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Facile synthesis of highly active Rh/Al2O3 steam reforming catalysts with preformed support by flame spray pyrolysis
Yu, Jiafeng1; Zhang, Zhe1; Dallmann, Felix2; Zhang, Jixin1; Miao, Dengyun1; Xu, Hengyong1; Goldbach, Andreas1; Dittmeyer, Roland2
KeywordRh/al2o3 Flame Spray Pyrolysis Preformed Support Methane Steam Reforming Turnover Frequency
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
2016-12-05
ISSN0926-3373
DOI10.1016/j.apcatb.2016.05.050
Volume198Pages:171-179
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordHYDROGEN-PRODUCTION ; CHEMICAL CONVERSION ; THERMAL-STABILITY ; ENANTIOSELECTIVE HYDROGENATION ; STRUCTURAL-PROPERTIES ; MICROCHANNEL REACTOR ; METHANE ACTIVATION ; KINETIC ASSESSMENT ; SITE REQUIREMENTS ; REACTION PATHWAYS
AbstractA highly active catalyst is a necessity for a compact microchannel membrane reactor for methane steam reforming (MSR) due to the limitation of catalyst loading per membrane area and the deliberately reduced working temperature compared to a conventional reformer. Two series of Rh/Al2O3 catalysts with nominal Rh loadings in the range of 0.2-5 wt.% were prepared by flame spray pyrolysis (FSP) using flame made and preformed support particles. For the flame made support, Rh and Al precursors were premixed and sprayed simultaneously. In the other case, the Rh precursor was mixed with a preformed boehmite particle suspension and then sprayed into the flame. Their catalytic activity was investigated for MSR in a fix-bed reactor. The nominal 1 wt.% Rh catalyst supported on preformed Al2O3 exhibited the highest CH4 conversion of all catalysts at W/F=0.374 g(cat) h/mol(CH4) and 600 degrees C. The turnover frequency (TOF) over both types of catalysts was much higher than the values of reported Rh reforming catalysts in that temperature range. In addition, the TOF values of catalysts based on preformed Al2O3 particles exceeded those over the ones with in situ formed Al2O3 by 29-39%. It is proposed that the preformed Al2O3 support promotes the catalytic activity, possibly enhancing H-2 spillover which is considered to facilitate the rate determining steps in MSR. The successful synthesis of catalysts supported by preformed materials opens new possibilities for preparation of nano-structured catalysts from a multitude of support materials via flame spray pyrolysis. (C) 2016 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000381950000019
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/170107
Collection中国科学院大连化学物理研究所
Corresponding AuthorGoldbach, Andreas; Dittmeyer, Roland
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
2.Karlsruhe Inst Technol, Inst Micro Proc Engn, Karlsruhe, Germany
Recommended Citation
GB/T 7714
Yu, Jiafeng,Zhang, Zhe,Dallmann, Felix,et al. Facile synthesis of highly active Rh/Al2O3 steam reforming catalysts with preformed support by flame spray pyrolysis[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,198:171-179.
APA Yu, Jiafeng.,Zhang, Zhe.,Dallmann, Felix.,Zhang, Jixin.,Miao, Dengyun.,...&Dittmeyer, Roland.(2016).Facile synthesis of highly active Rh/Al2O3 steam reforming catalysts with preformed support by flame spray pyrolysis.APPLIED CATALYSIS B-ENVIRONMENTAL,198,171-179.
MLA Yu, Jiafeng,et al."Facile synthesis of highly active Rh/Al2O3 steam reforming catalysts with preformed support by flame spray pyrolysis".APPLIED CATALYSIS B-ENVIRONMENTAL 198(2016):171-179.
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