Component Optimization and Performance of Ti-Al-Si-Ox deNOx Catalyst Carrier

doi:10.15541/jim20140563

Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (5): 542-548.DOI: 10.15541/jim20140563

• Research Paper • Previous Articles Next Articles

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)

Abstract

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

CLC Number:

X701

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

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