Low-temperature selective catalytic reduction of NOx with NH3 over a manganese and cerium oxide/graphene composite prepared by a hydrothermal method. Issue 5 (15th October 2015)

• Record Type: Journal Article
• Authors: Xiao, Xiang; Sheng, Zhongyi; Yang, Liu; Dong, Fan
• Is Part Of: Catalysis science & technology. Volume 6:Issue 5(2016)
• Page Start: 1507
• Page End: 1514
• Publication Date: 2015-10-15
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c5cy01228g
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : MnO x –CeO2 /graphene catalysts prepared by a hydrothermal method exhibited excellent NH3 -SCR activity and strong resistance against SO2, which is very competitive for practical application in controlling NO x emission from flue gas. Abstract : MnO x –CeO2 /graphene (MnO x –CeO2 /GR) catalysts prepared by a hydrothermal method with different mass ratios of graphene (0–0.45 wt%) were investigated for the low-temperature selective catalytic reduction (SCR) of NO x with NH3 . The as-prepared catalysts have been characterized systematically to elucidate their morphological structure and surface properties by XRD, SEM, TEM, BET, XPS, H2 -TPR, NH3 -TPD and FT-TR. It was found that the environmentally benign MnO x –CeO2 /GR (0.3 wt%) catalyst exhibited excellent NH3 -SCR activity and strong resistance against H2 O and SO2, which is very competitive for application in controlling NO x emission from flue gas. On the basis of the catalyst characterization, the high specific surface areas, the uniform distribution of active sites, and the interaction of manganese and cerium oxide species played key roles in the excellent catalytic performance of MnO x –CeO2 /GR and resulted in improved SO2 tolerance.