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, Ao Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

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.

Original languageEnglish
Article number127131
Number of pages15
JournalEnergy
Volume272
DOIs
Publication statusPublished - 1 Jun 2023

Keywords

  • Composite sustainability index
  • Process optimization
  • Safety analysis
  • Subsidy fees
  • Waste to hydrogen

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Mechanical Engineering
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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