Hydrochar derived from green waste by microwave hydrothermal carbonization

Yuchao Shao, Yuyang Long, Hengyi Wang, Dongyun Liu, Dongsheng Shen and Ting Chen

Renewable Energy, 2019, vol. 135, issue C, 1327-1334

Abstract: Green waste (GW), rich in cellulose and hemicellulose, is a valuable resource. Developing alternative sustainable technologies to utilize GW is attracting increasing attention. In this study, microwave hydrothermal carbonization (MHTC) process parameters including holding temperature, holding time, and liquid-to-solid ratio were optimized by a response surface design to tailor the properties of hydrochar. The hydrochar characteristic was mainly evaluated by the calorific value. The results showed that the highest hydrochar calorific value (∼23.01 MJ kg−1) could be observed at a holding temperature of 190 °C, a holding time of 1 h and liquid-to-solid ratio of 8:1. Correspondingly, the hydrochar yield ranged from 50.40% to 76.80%. The economic evaluation of hydrochar was also done in this work. These results show that the GW-derived hydrochar warrants further investigations as a fuel source and as an adsorbent material.

Keywords: Microwave hydrothermal carbonization; Green waste; Hydrochar; Calorific value; Response surface design (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:135:y:2019:i:c:p:1327-1334

DOI: 10.1016/j.renene.2018.09.041

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