Desorption behavior of surface oxygen complexes on carbon in an inert gas and in O2-gasification atmosphere

Qianlin Zhuang; Takashi Kyotani; Akira Tomita

doi:10.1021/ef9500696

Desorption behavior of surface oxygen complexes on carbon in an inert gas and in O₂-gasification atmosphere

Qianlin Zhuang, Takashi Kyotani, Akira Tomita

ENG - Chemical Engineering

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

An attempt was made to compare the desorption behavior of the surface oxygen complexes in an inert atmosphere with that in the O₂-gasification atmosphere. For this purpose, the transient kinetics (TK) with switching ¹⁸O₂ to ¹⁶O₂ was carried out and from this TK experiment the in situ desorption behavior of ¹⁸O₂-containing surface complexes was evaluated during the ¹⁶O₂ gasification. The thermal stability of the ¹⁸O complexes remaining on the carbon was analyzed by temperature-programmed desorption (TPD). In addition, the TK with switching O₂ to He was done and then the desorption behavior of the complexes was observed under He flow. It was found that the desorption behavior of the surface oxygen complexes in He is different from that in O₂. This finding indicates that the stability of the surface oxygen complexes in nongasification conditions does not correspond to the stability under O₂-gasification conditions.

Original language	English
Pages (from-to)	169-172
Number of pages	4
Journal	Energy and Fuels
Volume	10
Issue number	1
DOIs	https://doi.org/10.1021/ef9500696
Publication status	Published - 1996 Jan 1

ASJC Scopus subject areas

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology

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abstract = "An attempt was made to compare the desorption behavior of the surface oxygen complexes in an inert atmosphere with that in the O2-gasification atmosphere. For this purpose, the transient kinetics (TK) with switching 18O2 to 16O2 was carried out and from this TK experiment the in situ desorption behavior of 18O2-containing surface complexes was evaluated during the 16O2 gasification. The thermal stability of the 18O complexes remaining on the carbon was analyzed by temperature-programmed desorption (TPD). In addition, the TK with switching O2 to He was done and then the desorption behavior of the complexes was observed under He flow. It was found that the desorption behavior of the surface oxygen complexes in He is different from that in O2. This finding indicates that the stability of the surface oxygen complexes in nongasification conditions does not correspond to the stability under O2-gasification conditions.",

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T1 - Desorption behavior of surface oxygen complexes on carbon in an inert gas and in O2-gasification atmosphere

AU - Zhuang, Qianlin

AU - Kyotani, Takashi

AU - Tomita, Akira

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N2 - An attempt was made to compare the desorption behavior of the surface oxygen complexes in an inert atmosphere with that in the O2-gasification atmosphere. For this purpose, the transient kinetics (TK) with switching 18O2 to 16O2 was carried out and from this TK experiment the in situ desorption behavior of 18O2-containing surface complexes was evaluated during the 16O2 gasification. The thermal stability of the 18O complexes remaining on the carbon was analyzed by temperature-programmed desorption (TPD). In addition, the TK with switching O2 to He was done and then the desorption behavior of the complexes was observed under He flow. It was found that the desorption behavior of the surface oxygen complexes in He is different from that in O2. This finding indicates that the stability of the surface oxygen complexes in nongasification conditions does not correspond to the stability under O2-gasification conditions.

AB - An attempt was made to compare the desorption behavior of the surface oxygen complexes in an inert atmosphere with that in the O2-gasification atmosphere. For this purpose, the transient kinetics (TK) with switching 18O2 to 16O2 was carried out and from this TK experiment the in situ desorption behavior of 18O2-containing surface complexes was evaluated during the 16O2 gasification. The thermal stability of the 18O complexes remaining on the carbon was analyzed by temperature-programmed desorption (TPD). In addition, the TK with switching O2 to He was done and then the desorption behavior of the complexes was observed under He flow. It was found that the desorption behavior of the surface oxygen complexes in He is different from that in O2. This finding indicates that the stability of the surface oxygen complexes in nongasification conditions does not correspond to the stability under O2-gasification conditions.

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Desorption behavior of surface oxygen complexes on carbon in an inert gas and in O₂-gasification atmosphere

Abstract

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