文献类型：期刊文献

英文题名：Catalytic combustion of vinyl chloride emissions over Co3O4catalysts with different crystallite sizes

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

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：40

期号：4

起止页码：817

外文期刊名：RARE METALS

收录：;EI(收录号：20203509102443);WOS:【SCI-EXPANDED(收录号:WOS:000562334500002)】；

基金：This work was 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) and the Fundamental Research Funds for the Central Universities (No. 222201717003).

语种：英文

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

摘要：A series of Co3O4 catalysts was prepared by ammonia (Co-AP) and oxalate (Co-OP) precipitation, sol-gel (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 NH3(NH3-TPD). The catalytic activity of each catalyst was estimated for the catalytic combustion of vinyl chloride (VC) emissions. The crystallite size of the Co3O4 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 degrees C and does not produce any chlorinated by-products. [GRAPHICS] .