Catalytic reduction of nitrogen oxides with methane in the presence of excess oxygen: A review
Catalytic reduction of nitrogen oxides with methane in the presence of excess oxygen: A review
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DOI：
10.1016/0920-5861(95)00134-2
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发表时间：
1992-12
期刊：
影响因子：
5.3
通讯作者：
J. Armor
中科院分区：
文献类型：
--
作者：
J. Armor
由于发现某些沸石对C2和C3分解和还原NO非常有活性，激发了人们对脱除NO新方法的兴趣。最初，NO不能用甲烷还原，这是早期的沸石。后来发现Co-ZSM-5在O2存在下对甲烷还原NOx表现出独特的高活性。考虑到世界上丰富的天然气供应，甲烷肯定是减少NO的首选烃。自从Co-ZSM-5的突破性工作以来，据报道，许多其他材料都是该反应的催化剂。本文综述了这一领域的工作，并试图将所有这些潜在的催化剂的活动。关于许多这些较新催化剂的相对性能的直接比较并不总是可能的，通常是因为没有报告速率并且数据是在不同条件下收集的。根据目前掌握的信息，在模拟的无硫、湿排气条件下，最具活性的催化剂似乎是钴镁碱沸石。
Interest in new approaches to NOxremoval were stimulated by the discovery that certain zeolites were very active for NO decomposition and reduction by C2sand C3s. Initially, NO could not be reduced by methane with this early generation of zeolites. Later it was discovered that Co-ZSM-5 demonstrated uniquely high activity for NOxreduction by methane in the presence of O2. Given the world's plentiful supply of natural gas, methane would certainly be a hydrocarbon of choice to reduce NO. Since the breakthrough work with Co-ZSM-5, a number of other materials were reported to be catalysts for this reaction. This review summarizes the work in this topical area and attempts to relate the activities of all these potential catalysts. Direct comparisons regarding the relative performance of many of these newer catalysts are not always possible, often because rates are not reported and the data are collected under different conditions. With the current information at hand, it appears that the most active catalyst under simulated sulfur-free, wet exhaust conditions is Co-ferrierite.