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首页> 外文期刊>Catalysis science & technology >Cycled storage-discharge (CSD) plasma catalytic removal of benzene over AgMn/HZSM-5 using air as discharge gas
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Cycled storage-discharge (CSD) plasma catalytic removal of benzene over AgMn/HZSM-5 using air as discharge gas

机译：骑车storage-discharge (CSD)等离子体催化去除苯随着AgMn / HZSM-5使用空气排放气体

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Cycled storage-discharge (CSD) plasma catalytic removal of benzene (C6H6) using air as the discharge gas over AgMn/HZSM-5 (AgMn/HZ) catalyst is reported in this study. The properties of AgMn/HZ catalyst were compared with HZ, Mn/HZ, and Ag/HZ catalysts in investigations of C6H6 storage capacity and plasma catalytic oxidation of stored C6H6. Among HZ, Mn/HZ and Ag/HZ catalysts, the AgMn/HZ catalyst possessed the highest breakthrough capacity of C6H6, which is almost twice than that of the unsupported HZ zeolite. For the AgMn/HZ catalyst, stored C6H6 is oxidized completely to CO2 due to the promoting effect of Ag and MnOx. On the other hand, this accelerates the oxidation rate of stored C6H6 during plasma oxidation of stored C6H6. The effects of discharge parameters on plasma oxidation of stored C6H6 over the AgMn/HZ catalyst are discussed. During the CSD process, under conditions of similar to 20000 mL h(-1) g(-1) space velocity, 6 W of input power, 0.4 vol% of absolute humidity and 24 min of discharge, the stored C6H6 conversion increased rapidly with cycle number during the first three cycles and nearly all stored C6H6 could be oxidized into CO2 thereafter. In addition, CO2 selectivity was maintained at around 100% and only a small amount of N2O (40-50 ppm) was detected during all five cycles. Temperature-programmed desorption of adsorbed C6H6 on the used AgMn/HZ catalyst indicates that the minor Ag sites, which are highly active, cannot be renewed by the air plasma, but the major Ag sites, which are normally active, are renewable. This explains the variation of stored C6H6 conversion with cycle number.
机译：骑车storage-discharge (CSD)等离子体催化去除苯(苯)使用空气作为放电气体通过AgMn / HZSM-5 (AgMn / HZ)催化剂在这个研究报告。AgMn / HZ催化剂与赫兹相比,Mn /赫兹,和Ag / HZ催化剂在苯的调查存储容量和等离子体催化氧化存储C6H6。催化剂,AgMn / HZ催化剂拥有苯的最高突破能力几乎比不支持的赫兹的两倍沸石。由于促进氧化完全二氧化碳Ag)和MnOx的效果。加速存储苯的氧化率在等离子体氧化苯存储。放电参数对等离子体的影响存储在AgMn苯氧化/ HZ讨论了催化剂。类似于20000毫升h的条件下(1)g(1)空间速度,6 W的输入功率,0.4卷%的绝对湿度和24分钟放电,存储苯转化率增加在前三个快速与周期数周期和几乎所有存储苯氧化成二氧化碳。选择性是保持在100%左右只有少量的一氧化二氮(40 - 50 ppm)发现在所有五个周期。程序升温解吸吸附的苯在使用AgMn / HZ表明催化剂小公司网站,这是高度活跃的,不能更新空气等离子体,但是主要Ag)网站通常是积极的,可再生。苯转化与循环数。

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