文献类型：期刊文献

英文题名：Synthesis of W-Nb-O solid acid for catalytic combustion of low-concentration monochlorobenzene

作者：Tao, Hongyu[1];Li, Jing[2];Ma, Qianyi[3];Chen, Zhenyang[1];Zhang, Xiuwen[1];Quan, Yirao[1];Yang, Peng[1];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Shandong, Peoples R China;[3]Beijing Jiaotong Univ, Sch Sci, Beijing 100044, Peoples R China

年份：2020

卷号：382

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000503381200251)、、EI(收录号：20194207538258)、Scopus(收录号：2-s2.0-85073148406)、WOS

基金：The authors would like to acknowledge the financial supports from the Natural Science Foundation of Zhejiang Province (No. LQ19B030004), the Natural Science Foundation of China (No. 21906106, 11975157 and 11575117), the Scientific Research Program of Shaoxing University (No. 2016LG1005 and 20165008, controlled synthesis of Nb2O5 based mixed oxide materials for catalytic degradation of industrial organic pollutants), as well as the open-end fund from the Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process.

语种：英文

外文关键词：Catalytic combustion; Chlorinated aromatic hydrocarbon; Cooperative catalytic effect; Solid superacid; WO3-Nb2O5

外文摘要：WO3-Nb2O5 mixed oxides were prepared by citric acid based sol-gel method, and were tested for catalytic combustion of 1000 ppmv monochlorobenzene (MCB), as a typical chlorinated aromatic hydrocarbon in air pollution. Research results for the structure-function relationship revealed that the physicochemical properties of WO3-Nb2O5 were notably promoted than single component metal oxide, due to the strong electron interaction between W, Nb and O elements, which were confirmed by the techniques of H-2-TPR, positron lifetime spectra and XPS characterization. WO3-Nb2O5 were amorphous, in which W and Nb elements were homogeneous dispersed. The functionalized materials contributed to the improvement of adsorption, activation, cracking and deep oxidation of MCB on the catalyst surface, and only non-negligible production of CO byproduct was detected. Both the acid property and oxidative property played important roles in the catalytic degradation process, and their cooperative catalytic effect could be optimized by the catalyst composition and preparation process. 2W1Nb (W/Nb = 2:1, molar ratio) displayed the largest acid amount and the best redox property, and thus it displayed the highest catalytic degradation performance, and 50% conversion of MCB was achieved at 280 degrees C with the GHSV of 9000 mL g(cat)(-1) h(-1). Besides, in the 120 h continuous reaction, only slight decrease (from 91% to 86%) for the catalytic activity of 2W1Nb was observed in initial 7 h, showing that it was desired towards the demanding conditions (such as resistance to water adsorption, chlorine poison and carbon deposition). Moreover, the WO3-Nb(2)O(5 )materials also satisfied the environment-friendly and low-cost needs for environmental catalysis, which could be a promising alternative for traditional V2O5-WO3/TiO2 catalyst system.