Applied Energy, Vol.157, 255-266, 2015
Rewarding of extra-avoided GHG emissions in thermochemical biorefineries incorporating Bio-CCS
The incorporation of Bio-CCS, which involves an increase in investment and operating costs, would not be of interest in thermochemical biorefineries unless some economic benefit were provided. The rewarding of extra-avoided emissions encourages larger savings of GHG emissions in thermochemical biorefineries incorporating Bio-CCS. Therefore, there is a need for policies which reward of Bio-CCS incorporation, and in a broader sense, all extra-avoided emissions. In this study, we analyze how the geological storage of already captured CO2 (i.e. the incorporation of Bio-CCS) could be rewarded, taking different policy scenarios in the EU into consideration. Since thermochemical biorefineries achieve a GHG saving above the minimum target in the EU, the sale of all extra-avoided GHG emissions (not only from the geological storage of captured CO2) from energy carriers and chemicals is analyzed. Two different configurations of thermochemical biorefineries are analyzed: a biorefinery producing an energy carrier and a biorefinery co-producing an energy carrier and chemicals. Considering the sale of CO2 allowances in the European Emissions Trading Scheme (EU-ETS), current prices (5-15 (sic)/t) would not make Bio-CCS incorporation profitable. However, it would be profitable compare with current sequestration costs for conventional power plants (50-100 (sic)/t). If the sale of extra-avoided emissions from the production of energy carriers were included in the EU-ETS, the CO2 sequestration cost would be reduced, although not enough to enhance the process economy. If chemicals were included, the sequestration cost would decrease significantly. (C) 2015 Elsevier Ltd. All rights reserved.