Preparation and Characterization of Mesoporous CuO/ZSM-5 Catalysts for Automotive Exhaust Purification

被引：57

作者：

Shi, Zhengjun ^{[1
]}

Wu, Chunhua ^{[1
]}

Gu, Yongwan ^{[2
]}

Liang, Yi ^{[1
]}

Xu, Gaofeng ^{[1
]}

Liu, Hu ^{[3
,4
]}

Zhang, Jiaoxia ^{[5
,6
]}

Hou, Hua ^{[7
]}

Zhang, Jiayan ^{[1
]}

Guo, Zhanhu ^{[5
]}

机构：

[1] Southwest Forestry Univ, Minist Educ, Key Lab Forest Resources Conservat & Utilizat Sou, Kunming 650224, Yunnan, Peoples R China

[2] Kunming Sino Platinum Met Catalyst Co Ltd, Kunming 650106, Yunnan, Peoples R China

[3] Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Henan, Peoples R China

[4] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou 450002, Henan, Peoples R China

[5] Univ Tennessee, Dept Chem & Biomol Engn, ICL, Knoxville, TN 37996 USA

[6] Jiangsu Univ Sci & Technol, Coll Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[7] North Univ China, Coll Mat Sci & Engn, Taiyuan 030051, Shanxi, Peoples R China

来源：

SCIENCE OF ADVANCED MATERIALS | 2019年 / 11卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Mesoporous ZSM-5; CuO/ZSM-5; Auto-Exhaust Catalyst; Preparation; Characterization; Catalytic Activity; RELEASE PROPERTIES; OXYGEN STORAGE; REDUCTION; FE; FABRICATION; COMPOSITES; OXIDE; CHALLENGES; EVOLUTION; BEHAVIOR;

D O I：

10.1166/sam.2019.3559

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mesoporous zeolite ZSM-5 was prepared from microporous zeolite ZSM-5 treated with alkaline solution. Then CuO/ZSM-5 catalysts were successfully fabricated by an equal volume impregnation method. The texture structure, crystal phase, and acidity were characterized by N-2 physisorption-desorption, X-ray diffraction (XRD), F- scanning electron micrographs (SEM), and NH3-TPD techniques. The results showed that the mesoporous surface area and pore volume of ZSM-5 treated with alkali increased significantly from 77 m( )(2)g(-1) and 0.086 cm(3) g(-1) to 192 m(2) g(-1) and 0.326 cm(3) g(-1), respectively. The mesoporous surface area and mesoporous pore volume of ZSM-5 loaded with CuO decreased slightly. XRD patterns showed that the crystallinity of the zeolite decreased gradually with the increase of alkali concentration. The XRD patterns of the CuO/ZSM-5 samples indicated high CuO dispersion in the zeolites treated by alkali. All zeolites have the MFI framework topology. The catalytic activity of CuO/ZSM-5 series for simulating automobile exhaust shows that the optimum catalyst is CuO/ZSM-5(0.5). To purify auto-exhaust, the CuO/ZSM-5 exhibited improved catalytic activities than that of ZSM-5 and the conversion rate of NO, CO, and C3H6 was 100%, 85.87%, and 100%, respectively.

引用

页码：1198 / 1205

页数：8