A novel structure of natural gas, electricity, and methanol production using a combined reforming cycle: Integration of biogas upgrading, liquefied natural gas re-gasification, power plant, and methanol synthesis unit

Rui Hou, Nachuan Zhang, Chengsheng Yang, Jing Zhao, Peng Li and Bo Sun

Energy, 2023, vol. 270, issue C

Abstract: This paper proposes a novel power and methanol cogeneration due to biogas upgrading, liquefied natural gas cooling, and natural gas combined reforming. The proposed process consists of biogas upgrading, combined natural gas reforming and synthase, power plant, and methanol separation. The designed scheme performance is analyzed from energy, exergy, economic, and environmental assessments carried out by Aspen HYSIS software. The exergetic investigation revealed that the overall exergy destruction is about 14971.9 kW, in which the combined power cycle has the main portion of 39.11%. The results reveal the methanol and power generations capacity of 0.723 kW/kWMeOH and 16.68 kW/kWel, respectively. In this regard, the combustion chamber with 15.43% and the vapor generator with 14.65% share in total exergy destruction, have the main contribution to exergy destruction. Moreover, the total energy and exergetic efficiencies are calculated 77.6% and 91.3%. Also, the methanol and power production cost rates are obtained 0.23 USD/kg and 0.041 USD/kWh. Finally, the environmental analysis shows that the system's CO2 footprint is 0.039 kgCO2/MJ.

Keywords: Biogas upgrading; Methanol production; Economic analysis; Environmental analysis; Liquefied natural gas (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:270:y:2023:i:c:s0360544223002360

DOI: 10.1016/j.energy.2023.126842

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