Removal of gas phase low-concentration toluene over Mn, Ag and Ce modified HZSM-5 catalysts by periodical operation of adsorption and non-thermal plasma regeneration.
Removal of gas phase low-concentration toluene over Mn, Ag and Ce modified HZSM-5 catalysts by periodical operation of adsorption and non-thermal plasma regeneration.
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DOI：
10.1016/j.jhazmat.2015.03.013
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发表时间：
2015-07
影响因子：
13.6
通讯作者：
Wenzheng Wang;Honglei Wang;Tianle Zhu;Xing Fan
中科院分区：
文献类型：
--
作者：
Wenzheng Wang;Honglei Wang;Tianle Zhu;Xing Fan
采用浸渍法制备了Ag/HZSM-5、Mn/HZSM-5、Ce/HZSM-5、Ag-Mn/HZSM-5和Ce-Mn/HZSM-5。通过定期运行吸附和低温等离子体再生，研究了它们的吸附能力和催化活性，用于去除气相低浓度甲苯。结果表明，负载Ag的催化剂（Ag/HZSM-5和Ag-Mn/HZSM-5）比其他催化剂对甲苯具有更大的吸附能力。 Ag-Mn/HZSM-5 对甲苯低温等离子体氧化和副产物抑制表现出最佳的催化性能。另一方面，当Ag-Mn/HZSM-5催化剂经过10次周期性吸附和非热再生循环后，其吸附容量和催化活性下降，失活的催化剂可以通过在空气流中煅烧来完全再生。
Ag/HZSM-5, Mn/HZSM-5, Ce/HZSM-5, Ag–Mn/HZSM-5 and Ce–Mn/HZSM-5 were prepared by impregnation method. Both their adsorption capacity and catalytic activity were investigated for the removal of gas phase low-concentration toluene by periodical operation of adsorption and non-thermal plasma regeneration. Results show that catalysts loaded with Ag (Ag/HZSM-5 and Ag–Mn/HZSM-5) had larger adsorption capacity for toluene than the other catalysts. And Ag–Mn/HZSM-5 displayed the best catalytic performance for both toluene oxidation by non-thermal plasma and byproducts suppression. On the other hand, the deactivated catalyst can be fully regenerated by calcining in air stream when its adsorption capacity and catalytic activity of the Ag–Mn/HZSM-5 catalyst was found to be decreased after 10 cycles of periodical adsorption and non-thermal regeneration.