Congxi Tao, Hao Wang, Jiazhi Yin, Qian Liang, Ming Wang, Qingmei Li, Xudong Wang
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Thermodynamic evaluation on the chemical looping co-gasification performances of Cr-containing tannery sludge and waste surgical mask
Clean disposal of Cr-containing tannery sludge (CTS) is a serious environmental issue because the high-content Cr is easily oxidized to toxically hexavalent. To realize the waste to energy, the CTS is used for syngas production via chemical looping co-gasification (CLCG) co-feeding with the waste surgical mask (WSM). The thermodynamic analysis is adopted to analyze the syngas’ quality, the chromium’s fate, and the N-, Cl-, and S-containing gaseous products under different gasification temperatures. Then, the effects of the mass flowrates of the steam, OC, and blending ratio of CTS in the feedstock are investigated. It is found that Cr in CTS can maintain trivalent chromium in the CLCG which is beneficial to the environment. Increasing gasification temperature can increase the Qm from 11.44 to 13.43 MJ/kg. More steam in the gasification agent enhances the H2 production and H2/CO ratio in CLCG while increasing OC circulation rate leads to the gasification towards combustion.
期刊介绍：
Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.
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