Comparative study on methane oxidation over CeO2, ZrO 2 and CeO2-ZrO2 mixed oxides

Hyun Seog Roh, Ki Won Jun, Seung Chan Baek

Research output: Contribution to journalReview article

7 Citations (Scopus)

Abstract

Methane oxidation was carried out over CeO2, ZrO2 and CeO2-ZrO2 solid solution and it has been found that almost total oxidation is favorable over the CeO2 catalyst but partial oxidation is possible over both ZrO2 and CeO 2-ZrO2 catalysts with a CH4/O2 ratio of 2. The CeO2-ZrO2 catalyst performed partial oxidation of methane with good activity in the initial stage of the reaction, but it deactivated with time on stream. It is speculated that oxygen vacancies in reduced CeO2-ZrO2 solid solution activate CH4 molecules to produce synthesis gas and O2 molecules supplied from the reactant will change the oxidation state of Ce from 3+ to 4+ resulting in the catalyst deactivation.

Original languageEnglish
Pages (from-to)168-173
Number of pages6
JournalJournal of Industrial and Engineering Chemistry
Volume9
Issue number2
Publication statusPublished - 2003 Dec 1

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Methane
Oxides
Oxidation
Catalysts
Solid solutions
Catalyst deactivation
Molecules
Synthesis gas
Oxygen vacancies

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

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title = "Comparative study on methane oxidation over CeO2, ZrO 2 and CeO2-ZrO2 mixed oxides",
abstract = "Methane oxidation was carried out over CeO2, ZrO2 and CeO2-ZrO2 solid solution and it has been found that almost total oxidation is favorable over the CeO2 catalyst but partial oxidation is possible over both ZrO2 and CeO 2-ZrO2 catalysts with a CH4/O2 ratio of 2. The CeO2-ZrO2 catalyst performed partial oxidation of methane with good activity in the initial stage of the reaction, but it deactivated with time on stream. It is speculated that oxygen vacancies in reduced CeO2-ZrO2 solid solution activate CH4 molecules to produce synthesis gas and O2 molecules supplied from the reactant will change the oxidation state of Ce from 3+ to 4+ resulting in the catalyst deactivation.",
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Comparative study on methane oxidation over CeO2, ZrO 2 and CeO2-ZrO2 mixed oxides. / Roh, Hyun Seog; Jun, Ki Won; Baek, Seung Chan.

In: Journal of Industrial and Engineering Chemistry, Vol. 9, No. 2, 01.12.2003, p. 168-173.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Comparative study on methane oxidation over CeO2, ZrO 2 and CeO2-ZrO2 mixed oxides

AU - Roh, Hyun Seog

AU - Jun, Ki Won

AU - Baek, Seung Chan

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N2 - Methane oxidation was carried out over CeO2, ZrO2 and CeO2-ZrO2 solid solution and it has been found that almost total oxidation is favorable over the CeO2 catalyst but partial oxidation is possible over both ZrO2 and CeO 2-ZrO2 catalysts with a CH4/O2 ratio of 2. The CeO2-ZrO2 catalyst performed partial oxidation of methane with good activity in the initial stage of the reaction, but it deactivated with time on stream. It is speculated that oxygen vacancies in reduced CeO2-ZrO2 solid solution activate CH4 molecules to produce synthesis gas and O2 molecules supplied from the reactant will change the oxidation state of Ce from 3+ to 4+ resulting in the catalyst deactivation.

AB - Methane oxidation was carried out over CeO2, ZrO2 and CeO2-ZrO2 solid solution and it has been found that almost total oxidation is favorable over the CeO2 catalyst but partial oxidation is possible over both ZrO2 and CeO 2-ZrO2 catalysts with a CH4/O2 ratio of 2. The CeO2-ZrO2 catalyst performed partial oxidation of methane with good activity in the initial stage of the reaction, but it deactivated with time on stream. It is speculated that oxygen vacancies in reduced CeO2-ZrO2 solid solution activate CH4 molecules to produce synthesis gas and O2 molecules supplied from the reactant will change the oxidation state of Ce from 3+ to 4+ resulting in the catalyst deactivation.

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