DOI: 10.1002/cctc.201400018. Methane Coupling Reaction in an Oxy‐Steam Stream through an OH Radical Pathway by using Supported Alkali Metal Catalysts

Methane Coupling Reaction in an Oxy‐Steam Stream through an OH Radical Pathway by using Supported Alkali Metal Catalysts

10.1002/cctc.201400018

Crossref journal-article

Wiley

ChemCatChem (311)

Abstract

AbstractA universal reaction mechanism involved in the oxidative coupling of methane (OCM) is demonstrated under oxy‐steam conditions using alkali‐metal‐based catalysts. Rigorous kinetic measurements indicated a reaction mechanism that is consistent with OH radical formation from a H2O–O2 reaction followed by CH activation in CH4 with an OH radical. Thus, the presence of water enhances both the CH4 conversion rate and the C2 selectivity. This OH radical pathway that is selective for the OCM was observed for the catalyst without Mn, which suggests clearly that Mn is not the essential component in a selective OCM catalyst. The experiments with different catalyst compositions revealed that the OH.‐mediated pathway proceeded in the presence of catalysts with different alkali metals (Na, K) and different oxo anions (W, Mo). This difference in catalytic activity for OH radical generation accounts for the different OCM selectivities. As a result, a high C2 yield is achievable by using Na2WO4/SiO2, which catalyzes the OH.‐mediated pathway selectively.

Bibliography

Liang, Y., Li, Z., Nourdine, M., Shahid, S., & Takanabe, K. (2014). Methane Coupling Reaction in an OxyâSteam Stream through an OH Radical Pathway by using Supported Alkali Metal Catalysts. ChemCatChem, 6(5), 1245â1251. Portico.

Authors 5

Yin Liang (first)
Zhikao Li (additional)
Mohamed Nourdine (additional)
Salman Shahid (additional)
Kazuhiro Takanabe (additional)

References 47 Referenced 50

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Dates

Type	When
Created	11 years, 5 months ago (March 24, 2014, 10:22 p.m.)
Deposited	1 year, 10 months ago (Oct. 17, 2023, 12:39 a.m.)
Indexed	1 month, 4 weeks ago (July 8, 2025, 1:22 a.m.)
Issued	11 years, 5 months ago (March 24, 2014)
Published	11 years, 5 months ago (March 24, 2014)
Published Online	11 years, 5 months ago (March 24, 2014)
Published Print	11 years, 4 months ago (May 1, 2014)

Funders 0

None

BibTeX

@article{Liang_2014, title={Methane Coupling Reaction in an Oxy‐Steam Stream through an OH Radical Pathway by using Supported Alkali Metal Catalysts}, volume={6}, ISSN={1867-3899}, url={http://dx.doi.org/10.1002/cctc.201400018}, DOI={10.1002/cctc.201400018}, number={5}, journal={ChemCatChem}, publisher={Wiley}, author={Liang, Yin and Li, Zhikao and Nourdine, Mohamed and Shahid, Salman and Takanabe, Kazuhiro}, year={2014}, month=mar, pages={1245–1251} }

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