Recent progress on CO-rich syngas production via CO2 gasification of various wastes: A critical review on efficiency, challenges and outlook
2021
Chan, Yi Herng | Syed Abdul Rahman, Syarifah Nor Faizah | Lahuri, Hazratul Mumtaz | Khalid, Alia
Carbon monoxide (CO) is a highly valuable component of syngas which could be used to synthesize various chemicals and fuels. Conventionally, syngas is derived from fossil-based natural gas and coal which are non-renewable. To curb the problem, CO₂ gasification offers a win-win solution in which CO₂ is converted with wastes to CO, achieving carbon emission mitigation and addressing waste disposal issue simultaneously. In this review, gasification of various wastes by CO₂ with particular focus given to generation of CO-rich syngas is presented and critically discussed. This includes the effects of operating parameters (temperature, pressure and physicochemical properties of feedstocks) and advanced CO₂ gasification techniques (catalytic CO₂ gasification, CO₂ co-gasification and microwave-driven CO₂ gasification). Furthermore, associated technological challenges are highlighted and way forward in this field are proposed.
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