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Author: search.filters.author.Reubroycharoen, PrasertSubject: search.filters.subject.Biogas

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    Item type:Publication,
    Effect of CoMo metal loading on H2 and CNTs production from biogas by integrative process
    (2022-12-19)
    Aieamsam-Aung, Pichawee
    ;
    Nantapong, Paveenuch
    ;
    Rattanaamonkulchai, Raminda
    ;
    Kludpantanapan, Thunyathon
    ;
    Srifa, Atthapon
    Effect of CoMo metal loading to MgO (1, 5, 30 and 50 wt%) on conversion of biogas by an integrative process was investigated at 900 °C under atmospheric pressure. The integrative process combines the direct methanation of CO<inf>2</inf> in biogas and the CH<inf>4</inf> decomposition to upgrade biogas to CH<inf>4</inf> and decompose to hydrogen and carbon nanotubes. Methane dissociative reaction is governed by the concentration of active metals on the catalyst surface, while DRM reaction is suppressed. The 30 wt%CoMo catalyst shows the optimal loading for production of high-purity H<inf>2</inf> (>90v/v%) and high yield of MWCNTs (2.33 gCNT/gCat-h) with 100%CO<inf>2</inf> conversion and 95%CH<inf>4</inf> conversion. Meanwhile, 1 wt%CoMo catalyst provided the single-walled CNTs with diameter of 2.5 nm, high surface area of 165 m<sup>2</sup>/g and high graphitization of I<inf>G</inf>/I<inf>D</inf> = 6.14.