Investigation of gauze and medical bottle co-pyrolysis on the product formation, reactivity, and reaction pathway of char, liquid oil, and gas

Effective in-site treatment of medical waste has become a weak link in hospitals. Pyrolysis technology is a treatment method for medical waste that can enable rapid disposal in hospital settings and relieve environmental pressure, while also producing high-value products and reducing disposal costs....

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Bibliographic Details
Published in:Biomass conversion and biorefinery 2023-03, Vol.14 (22), p.29145-29158
Main Authors: Li, Li, Chen, Zhaoguang, Huang, Yingzhen, Guo, Zhenhao, Dong, Hang, Xie, Yu, Zhou, Nan, Zhou, Zhi
Format: Article
Language:English
Subjects:
Aliphatic hydrocarbons
Biotechnology
Energy
Gauze
Health services
Hospitals
Medical wastes
Original
Original Article
Pyrolysis
Renewable and Green Energy
Resource utilization
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Summary:Effective in-site treatment of medical waste has become a weak link in hospitals. Pyrolysis technology is a treatment method for medical waste that can enable rapid disposal in hospital settings and relieve environmental pressure, while also producing high-value products and reducing disposal costs. In this work, the effects of feedstock ratio and temperature on product yield and components of gauze (GA) and medical bottles (MB) co-pyrolysis have been investigated. The higher yield of solid products was obtained by co-pyrolysis of GA and MB at 400 ℃. With the addition of MB and an increase in temperature for the co-pyrolysis of GA and MB in a similar ratio, the pyrolysis oil and gas yields gradually increased. According to GC–MS analysis, co-feeding 75% MB to GA improved the alcohol content from 33.21% to a maximum yield of 59.8% at a pyrolysis temperature of 700 ℃. The content of aliphatic hydrocarbon reached 38.68% when the pyrolysis temperature and MB addition ratio were 700 °C and 75%, respectively. The GC data shows that the main gas components of co-pyrolysis of GA/MB were CH 4 and H 2 , while the pyrolysis of pure GA or MB resulted in CO or CO 2 . Additionally, the solid carbon products obtained have an excellent pore structure. This strategy can benefit medical waste control and resource utilization for the low-cost disposal of medical waste and the acquisition of high-value resource products. Graphical Abstract
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-023-04006-1