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	Towards eco-integration - Ecopolis planning in China
	Wang, RS
	2004
会议名称	1st China/Japan Workshop on Environmental Catalysis and Eco-Materials
会议日期	OCT 07-10, 2003
会议地点	Beijing, PEOPLES R CHINA
关键词	selective ammonia oxidation nitrogen copper silver DRIFTS
英文摘要	A novel catalyst based on copper-silver was developed to solve the contradiction between the high conversion temperature of Cu-based catalyst and low N-2 selectivity of Ag-based catalyst during selective oxidation of ammonium gas. The Cu-Ag-based catalyst (Cu 5 wt.%-Ag 5 wt.%/Al2O3) displayed a relatively low complete conversion temperature (<320degreesC) with a high N2 selectivity (>95%). Increasing loading of Cu and Ag decreases N2 selectivity. The low N2 selectivity of Ag-based catalyst is possibly related to the formation of Ag2O crystals. Improvement of N2 selectivity of Ag-based catalyst was obtained by doping Cu to decrease crystallized Ag2O phase. The temperature programmed reaction (TPR) data show that N2O is the main byproduct of oxidation of ammonia at temperature lower than 200degreesC. Two bands of nitrate species at 1541 and 1302 cm(-1) were observed on Ag 10 wt.%/Al2O3 at the temperature higher than 250degreesC, which indicates the formation of NOx during the selective catalytic oxidation of ammonia. No nitrate species was observed on Cu 10wt.%/Al2O3 and Cu 5 wt.%-Ag 5 wt.%/Al2O3, while only one nitrate species (1543 cm(-1)) existed on Cu 10 wt.%-Ag 10 wt.%/Al2O3. We proposed that mixing Ag with Cu inhibited the formation of NOx during the selective catalytic oxidation of ammonia over Cu-Ag/Al2O3 (C) 2004 Elsevier B.V. All rights reserved.
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24786]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, RS. Towards eco-integration - Ecopolis planning in China[C]. 见:1st China/Japan Workshop on Environmental Catalysis and Eco-Materials. Beijing, PEOPLES R CHINA. OCT 07-10, 2003.

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