Syngas fermentation to ethanol: the effects of gas recycling on economics

Haneef Shijaz; Fausto Gallucci; Adrie Straathof; John Posada

doi:10.1016/B978-0-443-15274-0.50391-7

Syngas fermentation to ethanol: the effects of gas recycling on economics

Haneef Shijaz, Fausto Gallucci, Adrie Straathof, John Posada

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

1 Citation (Scopus)

Abstract

Syngas fermentation is a biochemical pathway to produce ethanol and has been commercialized successfully. The economic viability of this process could be further improved to become more competitive in the existing ethanol market. Improving gas utilization is the key, and can be done by recycling the unreacted syngas. This work is an early-stage techno-economic assessment of recycling in producing ethanol from Basic Oxygen Furnace (BOF) gas. Economic viability is measured in terms of Relative Competitive Percentage (RCP) and is a measure of closeness to the current market. Two scenarios, firstly a once-through process, and secondly a process with recycling (0.9 split ratio: recycle/purge) of gas is considered. None of them showed a positive RCP as compared to the current ethanol market. Comparing these scenarios, beyond the single pass conversion of 60%, the additional production costs due to recycling become dominating and lead to a lower RCP compared to once-through systems.

Original language	English
Title of host publication	Computer Aided Chemical Engineering
Editors	Antonios C. Kokossis, Michael C. Georgiadis, Efstratios Pistikopoulos
Publisher	Elsevier
Pages	2459-2464
Number of pages	6
Volume	52
ISBN (Print)	978-0-443-23553-5
DOIs	https://doi.org/10.1016/B978-0-443-15274-0.50391-7
Publication status	Published - Jan 2023

Publication series

Name	Computer Aided Chemical Engineering
Volume	52
ISSN (Print)	1570-7946

Bibliographical note

Funding Information:
This publication is part of the project Microsync (with project number P16-10 project 7 of the research programme Perspectief Novel Approaches for Microbial Syngas Conversion to Chemical Building Blocks 2017 TTW. Project title: 'Process design and sustainability assessment' which is (partly) financed by the Dutch Research Council (NWO).

Publisher Copyright:
© 2023 Elsevier B.V.

Funding

This publication is part of the project Microsync (with project number P16-10 project 7 of the research programme Perspectief Novel Approaches for Microbial Syngas Conversion to Chemical Building Blocks 2017 TTW. Project title: 'Process design and sustainability assessment' which is (partly) financed by the Dutch Research Council (NWO).

Keywords

Basic oxygen furnace Gas
Ethanol
Profitability
Recycling
Syngas fermentation

Access to Document

10.1016/B978-0-443-15274-0.50391-7

Cite this

Shijaz, H., Gallucci, F., Straathof, A., & Posada, J. (2023). Syngas fermentation to ethanol: the effects of gas recycling on economics. In A. C. Kokossis, M. C. Georgiadis, & E. Pistikopoulos (Eds.), Computer Aided Chemical Engineering (Vol. 52, pp. 2459-2464). (Computer Aided Chemical Engineering; Vol. 52). Elsevier. https://doi.org/10.1016/B978-0-443-15274-0.50391-7

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Syngas fermentation to ethanol: the effects of gas recycling on economics. / Shijaz, Haneef; Gallucci, Fausto; Straathof, Adrie et al.
Computer Aided Chemical Engineering. ed. / Antonios C. Kokossis; Michael C. Georgiadis; Efstratios Pistikopoulos. Vol. 52 Elsevier, 2023. p. 2459-2464 (Computer Aided Chemical Engineering; Vol. 52).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic › peer-review

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AB - Syngas fermentation is a biochemical pathway to produce ethanol and has been commercialized successfully. The economic viability of this process could be further improved to become more competitive in the existing ethanol market. Improving gas utilization is the key, and can be done by recycling the unreacted syngas. This work is an early-stage techno-economic assessment of recycling in producing ethanol from Basic Oxygen Furnace (BOF) gas. Economic viability is measured in terms of Relative Competitive Percentage (RCP) and is a measure of closeness to the current market. Two scenarios, firstly a once-through process, and secondly a process with recycling (0.9 split ratio: recycle/purge) of gas is considered. None of them showed a positive RCP as compared to the current ethanol market. Comparing these scenarios, beyond the single pass conversion of 60%, the additional production costs due to recycling become dominating and lead to a lower RCP compared to once-through systems.

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ER -

Syngas fermentation to ethanol: the effects of gas recycling on economics

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Keywords

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