Page 117 - 精细化工2019年第9期
P. 117
第 36 卷第 9 期 精 细 化 工 Vol.36, No.9
201 9 年 9 月 FINE CHEMICALS Sept. 2019
催化与分离提纯技术
Cu(x)/TiO 催化剂 NH -SCR 低温脱硝性能
2
3
1
1
刘晓刚 1,2 ,费浩天 ,刘奕绮 ,迟姚玲 1,2* ,孙巾茹 1,2 ,王 虹 1,2*
(1. 北京石油化工学院 化学工程学院,北京 102617;2. 燃料清洁化及高效催化减排技术北京市重点实
验室,北京 102617)
摘要:以硝酸铜和二氧化钛为原料,采用浸渍法制备 Cu(x)/TiO 2 (x 为以 TiO 2 载体质量为基准的铜负载量,下
同)催化剂。运用 XRD、XPS、NO-TPD、H 2 -TPR 等对催化剂进行了表征,在微型固定床反应器中评价了 Cu(x)/TiO 2
催化剂在以 NH 3 为还原剂的选择性催化还原 NO 反应(NH 3 -SCR)中的脱硝活性。结果表明,铜物种以 Cu 2 O
和 CuO 的形式共存于 TiO 2 载体上;铜负载量影响催化剂的脱硝性能;Cu(6)/TiO 2 催化剂(6 代表铜的负载量为
6%)表现出较好的氧化还原性和对反应物 NO 的吸附-脱附能力,低温脱硝活性较好,NO 转化率达到 85%和 95%
时对应反应温度 T 85 和 T 95 分别为 195 和 218 ℃,NO 转化率大于 95%的活性窗口温度为 218~270 ℃,宽度为
52 ℃。
关键词:铜;二氧化钛;一氧化氮;脱硝;催化技术
中图分类号:X701;TQ426 文献标识码:A 文章编号:1003-5214 (2019) 09-1845-05
Denitrification Performance of Cu(x)/TiO 2 Catalysts for Selective
Catalytic Reduction of NO with NH 3 at Low Temperature
1,2
1
1,2
1
LIU Xiao-gang , FEI Hao-tian , LIU Yi-qi , CHI Yao-ling 1,2* , SUN Jin-ru , WANG Hong 1,2*
(1. College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 2. Beijing
Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, Beijing 102617, China)
Abstract: Cu(x)/TiO 2 (x is the amount of copper loading based on the mass of TiO 2 carrier, the same below)
catalysts were prepared by impregnation method using copper nitrate and TiO 2 as raw materials. The
catalysts were characterized by XRD, XPS, NO-TPD and H 2-TPR. The performance of the catalysts for the
selective catalytic reduction of NO with NH 3 (NH 3-SCR) was evaluated in a fixed-bed micro-reactor. The
results showed that copper species existed in the form of Cu 2O and CuO on the TiO 2 carrier. The
denitrification performance of catalysts was affected by the amount of copper loading. The Cu(6)/TiO 2
catalyst(6 means the dosage of Cu is 6%) exhibited excellent redox properties and good adsorption/
desorption performance for reactants, which showed a good catalytic activity in denitrification reaction even
at low-temperature.When the conversion of NO reached 85% and 95%, the reaction temperature T 85 and T 95
were 195 ℃ and 218 ℃, respectively. The temperature range for the NO conversion over 95% was from
218 ℃ to 270 ℃ with a width of 52 ℃.
Key words: Cu; TiO 2; NO; denitrification; catalysis technology
氮氧化物(NO x )是大气主要污染物之一,主 人类健康,如何控制 NO x 排放成为近年来全世界环
[1]
要来源于火电厂和工业烟气。NO x 会产生光化学烟 境领域的研究热点 。国务院印发的《“十三五”节
雾,造成酸雨,破坏臭氧层,破坏生态环境,危害 能减排综合工作方案》明确了“十三五”期间节能
收稿日期:2018-12-13; 定用日期:2019-04-25; DOI: 10.13550/j.jxhg.20180918
基金项目:国家自然科学基金(U1662103,21673290);燃料清洁化及高效催化减排技术北京市重点实验室资助项目(BZ041420180007);
北京市大学生创新创业训练计划(2018J00035)
作者简介:刘晓刚(1992—),男,硕士生。联系人:迟姚玲(1976—),女,副教授,E-mail:chiyaoling@bipt.edu.cn;王 虹(1964
—),女,教授,电话:010-81292131,E-mail:wanghong@bipt.edu.cn。