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Reconciling the sustainable manufacturing of commodity chemicals with feasible technoeconomic outcomes assessing the investment case for heat integrated aerobic gas fermentation

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Rodgers, S 
Conradie, A 
King, R 
Poulston, S 
Hayes, M 

Abstract

jats:pThe manufacturing industry must diverge from a ‘take, make and waste’ linear production paradigm towards more circular economies. Truly sustainable, circular economies are intrinsically tied to renewable resource flows, where vast quantities need to be available at a central point of consumption. Abundant, renewable carbon feedstocks are often structurally complex and recalcitrant, requiring costly pretreatment to harness their potential fully. As such, the heat integration of supercritical water gasification (SCWG) and aerobic gas fermentation unlocks the promise of renewable feedstocks such as lignin. This study models the technoeconomics and life cycle assessment (LCA) for the sustainable production of the commodity chemicals, isopropanol and acetone, from gasified Kraft black liquor. The investment case is underpinned by rigorous process modelling informed by published continuous gas fermentation experimental data. Time series analyses support the price forecasts for the solvent products. Furthermore, a Monte Carlo simulation frames an uncertain boundary for the technoeconomic model. The technoeconomic assessment (TEA) demonstrates that production of commodity chemicals priced at ~US$1000 per tonne is within reach of aerobic gas fermentation. In addition, owing to the sequestration of biogenic carbon into the solvent products, negative greenhouse gas (GHG) emissions are achieved within a cradle-to-gate LCA framework. As such, the heat integrated aerobic gas fermentation platform has promise as a best-in-class technology for the production of a broad spectrum of renewable commodity chemicals.</jats:p>

Description

Keywords

31 Biological Sciences, 4104 Environmental Management, 3106 Industrial Biotechnology, 38 Economics, 41 Environmental Sciences, 13 Climate Action, 12 Responsible Consumption and Production

Journal Title

Johnson Matthey Technology Review

Conference Name

Journal ISSN

2056-5135
2056-5135

Volume Title

65

Publisher

Johnson Matthey

Rights

All rights reserved