Integration of an Electrolysis Unit for Producer Gas Conditioning in a Bio-Synthetic Natural Gas Plant

Mesfun S, Lundgren J, Toffolo A, Lindbergh G, Lagergren C, & Engvall K (2018). Integration of an Electrolysis Unit for Producer Gas Conditioning in a Bio-Synthetic Natural Gas Plant. Journal of Energy Resources Technology 141 (1): e012002. DOI:10.1115/1.4040942.

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Abstract

Producer gas from biomass gasification contains impurities like tars, particles, alkali salts, and sulfur/nitrogen compounds. As a result, a number of process steps are required to condition the producer gas before utilization as a syngas and further upgrading to final chemicals and fuels. Here, we study the concept of using molten carbonate electrolysis cells (MCEC) both to clean and to condition the composition of a raw syngas stream, from biomass gasification, for further upgrading into synthetic natural gas (SNG). A mathematical MCEC model is used to analyze the impact of operational parameters, such as current density, pressure and temperature, on the quality and amount of syngas produced. Internal rate of return (IRR) is evaluated as an economic indicator of the processes considered. Results indicate that, depending on process configuration, the production of SNG can be boosted by approximately 50-60% without the need of an additional carbon source, i.e., for the same biomass input as in standalone operation of the GoBi-Gas plant.

Item Type: Article
Uncontrolled Keywords: Electrolysis; Molten-carbonate; Process integration; Renewable electricity; SNG; Techno-economics
Research Programs: Ecosystems Services and Management (ESM)
Depositing User: Luke Kirwan
Date Deposited: 04 Sep 2018 06:23
Last Modified: 04 Sep 2018 06:23
URI: http://pure.iiasa.ac.at/15437

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