Effect of CoMo metal loading on H2 and CNTs production from biogas by integrative process

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 degrees C under atmospheric pressure. The integrative process combines the direct methanation of CO2 in biogas and the CH4 decomposition to upgrade biogas to CH4 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 H2 (>90v/v%) and high yield of MWCNTs (2.33 gCNT/ gCat-h) with 100%CO2 conversion and 95%CH4 conversion. Meanwhile, 1 wt%CoMo catalyst provided the single-walled CNTs with diameter of 2.5 nm, high surface area of 165 m2/g (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

The effect of CoMo metal loading on MgO for the conversion of biogas was investigated. The results showed that the 30 wt%CoMo catalyst exhibited the best performance in terms of producing high-purity H2 and high yield of MWCNTs.