Performance and Mechanistic Aspects of Ag/MgO/γdocumentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${varvec{gamma}}$$end{document}-Al2O3 as a Passive NOx Adsorber

Khatri Prateek; Bhatia Divesh

首页> 外文期刊>Catalysis Letters >Performance and Mechanistic Aspects of Ag/MgO/γdocumentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${varvec{gamma}}$$end{document}-Al2O3 as a Passive NOx Adsorber

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Performance and Mechanistic Aspects of Ag/MgO/γdocumentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${varvec{gamma}}$$end{document}-Al2O3 as a Passive NOx Adsorber

机译：Performance and Mechanistic Aspects of Ag/MgO/γdocumentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${varvec{gamma}}$$end{document}-Al2O3 as a Passive NOx Adsorber

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Abstract The potential of Ag/MgO/γdocumentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$gamma $$end{document}-Al2O3 (Ag/Mg–Al) as a passive NOx adsorber is evaluated, and is found to be superior as compared to Ag/γdocumentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$gamma $$end{document}-Al2O3. Two different adsorption sites exist on both Ag/Mg–Al and Ag/γdocumentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$gamma $$end{document}-Al2O3, and it is inferred that the primary role of MgO is not to provide additional adsorption sites but to decrease the Ag particle size, which results in a higher activity towards NOx adsorption. The product distribution profile with either NO or NO2 in the feed is found to be nearly the same at early times, which indicates the formation of the same surface species with either of the reactants. It is deduced that the facile conversion of nitrites to nitrates occurs in the presence of H2, but the extent of conversion decreases at longer times. A sequential configuration of the in-house Ag/Mg–Al and a commercial Cu/SSZ-13 catalyst yielded a NOx reduction efficiency of 85% at low temperatures as against 7% with the standalone Cu/SSZ-13 catalyst.Graphic Abstract

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来源
《Catalysis Letters》 |2021年第11期|3298-3312|共15页
作者
Khatri Prateek; Bhatia Divesh;
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作者单位

Indian Institute of Technology Delhi;

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原文格式 PDF
正文语种英语
中图分类催化;
关键词
Passive NOx adsorber; Non-PGM; MgO–Al2O3; NOx reduction; Cold start; Nitrates;

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