Biogas is derived from anaerobic digestion of organic waste and contains two major greenhouse gases-CH4 and CO2. Recently, methane/biogas dry reforming is arising as a promising technology to convert CH4 and CO2 in biogas together into syngas, which shows the demand for efficient and cheap catalysts. On the other hand, a large amount of solid waste is produced every year. The abundance of metal oxides in waste makes them proper to play the role of active part, support or promoter in catalysts. Here we provide a critical review of solid waste derived catalysts for methane/biogas dry reforming. Solid waste such as steel slag, ilmenite metallurgical residue, nickel metal hydride battery waste and empty fruit bunch clinker have been used for catalysts preparation. Most of these catalysts showed high catalytic activity (CH4 conversion higher than 80%) and good carbon resistance. This could be attributed to various components in solid waste like CaO and MgO, which can enhance the dispersion of active metal and improve catalytic behavior. Some solid waste derived products, such as SiO2 synthesized from photovoltaic waste, can also play a crucial role as a catalyst support. Biogas dry reforming using solid waste derived catalyst is an environmentally friendly strategy which can reach high value utilization of solid waste, reduce the cost for catalysts synthesis and transform biogas into hydrogen energy simultaneously.

Biogas dry reforming using solid waste derived catalyst: a green pathway from waste to hydrogen energy

256th National Meeting (2018)

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