{"title":"Influence of Ammonia Vapor on the Catalytic Removal of N2O from Air Streams","authors":"S. A. Kulyukhin, A. A. Bessonov","doi":"10.1134/S0040579526700363","DOIUrl":null,"url":null,"abstract":"<p>The process of selective catalytic reduction of N<sub>2</sub>O with NH<sub>3</sub> vapor in an air stream over γ-Al<sub>2</sub>O<sub>3</sub>-based composite materials containing Co, Ni, Fe, Mg, Ru, and Ag compounds was studied at 523–528 K. It was found that, for composites containing Mg, Ni, Co, Fe, and Ru compounds, the introduction of NH<sub>3</sub> vapor into the gas stream resulted in an N<sub>2</sub>O decomposition degree of 3.5–7.9%. In contrast, for Ag-containing composites, the presence of NH<sub>3</sub> vapor led not to a decrease but to a significant increase in the amount of N<sub>2</sub>O in the gas phase. The amount of N<sub>2</sub>O in the gas phase increased by 25–86%. This effect is apparently associated with the oxidation of NH<sub>3</sub> by atmospheric oxygen in the presence of metal-containing composites according to the reaction: 2NH<sub>3</sub> + 2O<sub>2</sub> = N<sub>2</sub>O + 3H<sub>2</sub>O.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"60 2","pages":"231 - 236"},"PeriodicalIF":0.4000,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical Foundations of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0040579526700363","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The process of selective catalytic reduction of N2O with NH3 vapor in an air stream over γ-Al2O3-based composite materials containing Co, Ni, Fe, Mg, Ru, and Ag compounds was studied at 523–528 K. It was found that, for composites containing Mg, Ni, Co, Fe, and Ru compounds, the introduction of NH3 vapor into the gas stream resulted in an N2O decomposition degree of 3.5–7.9%. In contrast, for Ag-containing composites, the presence of NH3 vapor led not to a decrease but to a significant increase in the amount of N2O in the gas phase. The amount of N2O in the gas phase increased by 25–86%. This effect is apparently associated with the oxidation of NH3 by atmospheric oxygen in the presence of metal-containing composites according to the reaction: 2NH3 + 2O2 = N2O + 3H2O.
期刊介绍：
Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.
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