金属阳离子对高硅分子筛催化氧化NO的影响

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Abstract

A series of HZSM-5、Na-、K-、Co-、NiZSM-5catalysts were prepared by ion exchanged method and characterized by XRD、BET、ICP-MS and Py-IR. Their catalytic activities were investigated in the catalytic oxidation of NO. Results showed that the CoZSM-5possessed moderate surface acidity and was the most beneficial for NO oxidation, then performed highest activity to 47%. Meanwhile, the influences of space velocity, O₂ concentration (5%~20%) and SO₂ concentration (0~200×10^-6) were investigated, under 600×10^-6 inlet NO concentration and 100% RH. Experimental results revealed that SO₂ concentration (below 200×10^-6) had little impact on NO oxidation reaction and the NO oxidation conversion was maintained at 40% in 56h lifetime test, under 30℃、600ppm NO、18000h^-1 SV and 100% RH.

Key words： NO oxidation ion exchanged method CoZSM-5 water resistance surfur tolerance

Received: 18 September 2017

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	Articles by authors
	ZHOU Fei-xiang
	WANG Jun
	QIAN Ding-li
	WU Xiang-hao
	LIU Hua-yan
	LU Han-feng

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ZHOU Fei-xiang,WANG Jun,QIAN Ding-li等. Influence of metal cations on catalytic oxidation of NO over high-silica zeolites[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1287-1294.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I4/1287

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