Techno-economic assessment of a novel integrated multigeneration system to synthesize e-methanol and green hydrogen in a carbon-neutral context

Usman Safder, Jorge Loy-Benitez and ChangKyoo Yoo

Energy, 2024, vol. 290, issue C

Abstract: A novel and efficient multigeneration system aiming to achieve near-zero CO2 emissions is proposed. The system employs a methanol production process utilizing captured CO2 from the flue gas of a biomass-gasification plant. The proposed system successfully generates green H2 through water electrolysis, supported by thermal power, with a portion of the hydrogen reacting with CO2 to produce e-methanol. Additionally, the system produces other valuable products, including power, cooling, O2, and CO2, in a coherent manner, benefiting from a low-emission framework and exhibiting high thermodynamic performance. The proposed multigeneration system consists of a biomass-gasification-based power plant, a water electrolyzer, a methanol generation unit, a carbon capture unit, and a steam jet ejector-based refrigeration cycle. The integrated multigeneration system is analyzed from the energy, exergy, and economic aspects. The results demonstrate the system's ability to achieve production rates of 430.25 kg/h of e-methanol and 190 kg/h of green H2. Furthermore, the energy and exergy efficiencies of the system are found to be 78.13% and 71.63%, respectively. The CO2 emissions analysis reveals that the proposed system significantly reduced total CO2 emission to 78.5% (0.61 kgCO2/kg). The total cost of production is estimated to be 0.087 $/kg.

Keywords: Carbon capture; Cleaner energy; e-methanol; Green hydrogen; Sustainability (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:290:y:2024:i:c:s0360544223034989

DOI: 10.1016/j.energy.2023.130104

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