Protecting Environment from Unhealthy Nitrogen Oxide Emissions of Operating Boilers

Efimov, O.; Tyutyunik, L.N.; Kasilov, V. F.; Ivanova, L. M.

doi:10.20998/2078-774x.2018.11.06

Cited by 2 publications

(3 citation statements)

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“…the possibility of processing solutions with the presence of a solid phase; the ability to regulate phase contact time; possibility of phase separation with small differences in density; high performance. All these advantages have been confirmed in the processes of separation of spent nuclear fuel [12]. Production of Zr by electrolysis…”

Section: Methodsmentioning

confidence: 69%

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Technological Basis of the Process of Zirconium and Hafnium Separation

Mukhachev,

Yelatontsev,

Kharytonova

et al. 2023

Problems of Atomic Science and Technology

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The paper presents the results of industrial testing of the process and equipment for the extraction separation of zirconium and hafnium in a single technological cycle with the production of high-purity nitrate compounds and pure nitric acid solutions as raw materials for the production of sodium nitrate. It is shown that the efficiency of the extraction process is determined primarily by the purity of the nitric acid solution by the content of a critical impurity – silicic acid, which causes an undesirable emulsification process and disrupts the stability of the process. Optimal conditions have been determined under which the formation of non-extractable forms of zirconium and hafnium is excluded. The replacement of pulsating columns with centrifugal extractors reduced operating costs by reducing the volume of a one-time load of a flammable extractant and its losses as a result of hydrolysis. This increased the degree of separation of zirconium and hafnium. Centrifugal extractors provided high process kinetics, reduced production areas, and increased labor productivity and product quality.

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Section: Methodsmentioning

confidence: 69%

“…Among the technological conditions, the critical process is the regeneration of the extractant to purify it from TBP hydrolysis products, which paralyze the extraction processes of zirconium and hafnium. An analysis of reagents for dissolving sediments was given elsewhere [12,13].…”

Section: Fig 3 Integrated Technological Scheme For Zircon Processingmentioning

confidence: 99%

Technological Basis of the Process of Zirconium and Hafnium Separation

Mukhachev,

Yelatontsev,

Kharytonova

et al. 2023

Problems of Atomic Science and Technology

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show abstract

“…У теперішній час для очищення газових викидів від сульфур (IV) оксиду запропоновано багато методів [26], але на практиці застосовуються деякі з них. Зазвичай методи знешкодження класифікують за трьома основними ознаками:…”

Section: очищення газів від сульфур (Iv) оксидуunclassified

Analysis of the Greenhouse Gas Emissions Problem and the Methods of Their Disposal

Mykhailova¹

2023

The Scientific Paradigm in the Context of Technological Development and Social Change

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Global climate change is the most important environmental current problem. Its reason is the increase of greenhouse gas concentration in the atmosphere as a result of human activity. The climate change problem affects many aspects of the environment and society's existence, therefore, the development of tools and methods for reducing greenhouse gas emissions into the atmosphere is an actual task today. The purpose of the paper is a comprehensive analysis of the greenhouse gas emissions problem state in Ukraine and the world, and to determine the main ways to solve this problem. The scientific and research paper tasks are: to provide a general greenhouse gas characteristic, determine the main consequences of climate change for Ukraine, analyze Ukraine's international steps to solve the problem of global climate change, establish the structure of greenhouse gas emissions in Ukraine, analyze existing and propose optimal chemical and technological methods for greenhouse gases neutralizing. The methodology of the study is based on a monographic type of research using general research methods of analysis, synthesis, induction, deduction and historical detailing. The results. The article provides a general greenhouse gas characteristic, the main sources of their emissions and their consequences for humans and the environment. The steps taken by the world society and Ukraine, in particular, to solve the global climate change problem are analyzed. The problem is solved by concluding international agreements to stabilize the greenhouse gas concentration in the atmosphere at a level that does not have a dangerous anthropogenic impact on the climate of Earth. It was determined that the main sources of greenhouse gas emissions in Ukraine are the enterprises of the fuel and energy complex, and enterprises of the processing and mining industry. An analysis of chemical-technological cleaning methods for greenhouse gas is presented. Practical implications. The analytical review makes it possible to choose the optimal method of greenhouse gas neutralizing in industrial emissions. The method chosen will depend on the required degree of cleaning, composition and volume of gas, properties of reagents and auxiliary materials used possibilities of disposal of cleaning process products and technical and economic indicators of the chosen method. Value/originality. The conducted research allows for a comprehensive solution to the greenhouse gas emissions problem, understanding its causes, consequences, and social and chemical-technological solutions.

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Protecting Environment from Unhealthy Nitrogen Oxide Emissions of Operating Boilers

Cited by 2 publications

References 0 publications

Technological Basis of the Process of Zirconium and Hafnium Separation

Technological Basis of the Process of Zirconium and Hafnium Separation

Analysis of the Greenhouse Gas Emissions Problem and the Methods of Their Disposal

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