Facile one-step synthesis of mesoporous Ni-Mg-Al catalyst for syngas production using coupled methane reforming process

• Published in: Fuel (Guildford) Vol. 211; pp. 1 - 10
• Main Authors: Wei, Qinhong, Gao, Xinhua, Liu, Guoguo, Yang, Ruiqin, Zhang, Haibo, Yang, Guohui, Yoneyama, Yoshiharu, Tsubaki, Noritatsu
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-01-2018; Elsevier BV
• Subjects: Al2O3; Aluminum; Basicity; Catalysis; Catalysts; Catalytic activity; Chemical synthesis; Chemisorption; Dry reforming of methane; Evaporation; High temperature; Intermetallic compounds; Magnesium; Methane; Nanoparticles; Nickel; Nickel aluminides; Nickel base alloys; Nickel catalyst; Nickel compounds; Oxidation; Partial oxidation of methane; Reforming; Selectivity; Self-assembly; Syngas; Synthesis gas; Synthetic fuels; Thermal analysis; Nickel catalyst; Dry reforming of methane; Partial oxidation of methane; Al2O3; Syngas
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2017.08.093

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•Ni-Mg-Al catalyst was synthesized by evaporation-induced self-assembly method.•A coupled methane reforming reaction of DRM-POM was employed for producing syngas.•Existing O2 and Mg modifier could help to effectively inhibit coke deposition.•Higher CH4 conversion was accomplished in coupled DRM-POM reforming reaction.
Mesoporous Ni-Mg-Al and Ni-Al catalysts were facilely synthesized via evaporation-induced self-assembly (EISA) method and employed for coupled reforming reaction consisting of dry reforming of methane (DRM) and partial oxidation of methane (POM) to produce syngas (H2+CO). The Ni-Mg-Al and Ni-Al catalysts with encapsulated nickel nanoparticles were directly synthesized in one-pot way. For comparison, Ni/Al2O3 as reference catalyst was also prepared by general impregnation method. Characterization by BET, XRD and H2-chemisorption revealed that the Ni-Mg-Al catalyst owned larger surface area and higher Ni dispersion as well as smaller metallic Ni particles size compared to Ni-Al and Ni/Al2O3 catalysts. CO2-TPD demonstrated that the Ni-Mg-Al catalyst presented stronger basicity due to Mg incorporation. H2-TPR confirmed that the reduction of Ni-based species to Ni0 was performed in high temperature due to the formed NiAl2O4 phase. Activity tests indicated that this Ni-Mg-Al catalyst, due to its excellent physicochemical property, exhibited higher CH4 conversion, H2 selectivity, and H2/CO ratio in the coupled DRM-POM reaction. XRD, SEM and TG-DTA analyses of the used catalysts disclosed that the Mg-modified Ni-Mg-Al catalyst for syngas production using coupled DRM-POM reaction exhibited robust resistance to coke deposition. Consequently, by the synergistic cooperation between the coupled DRM-POM reaction and Mg-modified Ni-Mg-Al catalyst, high catalytic activity and stability could be accomplished to produce syngas.