Ce-based catalysts for simultaneous removal of both diesel soot and NOx

Shu Jie Wang, Gu Chu Zou, Yao Xu, Ming Xia Chen, Wen Feng Shangguan, Hisahiro Einaga, Yasutake Teraoka

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Ce-based oxides were prepared by citric acid complex method and characterized by nitrogen physisorption, XRD, BET, H2-TPR and XPS; their catalytic performances in simultaneous removal of diesel soot and NOx were investigated on a thermogravimetric apparatus and a tubular reactor. Co0.1/CeLa0.05 prevailed over all the detected materials in catalytic performance for simultaneous removal of soot and NOx. T50 of this catalyst (temperature for 50% soot combustion)was 301℃, and the yield of N2 was 41.4%. A majority of cobalt oxides were dispersed on the surface of Ce-La solid solution. The mutual transformation between Co3+ and Co2+enhanced the redox ability and oxygen storage capacity of pure ceria oxide, achieving lower temperature of combustion. Cerium-cobalt complex oxide doped with lanthanum presented a tremendous increase of surface area, leading to higher yield of N2. The formation of trace amount of LaCoO3 promoted oxygen vacancies creation, thus affecting positively to the soot combustion activity.

Original languageEnglish
Pages (from-to)60-67
Number of pages8
JournalJournal of Molecular Catalysis
Volume29
Issue number1
Publication statusPublished - Feb 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis

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