Carbon dioxide Effect on Pyrolysis and Synergy Effect with Pt Catalyst for Food Waste
열처리에 대한 이산화탄소 효과 및 음식물 쓰레기에 대한Pt 촉매와의 시너지 효과
- 주제(키워드) Catalytic pyrolysis , CO2-assisted pyrolysis , Food waste disposal , Pollutant reduction
- 발행기관 아주대학교
- 지도교수 이제찬
- 발행년도 2021
- 학위수여년월 2021. 2
- 학위명 석사
- 학과 및 전공 일반대학원 환경공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000030690
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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.
more목차
Ⅰ Introduction 1
1.1 General background 1
1.2 The problems of food waste 2
1.3 Thermal treatment 3
Ⅱ Previous researches 7
2.1 Pyrolysis in CO2 7
2.2 Energy recovery from organic waste via pyrolysis in CO2 15
Ⅲ Materials and methods 21
3.1 Materials and chemicals 21
3.2 Thermogravimetric analysis 24
3.3 Catalyst characterization 24
3.4 Pyrolysis of food waste 28
3.5 Product analysis 28
Ⅳ Results and discussion 30
4.1 Effect of CO2 on the pyrolysis of food waste 30
4.2 Synergistic effect of CO2 and Pt catalyst on the pyrolysis of food waste 34
Ⅴ. Conclusion 53
Ⅵ Reference 57
