Plasma catalytic hybrid processes: gas discharge initiation and plasma activation of catalytic processes
Plasma catalytic hybrid processes: gas discharge initiation and plasma activation of catalytic processes
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DOI：
10.1016/j.cattod.2003.11.001
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发表时间：
2004-02-29
期刊：
影响因子：
5.3
通讯作者：
Baldauf, M
中科院分区：
文献类型：
--
作者：
Hammer, T;Kappes, T;Baldauf, M
气体混合物的催化反应可以通过使用气体放电等离子体的预处理或通过在等离子体催化混合反应器中的组合处理来有效地诱导。采用介质阻挡放电（DBD）预处理柴油机尾气，在V_2O_5-WO_3/TiO_2-催化剂上实现了氮氧化物的选择性催化还原（SCR），温度可低至100 ℃。由于等离子体输入的比能量密度E较低，约10 J/l的P对气体加热不起作用。在介电填充床反应器中，在低至200 ℃的温度下，使用Ni催化剂进行等离子体催化甲烷水蒸气重整。由于对于重整E，P值超过1 kJ/l，非热等离子体效应和气体加热都有助于等离子体催化混合工艺。本文对等离子体化学动力学进行了综述。(C)2003 Elsevier B. V.保留所有权利。
Catalytic reactions of a gas mixture can efficiently be induced by pre-treatment using a gas discharge plasma or by combined treatment in a plasma catalytic hybrid reactor. The effects of plasma treatment can be excitation of molecules, formation of short lived radicals, formation of long lived intermediate species, emission of UV-radiation, or simply gas heating.By dielectric barrier discharge (DBD) pre-treatment of Diesel engine exhaust selective catalytic reduction (SCR) of nitric oxides on a V2O5-WO3/TiO2-catalyst could be induced at temperatures as low as 100degreesC. Due to the low specific plasma input energy density E,P of about 10 J/l gas heating does not play a role. Plasma catalytic methane steam reforming using a Ni-catalyst was performed in a dielectric packed bed reactor at temperatures down to 200degreesC. Since for reforming E,P values exceed 1 kJ/l both non-thermal plasma effects and gas heating contribute to the plasma catalytic hybrid process. A review focusing on the plasma-chemical kinetics is given. (C) 2003 Elsevier B.V. All rights reserved.