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Articles 1 - 6 of 6
Full-Text Articles in Other Chemical Engineering
Optimization Of Renewable Energy-Based Alkaline Electrolysis Systems For Sustainable Hydrogen Production, Shokhrukhbek Kozimjon Ugli Bakhramov
Optimization Of Renewable Energy-Based Alkaline Electrolysis Systems For Sustainable Hydrogen Production, Shokhrukhbek Kozimjon Ugli Bakhramov
Chemical Technology, Control and Management
This paper presents a comprehensive optimization study of hydrogen production systems through alkaline water electrolysis powered by photovoltaic energy sources, with a specific focus on Central Asian applications. The research systematically investigates critical operating parameters including KOH electrolyte concentration (25-30 wt%), temperature effects (25-80°C), current density optimization (100-500 mA/cm²), and electrode material performance using cost-effective 316L stainless steel. Experimental results demonstrate that optimized systems achieve solar-to-hydrogen efficiency of 13-15%, with hydrogen production costs ranging from $2-8/kg depending on system scale. The study reveals that maximum performance occurs at 30 wt% KOH concentration, 60-80°C operating temperature, and 200-400 mA/cm² current density. …
Review And Analysis Of Methods And Techniques For Refining Vegetable Oils, Umidjon Ruziev, Marufjon K. Shodiev
Review And Analysis Of Methods And Techniques For Refining Vegetable Oils, Umidjon Ruziev, Marufjon K. Shodiev
Chemical Technology, Control and Management
This article provides a comparative analysis of the main methods of vegetable oil refining: alkaline (chemical), physical, and combined. It examines the stages of the technological process and the applicability of each method for various types of oils (palm, soybean, cottonseed, sunflower, rapeseed, etc.). Attention is paid to energy consumption at the stages of neutralization, washing, drying, and deodorization, as well as the impact of equipment performance on specific energy consumption. Approximate calculations of the distribution of thermal and electrical energy during the processing of 1 kg of oil are provided. It is noted that physical refining, despite the high …
Modeling Of Amine-Based Co2 Capture Process, Zafar Safarovich Turakulov
Modeling Of Amine-Based Co2 Capture Process, Zafar Safarovich Turakulov
Chemical Technology, Control and Management
A significant factor influencing climate change is the release of carbon dioxide (CO2) into the atmosphere as a consequence of human activities such as the combustion of fossil fuels. Climate change can be slowed down by taking action to mitigate industrial-scale CO2 emissions. Currently, the most advanced technology for capturing CO2 from industrial flue gases is the post-combustion CO2 capture based on amine absorption. However, due to the high energy penalties of existing CO2 capture technologies and insufficient carbon markets, it is necessary to develop methods that compete with these technologies or minimize their …
Determination Of Oxidative Stability Of Crude And Refined Vegetable Oils By Rancimat, Oybek Zufarov, Kamar Serkayev
Determination Of Oxidative Stability Of Crude And Refined Vegetable Oils By Rancimat, Oybek Zufarov, Kamar Serkayev
Chemical Technology, Control and Management
The oxidative stability of vegetable oils has been introduced as a critical factor that affects on its quality, shelf life, and nutritional value. In this study, the Rancimat method was analyzed for investigation and comparing the oxidative stability of crude and refined vegetable oils. The induction period, representing the time taken for significant oxidative degradation to occur, has been used as a key parameter to evaluate the oxidative stability. The oxidative stability of different types of vegetable oils, including sunflower, rapeseed, soybean, and cottonseed oil, was studied at various stages of processing: water degummed and neutralized oil. The induction period …
A Study Of Hygrometer Based On The Method Of Intracavity Laser Absorption, Abdulaziz Muminovich Nazarov Prof, Mirkomil Mirhidoyat Ogli Xasanov
A Study Of Hygrometer Based On The Method Of Intracavity Laser Absorption, Abdulaziz Muminovich Nazarov Prof, Mirkomil Mirhidoyat Ogli Xasanov
Chemical Technology, Control and Management
The article presents the results of experimental studies of a fiber-optic humidity sensor, the principle of operation of which is based on the method of intracavity laser absorption. A method of intracavity laser absorption is described, which makes it possible to dramatically increase the sensitivity of the fiber humidity sensor by switching to it. A schematic diagram of a fiber optical humidity sensor using a differential detection scheme and a design of an active ring laser fiber consisting of a diode pump laser, a fiber pump beam splitter, two directional couplers, a measuring ring laser, a ring comparison laser, two …
Features Of Hydration Process, Structure Formation And Curing Processes Of Mono And Polymineral Cement In The Presence Of Additives Of Solid Waste Of Soda Production, Nargis Shamadinova, Gulnora Abdukadirovna Tokhtakhunova Phd, Temur Azimovich Atakuziev, Shakhnoza Saidanvarovna Rakhimjanova
Features Of Hydration Process, Structure Formation And Curing Processes Of Mono And Polymineral Cement In The Presence Of Additives Of Solid Waste Of Soda Production, Nargis Shamadinova, Gulnora Abdukadirovna Tokhtakhunova Phd, Temur Azimovich Atakuziev, Shakhnoza Saidanvarovna Rakhimjanova
Chemical Technology, Control and Management
The influence of the additive of solid waste of soda production (SWSP) on the content of -C2S and C3S in cement studied. It was found that SWSP affects the density of the aluminum-containing minerals C3A and C4AF, in addition, in the presence of gypsum, their plasticizing properties improved. The introduction of SWSP additives during grinding of clinker intensifies the grinding process and made it possible to obtain a more plastic cement. It was proved that SWSP with CaCl2 content can be used as an additive to concrete and cement mortars - …