Co-valorisation of sewage sludge and poultry litter waste for hydrogen production: Gasification process design, sustainability-oriented optimization, and systematic assessment

Tao Shi, Jianzhao Zhou, Jingzheng Ren, Yousaf Ayub, Haoshui Yu, Weifeng Shen, Qiao Li and Ao Yang

Energy, 2023, vol. 272, issue C

Abstract: In this work, a co-gasification process of sewage sludge and the poultry litter for hydrogen production was developed which involves gasification, water gas shift reaction, acid gas absorption and combustion for power generation. Based on the situations in Hong Kong, the complete processing system was simulated and optimized by developing a composite sustainability objective. The single objective was obtained by the fuzzy method after collecting the decision-making preferences on product yield, economic cost, safety index, environmental impacts, and exergy efficiency. Optimization results showed the exergy efficiency was 30.75%, and the gas turbine operation was most hazardous. The total life cycle greenhouse gas emission was estimated to be 832.58 tons/day with a hydrogen yield of about 47.92 tons/day according to the systematic analysis. Moreover, a subsidy of 115.65 $/ton waste can achieve a relatively attractive profit for the waste-to-H2 process, which was validated by an IRR value of 10% and a positive NPV value in 20 years. The economic sensitivity analysis was finished by testing the influence of some key factors. It was indicated that the subsidy fees, H2 market price, and total equipment cost were relatively more important in the financial profit for this process.

Keywords: Waste to hydrogen; Composite sustainability index; Process optimization; Subsidy fees; Safety analysis (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:272:y:2023:i:c:s036054422300525x

DOI: 10.1016/j.energy.2023.127131

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