TY - GEN
T1 - Investigation on reverse water-gas shift over La2NiO4 catalyst by cw-cavity enhanced absorption spectroscopy during CH4/CO2 reforming
AU - Liu, B. S.
AU - Li, Ling
AU - Au, Chak Tong
AU - Cheung, A. S.C.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - Reverse water-gas shift (RWDS) reaction over La2NiO4 catalyst was investigated during CH4/CO2 reforming by continuous wave cavity enhanced absorption spectroscopy, a sensitive absorption technique. The results indicated that the RWGS reaction promoted the conversion of CO2 and decreased the partial pressure of hydrogen. By properly adjusting the pressure of reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH4/CO2 reforming. The intermediates, such as CHO and CH3 of CH4/CO2 reforming was observed by means of liquid-N2 for quenching technique and primarily confirmed a reaction step: CH3+ [O] = CHxO. In addition, XPS results verified that nickel over catalyst after CH4/CO2 reforming existed in elemental state. C1s and O1s spectra of catalyst observed before and after reforming indicated the adsorption of CO2 species reduced in working La2NiO4 catalyst, possibly related to the desorption of CO2 under the condition of vacuum.
AB - Reverse water-gas shift (RWDS) reaction over La2NiO4 catalyst was investigated during CH4/CO2 reforming by continuous wave cavity enhanced absorption spectroscopy, a sensitive absorption technique. The results indicated that the RWGS reaction promoted the conversion of CO2 and decreased the partial pressure of hydrogen. By properly adjusting the pressure of reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH4/CO2 reforming. The intermediates, such as CHO and CH3 of CH4/CO2 reforming was observed by means of liquid-N2 for quenching technique and primarily confirmed a reaction step: CH3+ [O] = CHxO. In addition, XPS results verified that nickel over catalyst after CH4/CO2 reforming existed in elemental state. C1s and O1s spectra of catalyst observed before and after reforming indicated the adsorption of CO2 species reduced in working La2NiO4 catalyst, possibly related to the desorption of CO2 under the condition of vacuum.
UR - http://www.scopus.com/inward/record.url?scp=37349082484&partnerID=8YFLogxK
M3 - Conference proceeding
AN - SCOPUS:37349082484
SN - 084127438X
SN - 9780841274389
T3 - ACS National Meeting Book of Abstracts
BT - 233rd ACS National Meeting, Abstracts of Scientific Papers
T2 - 233rd ACS National Meeting
Y2 - 25 March 2007 through 29 March 2007
ER -