Effect of metal sulfate and oxide additives on performance of SCR denitration catalyst

doi:10.3969/j.issn.0438-1157.2013.09.020

CIESC Journal ›› 2013, Vol. 64 ›› Issue (9): 3220-3227.DOI: 10.3969/j.issn.0438-1157.2013.09.020

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Effect of metal sulfate and oxide additives on performance of SCR denitration catalyst

MU Yang^1,2, YANG Juan¹, YU Jian¹, GUO Feng^1,3, LIU Yunyi², XU Guangwen¹

1. National Key Laboratory of Multiphase Complex System, Institute of Process Engineering, CAS, Beijing 100190, China;
2. School of Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, Liaoning, China;
3. School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China

Received:2013-01-11 Revised:2013-04-26 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the National Natural Science Foundation of China(21106156),the High-tech Research and Development Program of China(2010AA065004)and the Strategic Priority Research Program of CAS(XDA070300).

金属硫酸盐与氧化物助剂对SCR脱硝催化剂性能的影响

牟洋^1,2, 杨娟¹, 余剑¹, 郭凤^1,3, 刘云义², 许光文¹

1. 中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190;
2. 沈阳化工大学化学工程学院, 辽宁沈阳 110142;
3. 中国矿业大学化学与环境工程学院, 北京 100083

通讯作者: 余剑, 许光文
作者简介:牟洋(1987- ),女,硕士研究生。
基金资助:
国家自然科学基金项目(21106156);国家高技术研究发展计划项目(2010AA065004);中国科学院战略性先导科技专项(XDA070300)。

Abstract

Abstract: Several low-vanadium SCR catalysts with alkaline-earth metal and transition metal sulfate(V-M_x(SO₄)_y-W/Ti)or oxide(V-M_xO_y-W/Ti)additives were prepared by the impregnation method and evaluated to investigate the effects of the additives on the denitration performance of the catalysts.The results showed that whatever additive it was,the SCR denitration activity of the catalysts doped with metal sulfates was much higher than that doped with metal oxides.Cobalt additive had higher SCR denitration activity in a wide temperature range and showed also good resistance to the poisoning of SO₂ and H₂O.Characterized by XRD,NH₃-TPD,H₂-TPR,TG and BET,the catalysts with higher catalytic activity for denitration at a low temperature,such as V-CoSO₄-W/Ti,showed always higher surface acidity and better low-temperature reduction ability.

Key words: metal sulfate additive, metal oxide additive, alkaline-earth metal, transition metal, denitration catalyst, selective catalytic reduction

摘要： 通过分步浸渍法制备了一系列以碱土金属或过渡金属为助剂,低钒含量的V-M_x(SO₄)_y-W/Ti及V-M_xO_y-W/Ti催化剂,对负载相同金属离子硫酸盐及氧化物的催化剂性质进行了对比考察。通过选择性催化还原(SCR)反应对催化剂进行活性评价,结果显示,负载某金属硫酸盐比相应氧化物助剂的催化剂活性好。负载钴离子的催化剂具有良好的低温活性,进而对负载钴离子的催化剂进行了抗硫抗水性能测试,并借助XRD、NH₃-TPD、H₂-TPR、TG、BET对负载不同金属硫酸盐及氧化物助剂的催化剂进行了表征,揭示了活性好的催化剂(如负载CoSO₄的催化剂)通常具有较多的表面酸及较好的低温还原能力。

关键词: 金属硫酸盐助剂, 金属氧化物助剂, 碱土金属, 过渡金属, 脱硝催化剂, 选择性催化还原

CLC Number:

TQ426.98

MU Yang, YANG Juan, YU Jian, GUO Feng, LIU Yunyi, XU Guangwen. Effect of metal sulfate and oxide additives on performance of SCR denitration catalyst[J]. CIESC Journal, 2013, 64(9): 3220-3227.

牟洋, 杨娟, 余剑, 郭凤, 刘云义, 许光文. 金属硫酸盐与氧化物助剂对SCR脱硝催化剂性能的影响[J]. 化工学报, 2013, 64(9): 3220-3227.

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Effect of metal sulfate and oxide additives on performance of SCR denitration catalyst

金属硫酸盐与氧化物助剂对SCR脱硝催化剂性能的影响

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