Thermodynamic efficiency of carbon capture and utilisation in anaerobic batch digestion process

Oh, Sung T. and Martin, Alastair Douglas (2016) Thermodynamic efficiency of carbon capture and utilisation in anaerobic batch digestion process. Journal of CO2 Utilization, 16. pp. 182-193. ISSN 2212-9820

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Abstract

Carbon capture and storage (CCS) in the oil and water industries is becoming common and a significant consumer of energy typically requiring 150–450 °C and or several hundred bar pressure [1] particularly in geological deposition. A biological carbon capture and conversion has been considered in conventional anaerobic digestion processes. The process has been utilised in biological mixed culture, where acetoclastic bacteria and hydrogenophilic methanogens play a major key role in the utilisation of carbon dioxide. However, the bio catalytic microorganisms, hydrogenophilic methanogens are reported to be unstable with acetoclastic bacteria. In this work the biochemical thermodynamic efficiency was investigated for the stabilisation of the microbial process in carbon capture and utilisation. The authors observed that a thermodynamic efficiency of biological carbon capture and utilisation (BCCU) had 32% of overall reduction in yield of carbon dioxide with complimentary increase of 30% in yield of methane, while the process was overall endothermic. Total consumption of energy (≈0.33 MJ l−1) was estimated for the carbonate solubility (0.1 mol l−1) in batched BCCU. This has a major influence on microbial composition in the bioreactor. This thermodynamic study is an essential tool to aid the understanding of the interactions between operating parameters and the mixed microbial culture.

Item Type:
Journal Article
Journal or Publication Title:
Journal of CO2 Utilization
Additional Information:
This is the author’s version of a work that was accepted for publication in Journal of CO2 Utilization. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of CO2 Utilization, 16, 2016 DOI: 10.1016/j.jcou.2016.07.006
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500/1501
Subjects:
ID Code:
80530
Deposited By:
Deposited On:
26 Jul 2018 09:22
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Nov 2020 04:06