Abstract:
The alternative of combining bioenergy with carbon capture and storage (BECCS) offers the prospect of minimizing greenhouse gas (GHG) emissions or even removing CO2 from the atmosphere. BECCS are an important approach to reach the target of 2°C as the maximum increase in the global average temperature by the end of this century. In Brazil, attention is drawn to the opportunities for BECCS in the sugar-energy sector, in which it is possible to combine the production of fuels and the generation of electricity from renewable biomass, and integrate them to capture the CO2 emitted in the conversion. This work aims to evaluate the technical-economic performance of BECCS systems in the generation of electricity using residual sugarcane biomass, in the Brazilian context. The integration of the carbon capture process in a typical sugarcane plant was evaluated considering two different cogeneration technologies and, finally, a thermoelectric plant was considered in which this unit uses surplus biomass from a nearby industry. The use of residual sugarcane biomass (bagasse and straw) was considered because of its availability on a large scale and at a relatively low cost in Brazilian sugarcane mills. The two power technologies included, the conventional condensing-extraction steam turbine (CEST), and biomass integrated gasification to combined cycles (BIG-CC). For the capture process, pre and post-combustion routes were compared, both technically feasible but impacted by high demands of steam. Compared to cogeneration, the results for thermoelectric power are favorable, but its location needs to be in a region where there is potentially a large amount of surplus biomass. The current stage of technological development of the BIG-CC technology indicates the impossibility of generating electricity and capturing CO2 in the short to medium term, a horizon in which the CEST technology can be used in demonstration projects. However, the alternative of capturing CO2 from fermentation, in the production of ethanol, should be prioritized, as it implies few energy penalties in the industry, has a relatively low cost and can reduce the carbon footprint of the biofuel.
Citación recomendada (normas APA)
Francisco Nieto Montaño, "Paisaje en la laguna de la Cocha", -:-, 2016. Consultado en línea en la Biblioteca Digital de Bogotá (https://www.bibliotecadigitaldebogota.gov.co/resources/3636404/), el día 2025-05-12.
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