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HomeKey Engineering MaterialsKey Engineering Materials Vol. 914Microwave Pyrolysis Combined with CO2 and Steam as...

Microwave Pyrolysis Combined with CO₂ and Steam as Potential Approach for Waste Valorization

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Abstract:

Microwave pyrolysis combined with CO₂ and steam environment is investigated for its feasibility as an alternative method for waste disposal. The combined use of CO₂ and steam under microwave radiation created a synergistic effect in enhancing the thermal cracking of waste material during pyrolysis. The motivation of using CO₂ is to replace N₂ as carrier gas during pyrolysis as an effort to reduce the production of potent greenhouse gas. In this study, different types of microwave pyrolysis are performed including conventional, CO₂ and CO₂+steam on waste particleboard. It was found that the utilization of steam and CO₂ affect the final pyrolytic products yield and composition. Incorporating CO₂ and steam in microwave pyrolysis decreased the yield of char by 33% but increased the yield of bio-oil by 108%. Biochar obtained under CO₂ showed well-developed and cleaner pore structure compared to biochar produced under N₂. Our results demonstrate that the utilization of CO₂ and steam in microwave pyrolysis shows great potential to convert wastes into value-added char and bio-oil with desirable properties.

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Engineering and Industrial Technology: Materials Science

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Periodical:

Key Engineering Materials (Volume 914)

Pages:

187-192

DOI:

https://doi.org/10.4028/p-q43662

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Online since:

March 2022

Authors:

Shin Ying Foong*, Rock Keey Liew, Bernard How Kiat Lee, Su Shiung Lam

Keywords:

CO₂, Microwave, Particleboards, Steam, Wastes

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© 2022 Trans Tech Publications Ltd. All Rights Reserved

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