Ti-Al-Si-Ox脱硝催化剂载体的组分优化及性能研究

doi:10.15541/jim20140563

无机材料学报 ›› 2015, Vol. 30 ›› Issue (5): 542-548.DOI: 10.15541/jim20140563 CSTR: 32189.14.10.15541/jim20140563

Ti-Al-Si-O_x脱硝催化剂载体的组分优化及性能研究

沈岳松, 纵宇浩, 眭国荣, 韩冰, 祝社民

(南京工业大学材料科学与工程学院, 南京210009)

收稿日期:2014-07-14 修回日期:2014-09-24 出版日期:2015-05-20 网络出版日期:2015-04-28
作者简介:沈岳松(1981–), 男, 副研究员. E-mail: sys-njut@163.com
基金资助:
国家自然科学基金(21106071, 51272105); 教育部博士点基金(20113221120004); 江苏省社会发展科技支撑计划(BE2013718); 江苏省环保科研课题(2012016); 江苏省优势学科资助(PAPD)

Component Optimization and Performance of Ti-Al-Si-O_x deNO_x Catalyst Carrier

SHEN Yue-Song, ZONG Yu-Hao, SUI Guo-Rong, HAN Bing, ZHU She-Min

(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China)

Received:2014-07-14 Revised:2014-09-24 Published:2015-05-20 Online:2015-04-28
About author:SHEN Yue-Song. E-mail: sys-njut@163.com
Supported by:
National Natural Science Foundation of China (21106071, 51272105); New Teachers’Fund for Doctor Stations Sponsored by the Ministry of Education of China (20113221120004); Jiangsu Provincial Science and Technology Supporting Program (BE2013718); Research Subject of Environmental Protection Department of Jiangsu Province of China (2012016); Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘要/Abstract

摘要：

采用挤出成型法制备系列Ti-Al-Si-O_x脱硝催化剂载体, 评价其NH₃选择性催化还原NO的活性。通过正交实验优化Ti-Al-Si-O_x配方, 采用液N₂-BET、ESEM及XRD分别表征载体的比表面积、孔容孔径分布、微观形貌和固相结构; 采用阿基米德法测试载体的吸水率、开气孔率和体积密度。结果表明, 当Ti/Al/Si摩尔比为1:0.2:0.1时, TiAl_0.2Si_0.1O_x载体NH₃-SCR脱除NO活性及轴向抗压碎强度匹配最好。当空速为7200 h^-1, 载体在450~550℃内NH₃-SCR脱除NO效率均＞80%, 494℃脱除NO效率达到最大值85.8%; 载体抗压碎强度为6.17 MPa, 比表面积为89.1 m²/g, 开气孔率达63.0%, 吸水率达48.3%, 介孔最可几分布为8.1 nm, 次可几分布为3.7 nm。TiAl_0.2Si_0.1O_x脱硝催化剂载体具备优异的性能。

关键词: Ti-Al-Si-O_x脱硝催化剂载体, 组分优化, 正交实验, 性能研究

Abstract:

A series of Ti-Al-Si-O_x deNO_x catalyst carriers were prepared by extrusion method and tested for selective catalytic reduction (SCR) of NO with NH₃. The Ti-Al-Si-O_x formulas were designed and optimized by orthogonal experiments, and the specific surface area, pore volume and size distributions, micro-morphology and solid-phase structure of the carriers were characterized by N₂-BET, ESEM and XRD, respectively. Moreover, the water adsorption, open porosity and bulk density of the carriers were measured by Archimedes method. Results showed that the catalytic activity for NH₃-SCR of NO and the axial crush strength of the TiAl_0.2Si_0.1O_x carrier matched the best when the Ti/Al/Si molar ratio was equal to 1:0.2:0.1. Under gas hourly space velocity (GHSV) of 7200 h^-1, the TiAl_0.2Si_0.1O_x obtained more than 80% NO removal in active temperature range of 450-550℃, and obtained the maximum catalytic activity of 85.8% at 494℃. The axial crushing strength of the TiAl_0.2Si_0.1O_x was 6.17 MPa, its specific surface area was 89.1 m²/g, its open porosity was 63.0%, its water adsorption was 48.3%, the most probable meso pore distribution was 8.1 nm and the second probable pore distribution was 3.7 nm. In conclusion, the TiAl_0.2Si_0.1O_x deNOx catalyst carrier possesses excellent performance.

Key words: Ti-Al-Si-O_x deNO_x catalyst carrier, component optimization, orthogonal experiment, performance study

中图分类号:

X701

沈岳松, 纵宇浩, 眭国荣, 韩冰, 祝社民. Ti-Al-Si-O_x脱硝催化剂载体的组分优化及性能研究[J]. 无机材料学报, 2015, 30(5): 542-548.

SHEN Yue-Song, ZONG Yu-Hao, SUI Guo-Rong, HAN Bing, ZHU She-Min. Component Optimization and Performance of Ti-Al-Si-O_x deNO_x Catalyst Carrier[J]. Journal of Inorganic Materials, 2015, 30(5): 542-548.

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Ti-Al-Si-O_x脱硝催化剂载体的组分优化及性能研究

Component Optimization and Performance of Ti-Al-Si-O_x deNO_x Catalyst Carrier

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Ti-Al-Si-O_x脱硝催化剂载体的组分优化及性能研究

Component Optimization and Performance of Ti-Al-Si-O_x deNO_x Catalyst Carrier