studied, compared with each other, and the optimal reserve was selected. The reserves of these deposits are sufficient and have the potential for industrial development. The purpose of this study is to compare …
Mathematic Simulation Of Glass Melting Process In Glass Production,
2021
professsor. Tashkent State Technical University named after Islam Karimov. 100095, university str., 2, tashkent, Republic of Uzbekistan, E-mail: [email protected], Phone:+998-94-424-15-32;
Mathematic Simulation Of Glass Melting Process In Glass Production, Shuhrat Manapovich Gulyamov, Azamat Toirovich Rajabov, Utkir Uktam Ugli Kholmanov
Chemical Technology, Control and Management
A systematic analysis of the technological process of glass melting as an object of automatic control and management has been carried out. As an object of automatic control with distributed parameters, the mathematical description of the glassmaking furnace operation has been developed (considering the main phenomenological features of the technological mode of glassmaking).In this paper, a mathematical description of charge melting process, additional heating by electric current, bubbling, thermal conductivity and heat fluxes during the processing of molten glass have been generated. Initial conditions and simplifying assumptions have been derived. The model is based on the equations of continuity, momentum …
Algorithms Of System Synthesis For Stabilizing Uncertain Dynamic Objects,
2021
Associate Professor, Department of Information Processing Systems and Control, Tashkent State Technical University, Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone: (90) 900-56-25).
Algorithms Of System Synthesis For Stabilizing Uncertain Dynamic Objects, Uktam Farkhodovich Mamirov
Chemical Technology, Control and Management
The article deals with the formation of stable algorithms for the system synthesis for the stabilizing uncertain dynamic objects based on the method of local optimization in the presence of approximate mathematical models. The article analyzes the issues of building adaptive control systems using the concept of roughness, taking into account the assessment of the maximum allowable discrepancy between the object and its model. Some of the most constructive algorithms for determining pseudo-inverse matrices are given. When calculating the pseudo-inverse matrix of the control object, modified QR decomposition algorithms are used, obtained by deleting or assigning a column. The obtained …
Algorithms For Synthesis Of Discrete Controllers In Nonlinear Control Systems With Delay,
2021
Karshi Engeneering-Economic Institute, Address: Independence, 225 st., 180100, Karshi city, Republic of Uzbekistan E-mail: [email protected],
Algorithms For Synthesis Of Discrete Controllers In Nonlinear Control Systems With Delay, Alisher Rajabaliyevich Mallayev, Suban Nurullayevich Xusanov
Chemical Technology, Control and Management
Algorithms for the synthesis of discrete controllers in nonlinear control systems, taking into account the delay, have been proposed. The synthesized vector controller provides a solution to the control problem, for example, the translation of the image point of a closed system from arbitrary initial conditions to the origin of the phase space coordinates. Built on the basis of a series-parallel set of invariant manifolds, the dynamic discrete controller ensures the fulfillment of the specified technological requirements, the asymptotic stability of a closed discrete-continuous system, and has the property of predicting the behavior of the system after sampling. These algorithms …
Principles Of Eliminating The Impact Of Disturbances On Integrated Information And Analytical Systems,
2021
Tashkent State Technical University Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone: +998-71-246-92-36;
Principles Of Eliminating The Impact Of Disturbances On Integrated Information And Analytical Systems, Orifjon Olimovich Zaripov, Umidjon Sharabidinovich Hamrakulov, Fatima Faxritdinovna Isxakova
Chemical Technology, Control and Management
Today, production management using integrated information and analytical systems and their integration with the elements of Industry 4.0 is considered one of the most pressing problems in all areas of production. The correct formation of the structure of information systems in their development contributes to the formation of elements of Industry 4.0 and their further full and high-quality integration into other areas. When implementing these processes, one of the most important steps is to reduce the impact of disturbances on integrated information and analytical systems. Taking into account the above, the article considers mathematical models of the principles of eliminating …
