摘要：Bioenergy with carbon capture and storage (BECCS) is one strategy to remove COsub2/sub from the atmosphere. To assess the potential scale and cost of COsub2/sub sequestration from BECCS in the US, this analysis models carbon sequestration net of supply chain emissions and costs of biomass production, delivery, power generation, and COsub2/sub capture and sequestration in saline formations. The analysis includes two biomass supply scenarios (near-term and long-term), two biomass logistics scenarios (conventional and pelletized), and two generation technologies (pulverized combustion and integrated gasification combined cycle). Results show marginal cost per tonne COsub2/sub (accounting for costs of electricity and COsub2/sub emissions of reference power generation scenarios) as a function of COsub2/sub sequestered (simulating capture of up to 90% of total COsub2/sub sequestration potential) and associated spatial distribution of resources and generation locations for the array of scenario options. Under a near-term scenario using up to 206 million tonnes per year of biomass, up to 181 million tonnes COsub2/sub can be sequestered annually at scenario-average costs ranging from $62 to $137 per tonne COsub2/sub; under a long-term scenario using up to 740 million tonnes per year of biomass, up to 737 million tonnes COsub2/sub can be sequestered annually at scenario-average costs ranging from $42 to $92 per tonne COsub2/sub. These estimates of COsub2/sub sequestration potential may be reduced if future competing demand reduces resource availability or may be increased if displaced emissions from conventional power sources are included. Results suggest there are large-scale opportunities to implement BECCS at moderate cost in the US, particularly in the Midwest, Plains States, and Texas.
关键词：BECCS; bioenergy with carbon capture and storage; bioenergy; biopower; biomass resources; biomass logistics; biomass economics
