Techno-enviro-economic analysis of integrated direct chemical looping coal-based power generation and methanol synthesis using renewable hydrogen

Surya Ayuati Ning Asih, Ahmad Syauqi, Widodo Wahyu Purwanto

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Techno-enviro-economic assessment was performed for an integrated coal power generation system with chemical looping and methanol synthesis using renewable hydrogen. The proposed process was simulated using Aspen Plus®. Chemical looping technology was applied to coal combustion simulated under various operating conditions to produce electricity and CO2-rich flue gas. Subsequently, the effects of the steam-to-carbon ratio (S/C) and oxygen carrier to fuel ratio (ϕ) on various parameters were evaluated. The CO2-rich flue gas was fed to a methanol synthesis plant, along with H2 produced from various technologies, such as methane steam reforming, biomass gasification, and photovoltaic (PV) electrolysis. Integrated direct chemical looping coal-based power generation and the methanol plant were evaluated from technical, environmental, and economical standpoints. The results show that the optimum S/C and ϕ are 0.93 and 1.4, respectively. Technical assessment to compare the hydrogen production technologies showed that PV electrolysis is the most efficient technology, with an efficiency of 67.08 %. Methanol production using hydrogen from a PV-solid oxide electrolyzer cell resulted in the lowest emission (0.013 kgCO2eq/MJ MeOH). Levelized cost analysis showed that the lowest methanol cost (434 $/ton) was obtained when hydrogen was produced by steam methane reforming.

Original languageEnglish
Article number101768
JournalJournal of CO2 Utilization
Volume54
DOIs
Publication statusPublished - Dec 2021

Keywords

  • Chemical looping
  • Coal
  • Hydrogen
  • Methanol
  • Techno-enviro-economic

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