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Study on pyrolysis products characteristics of medical waste and fractional condensation of the pyrolysis oil

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  • Fang, Shuqi
  • Jiang, Luyao
  • Li, Pan
  • Bai, Jing
  • Chang, Chun

Abstract

The dried and pulverized medical solid waste was pyrolyzed at 500 °C, and the components and characteristics were analyzed after the solid, liquid and gas products were collected respectively. Experimental results showed that the combustible component in the obtained gas product accounted for 83.22% and the heat value was 10,995.02kcal/Nm3. The liquid product obtained was black viscous tar with a heat value of 8972.82 kcal/kg, GC/MS analysis indicated that hydrocarbons and lipids accounted for about 60% of liquid product, and the carbon chain length of the products is C6–C28. The carbon content of solid product after purification was up to 63.13%, and the heat value was 5454.54 kcal/kg. Furthermore, in order to make the most of the pyrolysis oil, the liquid product was separated and purified by fractional condensation under the condition of decompression. The effect of process parameters such as vacuum degree and condensing temperature was emphasized, and the optimum technological condition was obtained as follows: vacuum degree 0.04 MPa, heating temperature 140 °C and the first stage condensing temperature was 70 °C. Finally, the viscosity measurement of the residual high-viscosity components was intended to provide data support for the solution of tar plugging equipment and piping problems in practical applications.

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  • Fang, Shuqi & Jiang, Luyao & Li, Pan & Bai, Jing & Chang, Chun, 2020. "Study on pyrolysis products characteristics of medical waste and fractional condensation of the pyrolysis oil," Energy, Elsevier, vol. 195(C).
    • Handle: RePEc:eee:energy:v:195:y:2020:i:c:s0360544220300761
    DOI: 10.1016/j.energy.2020.116969
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    References listed on IDEAS

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    Cited by:

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    2. Bai, Jing & Gao, Hang & Xu, Junhao & Li, Lefei & Zheng, Peng & Li, Pan & Song, Jiande & Chang, Chun & Pang, Shusheng, 2022. "Comprehensive study on the pyrolysis product characteristics of tobacco stems based on a novel nitrogen-enriched pyrolysis method," Energy, Elsevier, vol. 242(C).
    3. Min Su & Qiang Wang & Rongrong Li, 2021. "How to Dispose of Medical Waste Caused by COVID-19? A Case Study of China," IJERPH, MDPI, vol. 18(22), pages 1-18, November.
    4. Zhao, Xinyue & Chen, Heng & Zheng, Qiwei & Liu, Jun & Pan, Peiyuan & Xu, Gang & Zhao, Qinxin & Jiang, Xue, 2023. "Thermo-economic analysis of a novel hydrogen production system using medical waste and biogas with zero carbon emission," Energy, Elsevier, vol. 265(C).
    5. Georgios Giakoumakis & Dorothea Politi & Dimitrios Sidiras, 2021. "Medical Waste Treatment Technologies for Energy, Fuels, and Materials Production: A Review," Energies, MDPI, vol. 14(23), pages 1-30, December.
    6. Wang, Yuting & Chen, Heng & Qiao, Shichao & Pan, Peiyuan & Xu, Gang & Dong, Yuehong & Jiang, Xue, 2023. "A novel methanol-electricity cogeneration system based on the integration of water electrolysis and plasma waste gasification," Energy, Elsevier, vol. 267(C).

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