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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2611
Title: Spin conversion of hydrogen over LaFeO3/Al2O3 catalysts at low temperature: Synthesis, characterization and activity
Authors: Das T.
Kweon S.-C.
Choi J.-G.
Kim S.Y.
Oh I.-H.
Published in: International Journal of Hydrogen Energy
Abstract: A series of LaFeO3 perovskite catalysts over alumina support (LaFeO3/Al2O3) were prepared by citrate sol-gel method by changing the loading of LaFeO3 on alumina. The morphology and structure of perovskite catalysts were characterized by SEM, XRD, Raman spectroscopy, and the spin conversion of ortho hydrogen to para hydrogen was investigated by in situ FTIR spectroscopy at 17 K temperature. The spin conversion was primarily affected by the dispersion of perovskite phase over the support, the weight percent of LaFeO3 loading on alumina, and the ratio of lanthanum to iron in LaFeO3. The perovskite phase was formed at 1173 K, and less sintered and more dispersed at lower calcination temperatures. Thus, the highest spin conversion was observed for the perovskite catalyst calcined at 773 K with 20LaFeO3/Al2O3 and the 2:8 ratio of La to Fe (20La0.2Fe0.8O3/Al2O3), where 99.8% of ortho hydrogen at 17 K was converted into para hydrogen in 120 min interaction with the perovskite catalyst. © 2014 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Citation: International Journal of Hydrogen Energy (2015), 40(1): 383-391
URI: https://doi.org/10.1016/j.ijhydene.2014.10.137
http://repository.iitr.ac.in/handle/123456789/2611
Issue Date: 2015
Publisher: Elsevier Ltd
Keywords: In situ FTIR spectroscopy
LaFeO3/Al2O3
Ortho hydrogen
Para hydrogen
Perovskite catalysts
Spin conversion
ISSN: 3603199
Author Scopus IDs: 7201461586
55260853800
7501391592
55667496900
7101831086
Author Affiliations: Das, T., Green City Technology Institute, Korea Institute of Science and Technology, Seoul, 136-791, South Korea
Kweon, S.-C., Green City Technology Institute, Korea Institute of Science and Technology, Seoul, 136-791, South Korea
Choi, J.-G., Department of Chemical Engineering, Hannam University, Daejon, 300-791, South Korea
Kim, S.Y., Green City Technology Institute, Korea Institute of Science and Technology, Seoul, 136-791, South Korea
Oh, I.-H., Green City Technology Institute, Korea Institute of Science and Technology, Seoul, 136-791, South Korea
Funding Details: This research work was supported by the Convergence Research Center Program funded by the Ministry of Future Creation and Science ( 2013K000402 ), South Korea. In particular, Prof. Choi appreciates Hannam University for 2014 Hannam University Kyobi starting from April 1, 2014 through March 31, 2015.
Corresponding Author: Choi, J.-G.; Department of Chemical Engineering, Hannam UniversitySouth Korea
Appears in Collections:Journal Publications [CH]

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