Pd-ZrO2/Al2O3 催化剂对丙烯选择性催化还原 NO 的催化活性研究

doi:10.3724/SP.J.1077.2011.00311

无机材料学报 ›› 2011, Vol. 26 ›› Issue (3): 311-316.DOI: 10.3724/SP.J.1077.2011.00311 CSTR: 32189.14.SP.J.1077.2011.00311

Pd-ZrO₂/Al₂O₃ 催化剂对丙烯选择性催化还原 NO 的催化活性研究

王玉东¹, ², 张豪杰², 何丹农*¹, ²

1. 上海交通大学,材料科学与工程学院, 上海 200240; 2. 纳米技术及应用国家工程研究中心, 上海 200241

收稿日期:2010-05-31 修回日期:2010-08-18 出版日期:2011-03-20 网络出版日期:2011-02-18
作者简介:王玉东(1987-), 男, 硕士研究生
基金资助:
国家科技支撑计划(2007BAJ03B00)

Selective Catalytic Reduction of NO with Propylene over Pd-ZrO₂/Al₂O₃catalysts Catalysts

WANG Yu-dong¹,²,ZHANG Hao-Jie², HE Dan-nong¹,²

1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2.Ntional Engineering Research Center for Nanotechnology, Shanghai 200241, China

Received:2010-05-31 Revised:2010-08-18 Published:2011-03-20 Online:2011-02-18
Supported by:
National Key Technology R&D Program (2007BAJ03B00)

摘要/Abstract

摘要： 采用浸渍法制备了具有高比表面积的氧化铝负载的Pd-ZrO₂复合物催化剂( Pd-ZrO₂/Al₂O₃ ),利用BET、XRD、TEM等手段研究了该复合物催化剂的物理特性, 并重点研究了该复合物催化剂对以C₃H₆为还原剂选择性催化还原 (SCR) NO的催化反应活性, 分别讨论了反应温度、组分、焙烧温度、原料气组分、空速等因素对该催化反应的影响. 结果发现, 少量的Pd纳米粒子均匀分散于载体氧化铝上, 添加适量ZrO₂后, 所制备的低负载量的Pd(1 wt％)-ZrO₂(2wt％)/Al₂O₃复合物催化剂具有较高的NO选择性催化还原反应活性, 在240～250℃可使NO的转化率达到50%～70%. 其活性提高的机制在于适量ZrO₂的添加增强了反应物中NO和C₃H₆在催化剂表面的吸附, 同时与Pd催化剂形成一种协同催化的作用.

关键词: 选择催化还原, 丙烯, NO转化率, 二氧化锆

Abstract: An alumina supported Pd-ZrO₂ catalyst with high surface area was synthesized by impregnation method and characterized byBET, XRD and TEM techniques. The catalytic activity of the catalyst onselective catalytic reduction (SCR) of NO with C₃H₆ as reducer was studied, and the influence of the reaction temperature, catalyst component, calcination temperature, reactant ratio and space velocity on the catalytic activity were investigated, respectively. The results indicated that the Pd nano-particles had been dispersed evenly on the Al₂O₃support, and a dding withfter appropriate amount of ZrO₂ addition, the obtained compound catalyst 1 wt％Pd-2 wt％ZrO₂/Al₂O₃showed high catalytic activity on NO selective catalytic reduction reaction,and the NO conversion could reached 50 wt %-70 wt% in the temperature range of 240-250℃. The improvement of NO conversion is ascribed to the ZrO₂ loaded on the catalysts, which can The ZrO₂loaded on the catalysts could promote the adsorption of NO and C₃H₆on the catalyst surface, a synergetic catalytic effect between Pd and ZrO₂has been proposed. .

Key words: selectivecatalyst reduction (SCR), C₃H₆, NO conversion, ZrO₂

中图分类号:

X511

王玉东, 张豪杰, 何丹农. Pd-ZrO₂/Al₂O₃ 催化剂对丙烯选择性催化还原 NO 的催化活性研究[J]. 无机材料学报, 2011, 26(3): 311-316.

WANG Yu-dong,,ZHANG Hao-Jie, HE Dan-nong,. Selective Catalytic Reduction of NO with Propylene over Pd-ZrO₂/Al₂O₃catalysts Catalysts [J]. Journal of Inorganic Materials, 2011, 26(3): 311-316.

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Pd-ZrO₂/Al₂O₃ 催化剂对丙烯选择性催化还原 NO 的催化活性研究

Selective Catalytic Reduction of NO with Propylene over Pd-ZrO₂/Al₂O₃catalysts Catalysts

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