NaY分子筛担载FeSO4催化剂用于氨气还原NOx的性能

摘要/Abstract

摘要：

研究了分子筛担载FeSO₄催化剂在SCR脱硝反应中的催化性能和反应机理。实验结果表明，在同等工况下分子筛担载FeSO₄后的催化剂具有更好的物理结构，与纯FeSO₄相比脱硝率可提高将近20%。经Mossbauer谱分析，催化剂制备过程中Fe²⁺转化为Fe³⁺，其具体存在形式为Fe (OH)SO₄与Fe₂O(SO₄)₂，前者催化脱硝效果优于后者。原位红外分析结果表明，吸附在分子筛担载催化剂表面的氨与气相中的NO反应，Fe离子是吸附及发生催化氧化还原反应的活性中心。与钒、钛系

关键词: 脱硝；选择性催化还原；分子筛；FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">FeSO₄FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">催化剂；空速

Abstract:

This paper focuses on the NO reduction by ammonia via FeSO₄ catalyst supported by molecular sieve in a fixed bed reactor at 400℃.The experimental results indicate that the catalyst has immediate catalytic effect on NO reduction.Due to its improved physical structure, the catalyst improves the NO reduction rate by 20% compared with pure FeSO₄.The effects of preparation conditions on catalytic activity, including the mix ratio, impregnation agent and impregnation time etc., are investigated. Mossbauer spectroscopy is used for the study.It is found that Fe2+ is oxidized to Fe³⁺ during the preparation and most FeSO₄ is transferred to Fe(OH)SO₄ and Fe₂O (SO₄)₂.Fe(OH)SO₄ is better than the other speices in NO reduction and the ratio of different species is related to the water and oxygen content in atmosphere.The results of in-situ FTIR indicate that Fe is the reaction centre.NH₃ is absorbed on the catalyst and reacts with NO, which can be explained by Eley-Rideal mechanism.Compared with other commercial catalysts, FeSO₄ demonstrates great industrial potentials because of its low cost and excellent catalytic effect at high space velocity.

Key words: 脱硝；选择性催化还原；分子筛；FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">FeSO₄FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">催化剂；空速

任雯, 赵博, 禚玉群, 陈昌和. NaY分子筛担载FeSO₄催化剂用于氨气还原NO_x的性能 [J]. 化工学报, 2011, 62(2): 362-368.

REN Wen, ZHAO Bo, ZHUO Yuqun, CHEN Changhe.

Capability of molecular sieve-supported FeSO₄catalystfor selective catalytic reduction of NO_x[J]. CIESC Journal, 2011, 62(2): 362-368.

[1]	褚燕彬, 曹柳林, 王晶. 利用组合B样条神经网络实现对间歇反应过程的动态建模 [J]. 化工学报, 2011, 62(S1): 157-162.
[2]	曾庆, 郭印诚, 牛振祺, 林文漪. 填料塔中氨水吸收二氧化碳的传质性能 [J]. 化工学报, 2011, 62(S1): 146-150.
[3]	张艾萍, 谢立强, 徐志明. 超声空化对换热器协同场的影响 [J]. 化工学报, 2011, 62(S1): 130-133.
[4]	吴海波, 方岩雄, 纪红兵. 助溶剂促进的β-环糊精与肉桂醛的包结性能 [J]. 化工学报, 2011, 62(S1): 168-173.
[5]	王建立, 朱建军, 宋辰兴, 张兴. 3ω法测量纳米流体热导率 [J]. 化工学报, 2011, 62(S1): 42-47.
[6]	马维刚, 王海东, 张兴, 王玮. 多晶金薄膜电子-声子耦合的实验研究 [J]. 化工学报, 2011, 62(S1): 48-53.
[7]	崔福庆, 何雅玲, 程泽东, 李东, 陶于兵. 有压腔式吸热器内辐射传播过程的Monte Carlo模拟 [J]. 化工学报, 2011, 62(S1): 60-65.
[8]	何奎, 汪双凤, 黄间珍. 气液两相流在微小T型三通中的相分配特性 [J]. 化工学报, 2011, 62(S1): 92-96.
[9]	刘绩伟, 吴玉庭, 马重芳. 管肋式空间辐射器设计 [J]. 化工学报, 2011, 62(S1): 103-107.
[10]	李旺, 王情愿, 李瑞龙, 李超, 宇波, 张劲军, 代鹏飞. 大型浮顶油罐温度场数值模拟 [J]. 化工学报, 2011, 62(S1): 108-112.
[11]	胡朝发, 贾力. 脉动热管气液塞振荡运动模型 [J]. 化工学报, 2011, 62(S1): 113-117.
[12]	任楠, 王涛, 吴玉庭, 马重芳. 混合碳酸盐的DSC测量与比热容分析 [J]. 化工学报, 2011, 62(S1): 197-202.
[13]	王勤辉，杨秋辉，吴学成，骆仲泱，岑可法. 多相流中颗粒旋转运动特性的研究进展 [J]. CIESC Journal, 2011, 62(9): 2381-2390.
[14]	刘夺, 杜瑾, 赵广荣, 元英进. 合成生物学在医药及能源领域的应用 [J]. 化工学报, 2011, 62(9): 2391-2397.
[15]	马淳安，储诚普，徐颖华，张虹. 3,6-二氯吡啶甲酸合成方法进展 [J]. CIESC Journal, 2011, 62(9): 2398-2405.

NaY分子筛担载FeSO₄催化剂用于氨气还原NO_x的性能

Capability of molecular sieve-supported FeSO₄catalystfor selective catalytic reduction of NO_x

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价