No abstract

Keywords:Carbon capture and utilisation CO 2 economy CO 2 -based polyols CO 2 emissions reduction Pedigree analysis A B S T R A C T CO 2 utilisation is gaining interest as a potential element towards a sustainable economy. CO 2 can be used as feedstock in the synthesis of fuels, chemicals and polymers. This study presents a prospective assessment of carbon capture from a hydrogen unit at a refinery, where the CO 2 is either stored, or partly stored and partly utilised for polyols production. A methodology integrating technical, economic and environmental models with uncertainty analysis is used to assess the performance of carbon capture and storage or utilisation at the refinery.Results show that only 10% of the CO 2 captured from an industrial hydrogen unit can be utilised in a commercial-scale polyol plant. This option has limited potential for large scale CO 2 mitigation from industrial sources. However, CO 2 capture from a hydrogen unit and its utilisation for the synthesis of polyols provides an interesting alternative from an economic perspective. The costs of CO 2 -based polyol are estimated at 1200 €/t polyol, 16% lower than those of conventional polyol. Furthermore, the costs of storing the remaining CO 2 are offset by the benefits of cheaper polyol production. Therefore, the combination of CO 2 capture and partial utilisation provides an improved business case over capture and storage alone. The environmental assessment shows that the climate change potential of this CO 2 utilisation system is 23% lower compared to a reference case in which no CO 2 is captured at the refinery. Five other environmental impact categories included in this study present slightly better performance for the utilisation case than for the reference case.

No abstract

No abstract

No abstract

No abstract

No abstract