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2015年 第9卷 第6期

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《环境科学与工程前沿（英文）》 >> 2015年 第9卷 第6期 doi: 10.1007/s11783-015-0824-8

Development of highly active coated monolith SCR catalyst with strong abrasion resistance for low-temperature application

1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.2. University of Chinese Academy of Sciences, Beijing 100049, China.3. Materials Research Department, Materials Research Laboratories, Research and Development Group, Meidensha Corporation, 8-1, Osaki 2-Chome Shinagawa-ku, Tokyo 141-8565, Japan.4. National Institute of Advanced Industrial Science and Technology (AIST), Onogawa 16-1, Tsukuba 305-8569, Japan

录用日期： 2015-11-16 发布日期： 2015-11-23
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Monolith SCR catalysts coated with V O -WO /TiO were prepared by varying binder and coating thickness. Comparing with a monolith extruded with 100% V O -WO /TiO powder, a coated monolith with a catalyst-coating layer of 260 μm in thickness exhibited the similar initial NO reduction activity at 250°C. After 4 h abrasion (attrition) in an air stream containing 300 g·m fine sands (50–100 μm) at a superficial gas velocity of 10 m·s , the catalyst still has the activity as a 100% molded monolith does in a 24-h activity test and it retains about 92% of its initial activity at 250°C. Estimation of the equivalent durable hours at a fly ash concentration of 1.0 g·m in flue gas and a gas velocity of 5 m·s demonstrated that this coated monolith catalyst is capable of resisting abrasion for 13 months without losing more than 8% of its initial activity. The result suggests the great potential of the coated monolith for application to de-NO of flue gases with low fly ash concentrations from, such as glass and ceramics manufacturing processes.

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