Fe2O3/AC催化剂的低温选择性催化还原脱硝性能

doi:10.12034/j.issn.1009-606X.217251

过程工程学报 ›› 2018, Vol. 18 ›› Issue (2): 330-336.DOI: 10.12034/j.issn.1009-606X.217251

Fe2O3/AC催化剂的低温选择性催化还原脱硝性能

尹寿来，朱宝忠?，孙运兰，操政，陈光，江汝清，徐天宇，刘锋

安徽工业大学能源与环境学院，安徽马鞍山 243002

收稿日期:2017-06-05 修回日期:2017-08-09 出版日期:2018-04-22 发布日期:2018-04-10
通讯作者: 朱宝忠 baozhongzhu@163.com
基金资助:
焦化能量系统耦合优化、节能设备及排放物协同治理技术

Low-temperature Selective Catalytic Reduction of NOx with Ammonia over Fe2O3/AC Catalysts

Shoulai YIN, Baozhong ZHU^*, Yunlan SUN, Zheng CAO, Guang CHEN, Ruqing JIANG, Tianyu XU, Feng LIU

School of Energy and Environment, Anhui University of Technology, Ma?anshan, Anhui 243002, China

Received:2017-06-05 Revised:2017-08-09 Online:2018-04-22 Published:2018-04-10

摘要/Abstract

摘要： 以活性焦(AC)为载体、Fe2O3为活性组分，采用等体积浸渍法制备Fe2O3/AC催化剂，研究了Fe含量对Fe2O3/AC催化剂低温脱硝性能的影响. 结果表明，当Fe负载量为6wt%时能获得比其它负载量更佳的NOx转化率，尤其在240℃时NOx转化率达93.9%，当分别有120?10?6(vol) SO2和3.5vol H2O存在时，脱硝率分别稳定在约86%和74%；催化剂孔径≤4 nm，随Fe负载量增加，孔径呈增大趋势；催化剂较稳定；Fe主要以γ-Fe2O3分散在催化剂表面，负载适量Fe2O3使表面吸附氧Oβ和Fe3+增多，为催化剂提供更多活性位，提高了Fe2O3/AC催化剂的低温选择性催化还原脱硝活性.

关键词: γ-Fe2O3, 活性焦, 低温, SCR

Abstract: Activated coke (AC) loaded with various amounts Fe was prepared via impregnation method to investigate the effect of iron content on the denitrification performance at low temperature. The results showed that the Fe2O3/AC catalyst with 6wt% Fe addition exhibits the best NOx conversion rate, which reached 93.9% at 240℃, the NOx conversion rate of the catalyst are about 86% and 7% when there are 120?10?6 (vol) SO2 and 3.5vol% H2O, respectively. The pore sizes of these catalysts are less than 4 nm, and increase with the increasing of Fe loading. These catalysts are stable. Fe is mainly existed as γ-Fe2O3 which disperses on the catalyst surface. A certain amount of Fe2O3 on the AC surface increase the contents of Oβ and Fe3+, and provide more active sites, so the selective catalytic reduction (SCR) denitrification performance of the catalyst is improved.

Key words: γ-Fe2O3, Activated coke (AC), low temperature, SCR

尹寿来朱宝忠孙运兰操政陈光江汝清徐天宇刘锋. Fe2O3/AC催化剂的低温选择性催化还原脱硝性能[J]. 过程工程学报, 2018, 18(2): 330-336.

Shoulai YIN Baozhong ZHU Yunlan SUN Zheng CAO Guang CHEN Ruqing JIANG Tianyu XU Feng LIU. Low-temperature Selective Catalytic Reduction of NOx with Ammonia over Fe2O3/AC Catalysts[J]. Chin. J. Process Eng., 2018, 18(2): 330-336.

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Fe2O3/AC催化剂的低温选择性催化还原脱硝性能

Low-temperature Selective Catalytic Reduction of NOx with Ammonia over Fe2O3/AC Catalysts

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