Investigation on reverse water-gas shift over La2NiO4 catalyst by cw-cavity enhanced absorption spectroscopy during CH 4/CO2 reforming

B. S. Liu; Ling Li; Chak Tong AU; A. S.C. Cheung

doi:10.1007/s10562-006-0031-0

Investigation on reverse water-gas shift over La₂NiO₄ catalyst by cw-cavity enhanced absorption spectroscopy during CH ₄/CO₂ reforming

B. S. Liu, Ling Li, Chak Tong AU, A. S.C. Cheung^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

20 Citations (Scopus)

Abstract

Reverse water-gas shift (RWGS) 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 proper adjustment of the pressure of the reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH ₄/CO₂ reforming. The intermediates of CH ₄/CO₂ reforming such as CHO, OH and CH₃ were observed by means of the liquid-N₂ quenching technique, and a reaction step: CH _x + [O] = CH _x O was primarily confirmed. In addition, XPS and XRD results verified that nickel over catalyst after CH₄/CO₂ reforming existed in elemental state. The HRTEM images of used catalyst indicated that the deactivation of catalyst was originated mainly from the formation of nanotubes and graphite carbon on active sites of nickel.

Original language	English
Pages (from-to)	37-44
Number of pages	8
Journal	Catalysis Letters
Volume	108
Issue number	1-2
DOIs	https://doi.org/10.1007/s10562-006-0031-0
Publication status	Published - Apr 2006

Scopus Subject Areas

Catalysis
Chemistry(all)

User-Defined Keywords

CEA spectra
CH/CO reforming
Intermediates
LaNiO catalyst
Reverse water-gas shift

Access to Document

10.1007/s10562-006-0031-0

Cite this

@article{6d70b7a3f9bf4679ab5858e08cb83a6f,

title = "Investigation on reverse water-gas shift over La2NiO4 catalyst by cw-cavity enhanced absorption spectroscopy during CH 4/CO2 reforming",

abstract = "Reverse water-gas shift (RWGS) 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 proper adjustment of the pressure of the reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH 4/CO2 reforming. The intermediates of CH 4/CO2 reforming such as CHO, OH and CH3 were observed by means of the liquid-N2 quenching technique, and a reaction step: CH x + [O] = CH x O was primarily confirmed. In addition, XPS and XRD results verified that nickel over catalyst after CH4/CO2 reforming existed in elemental state. The HRTEM images of used catalyst indicated that the deactivation of catalyst was originated mainly from the formation of nanotubes and graphite carbon on active sites of nickel.",

keywords = "CEA spectra, CH/CO reforming, Intermediates, LaNiO catalyst, Reverse water-gas shift",

author = "Liu, {B. S.} and Ling Li and AU, {Chak Tong} and Cheung, {A. S.C.}",

note = "Funding Information: The work described here was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7101/02P).",

year = "2006",

month = apr,

doi = "10.1007/s10562-006-0031-0",

language = "English",

volume = "108",

pages = "37--44",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Springer Netherlands",

number = "1-2",

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TY - JOUR

T1 - Investigation on reverse water-gas shift over La2NiO4 catalyst by cw-cavity enhanced absorption spectroscopy during CH 4/CO2 reforming

AU - Liu, B. S.

AU - Li, Ling

AU - AU, Chak Tong

AU - Cheung, A. S.C.

N1 - Funding Information: The work described here was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7101/02P).

PY - 2006/4

Y1 - 2006/4

N2 - Reverse water-gas shift (RWGS) 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 proper adjustment of the pressure of the reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH 4/CO2 reforming. The intermediates of CH 4/CO2 reforming such as CHO, OH and CH3 were observed by means of the liquid-N2 quenching technique, and a reaction step: CH x + [O] = CH x O was primarily confirmed. In addition, XPS and XRD results verified that nickel over catalyst after CH4/CO2 reforming existed in elemental state. The HRTEM images of used catalyst indicated that the deactivation of catalyst was originated mainly from the formation of nanotubes and graphite carbon on active sites of nickel.

AB - Reverse water-gas shift (RWGS) 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 proper adjustment of the pressure of the reaction system, it is possible to suppress the occurrence of RWGS reaction and increase the selectivity of CH 4/CO2 reforming. The intermediates of CH 4/CO2 reforming such as CHO, OH and CH3 were observed by means of the liquid-N2 quenching technique, and a reaction step: CH x + [O] = CH x O was primarily confirmed. In addition, XPS and XRD results verified that nickel over catalyst after CH4/CO2 reforming existed in elemental state. The HRTEM images of used catalyst indicated that the deactivation of catalyst was originated mainly from the formation of nanotubes and graphite carbon on active sites of nickel.

KW - CEA spectra

KW - CH/CO reforming

KW - Intermediates

KW - LaNiO catalyst

KW - Reverse water-gas shift

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DO - 10.1007/s10562-006-0031-0

M3 - Journal article

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SP - 37

EP - 44

JO - Catalysis Letters

JF - Catalysis Letters

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