Economic Feasibility Of Mixed Plastic Waste Pyrolysis Using Twin Reactor System In Northwest Arkansas,
2021
University of Arkansas, Fayetteville
Economic Feasibility Of Mixed Plastic Waste Pyrolysis Using Twin Reactor System In Northwest Arkansas, Carol Rogers, Patricia Means, Renato Gonzalez, Kaida Sheets, Hayden Townsend
Chemical Engineering Undergraduate Honors Theses
Plastic waste generation is increasing at an unsustainable rate while recycling solutions remain stagnant. As a chemical means of recycling, mixed plastic waste pyrolysis can generate synthetic oil appropriate for use as fuel in power generation from plastic waste that otherwise accumulates in landfills. With the scaling of a commercial plastic pyrolysis process in Northwest Arkansas (NWA) modeled after an operational sawdust pyrolysis unit in Huntsville, Arkansas, economic analysis resulted in 26.3% internal rate of return. Therefore, construction of a commercial mixed plastic-to-fuel pyrolysis plant is economically justified and should be pursued. To effectively implement the proposed design, NWA must …
Machine Learning Representations For Optimization Of Process Systems,
2021
University of Arkansas, Fayetteville
Machine Learning Representations For Optimization Of Process Systems, Logan Watts
Chemical Engineering Undergraduate Honors Theses
The optimal operation of chemical processes provides the foundation for optimization problems to determine the most effective way to operate or design a given process. Chemical processes can be represented as nonlinear systems of equations with decision variables, resulting in a problem that can be solved through nonlinear solvers. The downfalls of nonlinear solvers create the need for improved methods of finding globally optimal solutions to the design or operation of a chemical process. The project will seek to evaluate the use of artificial neural networks to approximate nonlinear systems of equations for the purpose of optimizing chemical processes. The …
Economic Feasibility Of A Methanol To Dimethyl Ether Production Process To Avoid Contract Failure Shortfalls From The Covid-19 Pandemic,
2021
University of Mississippi
Economic Feasibility Of A Methanol To Dimethyl Ether Production Process To Avoid Contract Failure Shortfalls From The Covid-19 Pandemic, Jacob Noll, Robert Wasson, Harrison Mckinnis
Honors Theses
Our team entered the 2021 AVEVA Academic Competition, where teams of undergraduate senior chemical engineering students competed across the country. The competition was composed of two parts: the base case design and the optimization of a chemical process. As part of the competition, our team is acting as the Engineering team for a fictional company that has given us this project. Due to COVID-19, our methanol producing company has lost a contract with a customer, leaving 23,000 tonnes/yr of unclaimed methanol. We have two choices with this methanol: either sell the methanol on the market at the spot price for …
Development Of An Integrated Salt Cartridge-Reverse Electrodialysis (Red) Device To Increase Electrolyte Concentrations Of Human Blood Flow To Power Biomedical Devices,
2021
University of Arkansas, Fayetteville
Development Of An Integrated Salt Cartridge-Reverse Electrodialysis (Red) Device To Increase Electrolyte Concentrations Of Human Blood Flow To Power Biomedical Devices, Caroline Campbell
Chemical Engineering Undergraduate Honors Theses
Emerging technologies in nanotechnology and biomedical sciences have led to an increase in biomedical implantable devices including cardiac pacemakers, artificial organs, drug pumps, and sensors. These devices require continuous stable and reliable power to operate, which creates the demand for the need to find a safe, reliable, and stable power source. A promising avenue for a power source for these devices is a miniaturized reverse electrodialysis (RED) biopower cell design that utilizes the salinity differences between bloodstreams that flow inside the human body. Initial results of the RED system demonstrate that higher gradient salinity differences between streams lead to a …
Design, Analysis, And Optimization Of A Process To Produce Dimethyl Ether From Methanol,
2021
University of Mississippi
Design, Analysis, And Optimization Of A Process To Produce Dimethyl Ether From Methanol, Thomas Mathwig
Honors Theses
