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CO2 capture and storage from a bioethanol plant: Carbon and energy footprint and economic assessment

Abstract : Biomass energy and carbon capture and storage (BECCS) can lead to a net removal of atmospheric CO2. This paper investigates environmental and economic performances of CCS retrofit applied to two mid-sized refineries producing ethanol from sugar beets. Located in the Region Centre France, each refinery has two major CO2 sources: fermentation and cogeneration units "carbon and energy footprint" (CEF) and " discounted cash flow" (DCF) analyses show that such a project could be a good opportunity for CCS early deployment. CCS retrofit on fermentation only with natural gas fired cogeneration improves CEF of ethanol production and consumption by 60% without increasing much the non renewable energy consumption. CCS retrofit on fermentation and natural gas fired cogeneration is even more appealing by decreasing of 115% CO2 emissions, while increasing non renewable energy consumption by 40%. DCF shows that significant project rates of return can be achieved for such small sources if both a stringent carbon policy and direct subsidies corresponding to 25% of necessary investment are assumed. We also underlined that transport and storage cost dilution can be realistically achieved by clustering emissions from various plants located in the same area. On a single plant basis, increasing ethanol production can also produce strong economies of scale
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Audrey Laude, O. Ricci, G. Bureau, J. Royer-Adnot, A. Fabbri. CO2 capture and storage from a bioethanol plant: Carbon and energy footprint and economic assessment. International Journal of Greenhouse Gas Control, Elsevier, 2011, 5 (5), pp.1220-1231. ⟨10.1016/j.ijggc.2011.06.004⟩. ⟨hal-02163830⟩



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