Review on sustainable production of biochar through hydrothermal liquefaction: Physico-chemical properties and applications
2020
Ponnusamy, Vinoth Kumar | Nagappan, Senthil | Bhosale, Rahul R | Lay, Chyi-How | Duc Nguyen, Dinh | Pugazhendhi, Arivalagan | Chang, Soon Woong | Kumar, Gopalakrishnan
This review examines in detail the production and characteristics of biochar resulting from hydrothermal liquefaction. Specifically, the impact of feedstocks and different process parameters on the properties and yield of biochar by hydrothermal liquefaction has been thoroughly studied. Hydrothermal liquefaction derived biochars, relative to biochars from high-temperature thermochemical processes retain critical functional groups during carbonization and are therefore promising for a wide range of applications. Most of the review’s efforts are to study possible hydrothermal liquefaction biochar applications in various fields, including fuel, metal and dye adsorption, pollutant reduction, animal feed, and biogas catalyst. The feasibility of biochar through the hydrothermal liquefaction process has been analysed via life-cycle assessment and energy evaluation. The article concludes with a brief discussion on possible issues and strategies for the sustainable development of hydrothermal liquefaction-based biochar.
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