http://pubs.rsc.org/en/content/articlelanding/2016/fd/c6fd00051g#!divAbstract
On the potential for BECCS efficiency improvement through heat recovery from both post-combustion and oxy-combustion facilities Niall Mac Dowell and Mathilde Fajardy Faraday Discuss., 2016, Accepted Manuscript DOI: 10.1039/C6FD00051G Abstract In order to mitigate climate change to no more than 2OC, it is well understood that it will be necessary to directly remove significant quantites of CO2 with bioenergy CCS (BECCS) regarded as a promising technology. However, BECCS will likely be more costly and less efficient at power generation than conventional CCS. Thus approaches to improve BECCS performance and reduce costs are of importance to facilitate the deployment of this key technology. In this study, the impact of biomass co-firing rate and biomass moisture content on BECCS efficiency with both post- and oxy-combustion CO2 capture technologies evaluated. It was found that post-combustion capture BECCS (PCC-BECCS) facilities will be appreciably less efficient than oxy-combustion capture BECCS (OCC-BECCS) facilities. Consequently, PCC-BECCS have the potential to be more carbon negative than OCC-BECCS per unit electricity generated. It was further observed that the biomass moisture content plays an important role in determining the BECCS facilitie efficiency. This will in turn effect the enthalpic content of the BECCS plant exhaust and implies that exhaust gas heat recovery may be an attractve option at higher rates of co-firing. It was found that there is the potential for the recovery of approximately 2.5 GJHeat/tCO2 at a temperature of 100OC from both PCC-BECCS and OCC-BECCS. On- and off-site applications for this recovered heat are discussed considering boiler feedwater pre-heating, solvent regeneration and distrct heating cases -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
