La-Mn-Ce/γ-Al_2O_3纳米涂层材料的制备及催化性能

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英文篇名：Preparation and catalytic performance of La-Mn-Ce/γ-Al_2O_3 nano coating materials 作者：王昆 ; 李晶蕊 ; 张彤 英文作者：WANG Kun;LI Jing-rui;ZHANG Tong;Lanzhou Petrochemical Research Center,PetroChina;Synthetic Rubber Plant of Lanzhou Petrochemical Company,PetroChina; 关键词：纳米涂层材料 ; 堇青石蜂窝陶瓷 ; 载体 ; 催化剂 ; 甲苯 ; 转化率 ; 脱落率 英文关键词：nano coating material;;amaranthite honeycomb ceramic;;supporter;;catalyst;;toluene;;conversion;;expulsion rate 中文刊名：IZHM 英文刊名：Petrochemical Technology & Application 机构：中国石油兰州化工研究中心;中国石油兰州石化公司合成橡胶厂; 出版日期：2018-11-10 出版单位：石化技术与应用 年：2018 期：v.36;No.182 语种：中文; 页：IZHM201806005 页数：4 CN：06 ISSN：62-1138/TQ 分类号：24-27

摘要

采用研磨法、纳米溶胶混合法和原子掺杂改性法制备了La-Mn-Ce/γ-Al_2O_3纳米涂层材料。在堇青石蜂窝陶瓷孔道内表面涂覆所制备的涂层材料,以此为载体,采用等体积浸渍法制备出用于处理挥发性有机物的蜂窝陶瓷载体催化剂。结果表明:采用原子掺杂改性法合成的涂层材料单次涂覆质量分数为10. 8%,涂层脱落率低至0. 28%;选用甲苯与空气混合后配制成质量浓度为3 500 mg/m3的原料气,在温度为200～360℃,空速为15 000 h-1的条件下,当Pt-Pd合金负载质量分数为0. 3%时,随着反应温度的上升,不同催化剂作用下的甲苯转化率均提高;当转化率达到99%时,上述3种制备方法的反应温度依次为260,220,200℃;各种涂层材料制备的催化剂活性由高到低依次为原子掺杂改性法、纳米溶胶混合法、研磨法(2次涂覆)。
        La-Mn-Ce/γ-Al_2O_3 nano coating materials were prepared by the grinding method,nano sol mixing method and atomic doping modification method. The coating material prepared on cordierite honeycomb ceramic pore surface was used as the supporter,and honeycomb ceramic supporter catalyst for treating volatile organic compounds was prepared by the equal volume impregnation method. The results showed that the single coating mass fraction of the coating material synthesized by the atomic doping modification method was 10. 8% and coating expulsion rate was as low as 0. 28%,and mixture of toluene and air as raw gas with mass concentration3 500 mg/m3,at reaction temperature 200-360 ℃,and space velocity 15 000 h-1. When the mass fraction of the Pt-Pd alloy was 0. 3%,the conversion of toluene increased with the rising of reaction temperature. When the conversion reached 99%,the reaction temperature of the described three methods in the paper was 260,220,200 ℃ respectively,and catalytic activity of various coating materials decreased in the following order:atomic doping modification method,nano sol mixing method and grinding method( twice coating).

引文

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