Total oxidation of toluene on Pt/CeO2-ZrO2-Bi2O3/γ-Al2O3 catalysts prepared in the presence of polyvinyl pyrrolidone
Total oxidation of toluene on Pt/CeO2-ZrO2-Bi2O3/γ-Al2O3 catalysts prepared in the presence of polyvinyl pyrrolidone
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DOI：
10.1016/j.jhazmat.2009.11.108
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发表时间：
2010-04-15
影响因子：
13.6
通讯作者：
Imanaka, Nobuhito
中科院分区：
文献类型：
--
作者：
Masui, Toshiyuki;Imadzu, Hayato;Imanaka, Nobuhito
以聚乙烯吡咯烷酮（PVP）为催化剂，采用湿法浸渍法制备了Pt/CeO 2-ZrO 2-Bi 2 O3/γ-Al 2 O3（Pt/CZB/Al 2 O3）催化剂，用于催化燃烧挥发性有机物甲苯。采用X射线粉末衍射、透射电子显微镜和BET比表面积测定等手段对催化剂进行了表征。催化试验从室温在空气中900 ppm甲苯的气流和8000 h（-1）的气时空速（GHSV）中进行。根据C7 H8转化率评价催化活性，并使用具有火焰离子化检测器（FID）和热导检测器（TCD）的两个气相色谱仪分析反应后的气体组成。Pt/CZB/Al_2O_3催化剂对总甲苯氧化具有特异性，未检测到CO和任何甲苯衍生物化合物作为副产物。在制备过程中加入PVP可提高催化剂的比表面积。通过优化铂的用量，在7wt%Pt/16wt%Ce_（0.64）Zr_（0.15）Bi_（0.21）O_（1.895）/γ-Al_2 O_3催化剂上，甲苯在120 ℃的低温下完全氧化。(C)2009 Elsevier B. V.保留所有权利。
Pt/CeO2-ZrO2-Bi2O3/gamma-Al2O3 (Pt/CZB/Al2O3) catalysts for the catalytic combustion of toluene, which is one of the volatile organic compounds (VOCs), were prepared by the wet impregnation method in the presence of polyvinyl pyrrolidone (PVP). X-ray powder diffraction, transmission electron microscopy, and BET specific surface area measurement using N-2 adsorption have been used to characterize the catalysts. The catalytic test was conducted from room temperature in a flow of 900 ppm of toluene in air and gas hourly space velocity (GHSV) of 8000 h(-1). The catalytic activity was evaluated in terms of C7H8 conversion and the gas composition after the reaction was analyzed using two gas chromatographs with a flame ionization detector (FID) and a thermal conductivity detector (TCD). The Pt/CZB/Al2O3 catalysts are specific for the total toluene oxidation and CO and any toluene-derivative compounds were not detected as by-products. The specific surface area of the catalysts was increased by the addition of PVP in the preparation process. By the optimization of the amount of platinum, complete oxidation of toluene was realized at a temperature as low as 120 degrees C on a 7 wt%Pt/16wt%Ce0.64Zr0.15Bi0.21O1.895/gamma-Al2O3 catalyst. (C) 2009 Elsevier B.V. All rights reserved.