Understanding the Impact of Hydrogen Activation by SrCe 0.8Zr0.2O 3−δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversion

dc.contributor.authorCheng, Sichao
dc.contributor.authorOh, Su Cheun
dc.contributor.authorSakbodin, Mann
dc.contributor.authorQiu, Limei
dc.contributor.authorDiao, Yuxia
dc.contributor.authorLiu, Dongxia
dc.date.accessioned2022-06-14T14:48:22Z
dc.date.available2022-06-14T14:48:22Z
dc.date.issued2022-01-10
dc.descriptionPartial funding for Open Access provided by the UMD Libraries' Open Access Publishing Fund.en_US
dc.description.abstractUnderstanding the Impact of Hydrogen Activation by SrCe 0.8Zr0.2O 3−δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversion Sichao Cheng 1†, Su Cheun Oh 1†, Mann Sakbodin 1 , Limei Qiu 2 , Yuxia Diao 2 and Dongxia Liu 1 * 1 Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, United States, 2 Research Institute of Petroleum Processing, SINOPEC, Beijing, China Direct non-oxidative methane conversion (DNMC) converts methane (CH 4 ) in one step to olefin and aromatic hydrocarbons and hydrogen (H 2) co-product. Membrane reactors comprising methane activation catalysts and H 2 -permeable membranes can enhance methane conversion by in situ H 2 removal via Le Chatelier’s principle. Rigorous description of H 2 kinetic effects on both membrane and catalyst materials in the membrane reactor, however, has been rarely studied. In this work, we report the impact of hydrogen activation by hydrogen-permeable SrCe 0.8Zr 0.2O 3−δ (SCZO) perovskite oxide material on DNMC over an iron/silica catalyst. The SCZO oxide has mixed ionic and electronic conductivity and is capable of H2 activation into protons and electrons for H 2 permeation. In the fixed- bed reactor packed with a mixture of SCZO oxide and iron/silica catalyst, stable and high methane conversion and low coke selectivity in DNMC was achieved by co-feeding of H 2 in methane stream. The characterizations show that SCZO activates H 2 to favor “soft coke” formation on the catalyst. The SCZO could absorb H 2 in situ to lower its local concentration to mitigate the reverse reaction of DNMC in the tested conditions. The co-existence of H 2 co-feed, SCZO oxide, and DNMC catalyst in the present study mimics the conditions of DNMC in the H2 -permeable SCZO membrane reactor. The findings in this work offer the mechanistic understanding of and guidance for the design of H2 -permeable membrane reactors for DNMC and other alkane dehydrogenation reactions.en_US
dc.description.urihttps://doi.org/10.3389/fchem.2021.806464
dc.identifierhttps://doi.org/10.13016/m2sj-ocom
dc.identifier.citationCheng S, Oh SC, Sakbodin M, Qiu L, Diao Y and Liu D (2022) Understanding the Impact of Hydrogen Activation by SrCe 0.8Zr 0.2 O 3−δ Perovskite Membrane Material on Direct Non- Oxidative Methane Conversion. Front. Chem. 9:806464.en_US
dc.identifier.urihttp://hdl.handle.net/1903/28672
dc.language.isoen_USen_US
dc.publisherFrontiersen_US
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtChemical & Biomolecular Engineeringen_us
dc.titleUnderstanding the Impact of Hydrogen Activation by SrCe 0.8Zr0.2O 3−δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversionen_US
dc.typeArticleen_US

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