Surface complexes during Ca-catalyzed O2-gasification of carbon

R. R. Martin; J. A. MacPhee; T. Kyotani; S. Hayashi; A. Tomita

Surface complexes during Ca-catalyzed O₂-gasification of carbon

R. R. Martin, J. A. MacPhee, T. Kyotani, S. Hayashi, A. Tomita

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

Abstract

The authors gasified Ca-loaded carbon sample with labeled O₂. From the gas analysis during O₂-gasification and the subsequent temperature programmed desorption (TPD), the difference between the Ca-catalyzed and the uncatalyzed gasification was investigated, and it was attempted to clarify how Ca enhances O₂-gasification. Furthermore, by analyzing the surface of Ca-loaded carbon with secondary ion mass spectrometer (SIMS), they directly examined the surface oxygen complexes after gasification. From the experiments using gas mixtures, it can be safely said that (1) the remarkable formation of C¹⁸O₂ can not be attributed to the gas phase reaction between C¹⁸O and ¹⁸O₂, but to the primary reaction of carbon and ¹⁸O₂, (2) the rates of O₂-related exchange reactions are negligibly slow in comparison with the rate of carbon gasification, and (3) the rate of isotope exchange reaction between CO₂ and CO is not so large as that of carbon gasification.

Original language	English
Pages (from-to)	490-491
Number of pages	2
Journal	Extended Abstracts and Program - Biennial Conference on Carbon
Publication status	Published - 1991 Jan 1
Externally published	Yes
Event	20th Biennial Conference on Carbon - Santa Barbara, CA, USA Duration: 1991 Jun 23 → 1991 Jun 28

ASJC Scopus subject areas

Engineering(all)

Cite this

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title = "Surface complexes during Ca-catalyzed O2-gasification of carbon",

abstract = "The authors gasified Ca-loaded carbon sample with labeled O2. From the gas analysis during O2-gasification and the subsequent temperature programmed desorption (TPD), the difference between the Ca-catalyzed and the uncatalyzed gasification was investigated, and it was attempted to clarify how Ca enhances O2-gasification. Furthermore, by analyzing the surface of Ca-loaded carbon with secondary ion mass spectrometer (SIMS), they directly examined the surface oxygen complexes after gasification. From the experiments using gas mixtures, it can be safely said that (1) the remarkable formation of C18O2 can not be attributed to the gas phase reaction between C18O and 18O2, but to the primary reaction of carbon and 18O2, (2) the rates of O2-related exchange reactions are negligibly slow in comparison with the rate of carbon gasification, and (3) the rate of isotope exchange reaction between CO2 and CO is not so large as that of carbon gasification.",

author = "Martin, {R. R.} and MacPhee, {J. A.} and T. Kyotani and S. Hayashi and A. Tomita",

year = "1991",

month = jan,

day = "1",

language = "English",

pages = "490--491",

journal = "Extended Abstracts and Program - Biennial Conference on Carbon",

issn = "0160-7464",

note = "20th Biennial Conference on Carbon ; Conference date: 23-06-1991 Through 28-06-1991",

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TY - JOUR

T1 - Surface complexes during Ca-catalyzed O2-gasification of carbon

AU - Martin, R. R.

AU - MacPhee, J. A.

AU - Kyotani, T.

AU - Hayashi, S.

AU - Tomita, A.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - The authors gasified Ca-loaded carbon sample with labeled O2. From the gas analysis during O2-gasification and the subsequent temperature programmed desorption (TPD), the difference between the Ca-catalyzed and the uncatalyzed gasification was investigated, and it was attempted to clarify how Ca enhances O2-gasification. Furthermore, by analyzing the surface of Ca-loaded carbon with secondary ion mass spectrometer (SIMS), they directly examined the surface oxygen complexes after gasification. From the experiments using gas mixtures, it can be safely said that (1) the remarkable formation of C18O2 can not be attributed to the gas phase reaction between C18O and 18O2, but to the primary reaction of carbon and 18O2, (2) the rates of O2-related exchange reactions are negligibly slow in comparison with the rate of carbon gasification, and (3) the rate of isotope exchange reaction between CO2 and CO is not so large as that of carbon gasification.

AB - The authors gasified Ca-loaded carbon sample with labeled O2. From the gas analysis during O2-gasification and the subsequent temperature programmed desorption (TPD), the difference between the Ca-catalyzed and the uncatalyzed gasification was investigated, and it was attempted to clarify how Ca enhances O2-gasification. Furthermore, by analyzing the surface of Ca-loaded carbon with secondary ion mass spectrometer (SIMS), they directly examined the surface oxygen complexes after gasification. From the experiments using gas mixtures, it can be safely said that (1) the remarkable formation of C18O2 can not be attributed to the gas phase reaction between C18O and 18O2, but to the primary reaction of carbon and 18O2, (2) the rates of O2-related exchange reactions are negligibly slow in comparison with the rate of carbon gasification, and (3) the rate of isotope exchange reaction between CO2 and CO is not so large as that of carbon gasification.

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M3 - Conference article

AN - SCOPUS:0025857998

SP - 490

EP - 491

JO - Extended Abstracts and Program - Biennial Conference on Carbon

JF - Extended Abstracts and Program - Biennial Conference on Carbon

SN - 0160-7464

T2 - 20th Biennial Conference on Carbon

Y2 - 23 June 1991 through 28 June 1991

ER -

Surface complexes during Ca-catalyzed O₂-gasification of carbon

Abstract

ASJC Scopus subject areas

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