Carbon dioxide Effect on Pyrolysis and Synergy Effect with Pt Catalyst for Food Waste

Alternative Title
열처리에 대한 이산화탄소 효과 및 음식물 쓰레기에 대한Pt 촉매와의 시너지 효과
Author(s)
김수산
Advisor
이제찬
Department
일반대학원 환경공학과
Publisher
The Graduate School, Ajou University
Publication Year
2021-02
Language
eng
Keyword
CO2-assisted pyrolysisCatalytic pyrolysisFood waste disposalPollutant reduction
Alternative Abstract
In this study, we emphasize the recent progress in the pyrolysis of waste feedstock 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 (Organic waste and bio-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. Also, in this study, carbon dioxide (CO2) were employed to thermally dispose real food waste in the presence of a catalyst. The catalyst and CO2 enhanced the generation of non-condensable gases and hindered the generation of condensable compounds, while they had no effect on the amount of solid residue after the thermal treatment of food waste. In addition, condensable cyclic compounds were reduced when the catalyst and/or CO2 were used for the thermal disposal process. The enhancement of non-condensable gas production and the reduction of cyclic compound formation were maximized when both the Pt catalyst and CO2 applied to the thermal disposal of food waste at the same time. For example, approximately 67.3% less cyclic compounds including benzene derivatives were generated from the thermal treatment of food waste at 700 °C with the catalyst under CO2 atmosphere than from the non-catalytic thermal treatment of food waste under no CO2 condition. This study would suggest that a CO2-assisted catalytic thermal process is a more environmentally benign disposal method for food waste.
URI
https://dspace.ajou.ac.kr/handle/2018.oak/20005
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Graduate School of Ajou University > Department of Environmental Engineering > 3. Theses(Master)
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