The company that the engineering team works for is facing a contract loss with one of its customers of methanol. To avoid economic losses, a process has been proposed for converting the unused methanol to dimethyl ether (DME) through a dehydration reaction. After a preliminary simulation of the base case and optimization of the distillation column, an Equivalent Annual Operating Cost (EAOC) of $140,000 was calculated for the column. The EAOC was the sum of the annualized capital investment and the annual operating cost. Determining the process to be worth pursuing, a Toller was brought in to provide rental equipment …
Peptoid Microsphere Coatings To Improve Performance In Sandwich Elisa Microarrays,
2021
University of Arkansas, Fayetteville
Peptoid Microsphere Coatings To Improve Performance In Sandwich Elisa Microarrays, Jesse L. Roberts, German R. Perez Bakovic, Shannon L. Servoss
Chemical Engineering Faculty Publications and Presentations
Enzyme-linked immunosorbent assay (ELISA) microarray performance is limited by low assay sensitivity and dynamic range. Increasing the surface area for reagent binding can help to improve performance, but standard techniques such as roughening the surface or adding a polymer coating lead to increased non-specific fluorescence and do not have reproducibly improved performance. Another approach to increase surface area is adding a microsphere coating on the surface. Poly-N-substituted glycine (peptoid) microspheres are ideal for this application due to low immunogenicity, protease-resistance, and biocompatibility. Peptoids are polymers with a backbone similar to peptides, but with the side chains appended to nitrogen rather …
Anomaly-Handling In Lyapunov-Based Economic Model Predictive Control Via Empirical Models,
2021
Wayne State University
Anomaly-Handling In Lyapunov-Based Economic Model Predictive Control Via Empirical Models, Helen Durand
Chemical Engineering and Materials Science Faculty Research Publications
A question that faces data-driven autonomous systems is verification that they will perform in a safe manner despite changes in the environment on which they act over time or incomplete knowledge of the system model. This work analyzes closed-loop stability of nonlinear systems under Lyapunov-based economic model predictive control (LEMPC) with data-driven models in the case where it is desirable to have the ability to detect when the data-driven model is or becomes insufficiently accurate for maintaining the closed-loop state in an expected region of state-space. Implications of the results for false sensor measurement cyberattacks seeking to impact the fidelity …
To Increasing The Absorption Area Of Column Apparatus With Tubular Lattice Nozzles,
2021
Doctor of technical scienses, professor, Tashkent Chemical Technological Institute, Tashkent, Republic of Uzbekistan, Phone:+998974009701;
To Increasing The Absorption Area Of Column Apparatus With Tubular Lattice Nozzles, Nurmukhamedov Habibulla Sagdullaevich, Batir Babatulaev, Elbek Mavlanov, Samukdjan Nigmadjanov
Chemical Technology, Control and Management
The problem of creating a compact refrigeration zone for absorbers with tubular-lattice nozzles made of pipes with spiral turbulators is discussed. Research has been carried out on the influence of the groove depth h/D and α/αгл of the step of their placement t/D on the degree of heat transfer intensification α/αо in the transition region of the gas-liquid flow. An intensification of heat transfer has been achieved only by increasing the groove depth from h/D = 0,003 to 0,095 and the optimal pitch of the grooves, the intensity of heat transfer is 2 or more times. Research has …
Mathematical Models Of New Magnetoelastic Sensor For Measure Of Power And Vibration Parameters,
2021
Tashkent State Transport University Address: 1 Odilhodjaev st., 100167, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone: +998903251116.
Mathematical Models Of New Magnetoelastic Sensor For Measure Of Power And Vibration Parameters, Javhar Sulton Ugli Fayzullayev
Chemical Technology, Control and Management
In the paper, the mathematical models of the new magnetoelastic sensor for measuring power and vibration parameters are developed taking into account the aggregation or scattering of the parameters of electromagnetic chains and the characteristics of the magnetization curve of the magnetic conductor material. The analysis of the generated mathematical models and graphs based on them showed that the magnetic chain in which the coils are assembled does not take into account the nonlinearity of the magnetization curve of the magnetic conductive material (electrotechnical steel), the result is 12 ÷ 15% of the experimental results. It varies by 6 ÷ …
Estimating The Bubbling Process Of Ozone-Containing Gases In The Water,
2021
Tashkent State Agrarian University, Address:2 University st.,100110, Tashkent city, Republic of Uzbekistan Phone: +998 981017350.
