Plasma‐Catalytic Reactions for Soot Oxidation on VO x /M (M=KIT‐6, SBA‐15 and SiO 2 ) Catalysts: Influence of Pore Structure

Wu, Hanpeng, Zhu, Xinbo, Wu, Xiqiang, Tu, Xin, Chen, Geng and Yang, Guohua (2022) Plasma‐Catalytic Reactions for Soot Oxidation on VO x /M (M=KIT‐6, SBA‐15 and SiO 2 ) Catalysts: Influence of Pore Structure. ChemistrySelect, 7 (9).

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Official URL: http://dx.doi.org/10.1002/slct.202103545

Abstract

<jats:title>Abstract</jats:title><jats:p>In this work, the effect of pore structure for VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/M (M=KIT‐6, SBA‐15 and SiO<jats:sub>2</jats:sub>) catalysts on plasma‐catalytic soot oxidation was investigated. The combination of VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6 and plasma shows the highest soot oxidation rate, followed by VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/SBA‐15‐packed and VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/SiO<jats:sub>2</jats:sub>‐packed plasma reactor. The soot oxidation rate of 97.4 % and the energy efficiency of 0.95 g kWh<jats:sup>−1</jats:sup> can be achieved in plasma‐catalytic soot oxidation over VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6 at 30<jats:sup>th</jats:sup> min and 20 W. The catalysts were characterized by N<jats:sub>2</jats:sub> adsorption‐desorption, X‐ray diffraction (XRD), transmission electron microscopy (TEM), hydrogen temperature‐programmed reduction (H<jats:sub>2</jats:sub>‐TPR) and X‐ray photoelectron spectroscopy (XPS). The results illustrated that VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6 and VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/SBA‐15 had large specific surface areas and good dispersion of vanadium species. The H<jats:sub>2</jats:sub>‐TPR and XPS results confirmed that VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6 had stronger reducibility and higher relative content of O<jats:sub>ads</jats:sub>/(O<jats:sub>ads</jats:sub>+O<jats:sub>latt</jats:sub>) than those of VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/SBA‐15 and VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/SiO<jats:sub>2</jats:sub>. The good performance of soot oxidation in the plasma‐catalytic systems over VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6 could be attributed to 1) the well‐developed 3D mesoporous structure, which facilitated the transportation of radicals and active species, and 2) improved redox properties of VO<jats:sub><jats:italic>x</jats:italic></jats:sub>/KIT‐6, since more active sites and surface adsorbed oxygen species on the catalyst surfaces could contribute to soot oxidation.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	KIT-6, Mesoporous structure, Plasma-catalysis, Soot oxidation, Vanadium
Divisions:	Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	24 Mar 2022 08:45
Last Modified:	05 Sep 2023 19:15
DOI:	10.1002/slct.202103545
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3151355