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Bio-methane and bio-methanol co-production from biogas: A profitability analysis to explore new sustainable chemical processes

Baena-Moreno, Francisco M., Pastor-Pérez, Laura, Wang, Qiang and Reina, T.R. (2020) Bio-methane and bio-methanol co-production from biogas: A profitability analysis to explore new sustainable chemical processes Journal of Cleaner Production, 265, 121909.

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Herein a potential synergy between biogas upgrading and CO2 conversion to bio-methanol is investigated. This novel idea arises as an alternative path to the traditional biogas – to – bio-methane route which involves CO2 separation. In this work a techno-economic analysis of the process was performed to study the profitability for potential investors. A total of 15 scenarios were analysed. Different biogas plant sizes were examined as baseline scenarios: 100, 250, 500, and 1000 m³/h. Furthermore the potential effect of governmental incentives through bio-methane subsidies (feed-in tariffs and investment percentage) was studied. Finally a sensitivity analysis was developed to study the effect of key parameters. The results of the baseline scenarios demonstrated that not profitable results can be obtained without subsidies. Bio-methane subsidies as feed-in tariffs proved to be effective for the 500 and 1000 m³/h plant sizes. For a feed-in tariff subsidy of 40 €/MW, 500 m³/h biogas production plants are remarkably profitable (net present value equal to 3106 k€). Concerning 1000 m³/h biogas production plants, 20 €/MW of subsidies as feed-in tariffs gives similar net present value result. Our results point out that only big biogas production can produce bio-methanol at profitable margins under 90–100% of investment subsidied. The sensitivity analysis showed that electricity, natural gas and bio-methanol price can affect considerably to the overall profitability, converting predicted positive cases in negative scenarios.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Baena-Moreno, Francisco
Pastor-Pérez, Laura
Wang, Qiang
Date : 20 August 2020
Funders : Engineering and Physical Sciences Research Council (EPSRC), Royal Society
DOI : 10.1016/j.jclepro.2020.121909
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Depositing User : Clive Harris
Date Deposited : 01 Jun 2020 13:07
Last Modified : 01 Jun 2020 13:07

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