Estimating The Bubbling Process Of Ozone-Containing Gases In The Water, M.P. Parpiev, А.А. Simonov, Aleksey Kamardin, Abdulaziz M. Nazarov
Chemical Technology, Control and Management
Theoretical estimates were made and significant factors of dissolution of ozone-containing gases in water during bubbling in tanks were determined. The expediency of using microbubbles for more efficient saturation of water and aqueous solutions with ozone and generation of ozone with maximum concentration is shown. It is shown that when bubbling gas in water, including ozone-containing gas, the most important indicator is the volume gas content, which determines the ratio of the volume of the gas phase to the volume of the gas-liquid mixture in the contact apparatus. In the presence of a set of bubbles in the water, the …
Calculate The Reliability Of The Bts-Bsc Network With The Reserved Line Connection,
2021
Tashkent University of Information Technologies Named after Muhammad Al-Khwarizmi, Tashkent city, Republic of Uzbekistan
Calculate The Reliability Of The Bts-Bsc Network With The Reserved Line Connection, Dilmurod Davronbekov, Utkir Karimovich Matyokubov
Chemical Technology, Control and Management
The issue of reserving communication lines between the base station and the mobile network base station controller which are considered as one system is considered. Analytical expressions have been developed for calculating the reliability of the system for various options for backing up communication lines between the base station and the base station controller. The results of research and calculations of reliability for ten different types of backup communication lines of the base station and the base station controller are presented.
Mathematical Model Of A System For Controlling And Diagnosing The Safety State Of Oil And Gas Territory,
2021
Doctor of Technical Sciences, Professor, Department of Information Processing Systems and Management, Tashkent State Technical University. Tashkent city, Republic of Uzbekistan,Tel .: (99) 919-71-64 (m.),
Mathematical Model Of A System For Controlling And Diagnosing The Safety State Of Oil And Gas Territory, Erkin Uljaev, Utkirjon Murodillaevich Ubaydullaev, Gayrat Bakhtiyarovich Tadzhitdinov, Sherzod Kholmuminovich Eshkuvatov
Chemical Technology, Control and Management
In this article, the way of creation mathematical model of a control system and diagnostics of the security status of the oil and gas territory is considered. For performing diagnostics of the safety of a status of the oil and gas territory as a mathematical apparatus it is suggested to use a boolean algebra. The main controlled objects and their technological parameters which define safety, integrity of saving, operational carrying out monitoring status as separate objects and all oil and gas territory, prediction of the expected threats, economic social, and economic damage are selected. For the creation of a mathematical …
Intellectual Educational Technologies Of Coherent Maintenance Of Digital Transformations,
2021
Doctor Phys.-Math. sciences, professor, Director of the Belarusian-Uzbek Interdisciplinary Institute of Applied Technical Qualifications, Minsk-Tashkent, Belarus Phone.: +375 296 663804
Intellectual Educational Technologies Of Coherent Maintenance Of Digital Transformations, Igor Ivanovich Gancherenok, Ulugbek Mannanov, A.G. Davydovsky, Yu.A. Chernyavsky
Chemical Technology, Control and Management
The problems of forming adequate educational technologies and supporting digital transformations for the formation and development of relevant professional competencies as innovative receptivity are interpreted. The fundamental principles of educational technologies that act as a catalyst for educational innovations in the context of digital transformation of economic and social processes are described. The main modern educational platforms of educational support of professional activity are analyzed. The author's interpretation of the synergetic effects in the education system, as well as loans as an educational cryptocurrency is suggested.
Study Of The Rheological Properties Of The Suspension Formed During The Production Of Caustic Soda By The Lime Method,
2021
Professor Department Chemical technologies of inorganic substances Tashkent Chemical Technology Institute, Tashkent city, Republic of Uzbekistan, E-mail: [email protected]
Study Of The Rheological Properties Of The Suspension Formed During The Production Of Caustic Soda By The Lime Method, Aktam Ulashovich Erkaev, Dildora Tursunova
Chemical Technology, Control and Management
The process of obtaining sodium hydroxide - caustic soda by conversion of soda ash with lime milk in the presence of natural mirabilite - has been investigated. The influence of temperature, Na2CO3: Na2SO4 ratio, concentration of lime milk and duration of the conversion process on this process was studied by identifying their optimal values. The study of the rheological properties of the reaction pulp showed that it is mobile and well filtered, which makes it possible to obtain rapidly settling large crystals of Na2CO3·2Na2SO4, Na …
