文献类型：期刊文献

中文题名：Catalytic combustion of vinyl chloride emissions over Co_(3)O_(4) catalysts with different crystallite sizes

作者：Wen-Chao Hua[1];Ming-Qi Li[1];Yang-Long Guo[1];Guang-Tao Chai[1];Hao Liu[1];Yun Guo[1];Li Wang[1];Wang-Cheng Zhan[1]

机构：[1]Key Laboratory for Advanced Materials,Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2021

卷号：40

期号：4

起止页码：817

中文期刊名：Rare Metals

外文期刊名：稀有金属（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；PubMed;

基金：financially supported by the National Key Research and Development Program of China(No.2016YFC0204300);the National Natural Science Foundation of China(Nos.21922602 and 21577035);the Fundamental Research Funds for the Central Universities(No.222201717003)。

语种：英文

中文关键词：Catalytic combustion;Vinyl chloride;Cobalt oxides;Crystallite size;Preparation methods

摘要：A series of Co_(3) O_(4) catalysts was prepared by ammonia(Co-AP) and oxalate(Co-OP) precipitation,solgel(Co-SG),and urea hydrothermal(Co-UH) methods,and their physicochemical properties were characterised by numerous techniques including X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen sorption,X-ray photoelectron spectroscopy(XPS),temperature-programmed reduction of H_(2)(H_(2)-TPR),temperature-programmed desorption of O_(2)(O_(2)-TPD),and temperature-programmed desorption of NH_(3)(NH_(3)-TPD).The catalytic activity of each catalyst was estimated for the catalytic combustion of vinyl chloride(VC) emissions.The crystallite size of the Co_(3) O_(4) catalyst was found to be well correlated with the amounts of surface-adsorbed oxygen species and number of acid sites on the catalyst surface,and consequently,determined several physicochemical properties of the catalyst.Of the catalysts studied here,the Co-AP catalyst exhibits the smallest crystallite size,which increases the specific surface area and the concentration of Co^(2+) on the catalyst surface.This,in turn,enhances the redox property,oxygen mobility,and the number of acid sites associated with the Co-AP catalyst.In fact,the Co-AP catalyst exhibits the best catalytic activity for VC combustion at 360℃and does not produce any chlorinated by-products.