Pyrolysis of waste feedstocks in CO2 for effective energy recovery and waste treatment

By E. Kwon, Soosan Kim, Jechan Lee. Journal of CO2 Utilization, 2019

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Abstract Pyrolysis is a thermochemical conversion method for the production of energy and chemicals from carbonaceous substances. In this review, we emphasize the recent progress in the pyrolysis of waste feedstocks in the presence of carbon dioxide (CO2). CO2-assisted pyrolysis is compared to typical pyrolysis (i.e., pyrolysis under inert environment, such as nitrogen). It has been shown that CO2 plays a crucial role in increasing the yield of combustible permanent gas (e.g., carbon monoxide) while decreasing tar yield. CO2-assisted pyrolysis is also an attractive technique to treat waste (municipal solid waste, plastic waste, etc.) because CO2 enhances the thermal cracking of volatile species, thereby suppressing the formation of harmful chemical compounds, such as benzene derivatives and polycyclic aromatic hydrocarbons. In addition to highlighting the recent achievements in the CO2-assisted pyrolysis processes, we discuss the points that should be considered for future research.

Subfields: Biomedical Engineering, Safety, Risk, Reliability and Quality

View Paper: https://www.semanticscholar.org/paper/a5a08d5b87a8e3c56183ff890d90ef053df44542