Environmental assessment of biomass gasification combined heat and power plants with absorptive and adsorptive carbon capture units in Norway

摘要: Abstract Negative emissions through carbon capture processes integrated with bioenergy plants are frequently seen as an important option to stabilise climate at low temperature levels for reaching the two degree target in a cost effective way. Climate neutrality of biogenic CO 2 is commonly assumed while assessing credits these systems however this simplification may cause overestimation benefits long rotation period woody biomass fuelled (time gap between emitted and sequestrated ). Carbon associated increase material energy demand can lead environmental trade-offs due higher values other mid-point impacts reducing change potential. In work, comparative life cycle assessment study undertaken. Three configurations have been analysed: i) combined heat power (CHP 10 MW th input gasification plant (BGP); ii) BGP pre-combustion adsorptive unit (ADS); iii) post combustion absorptive (ABS). For both which CCS incorporated, negative potential reported. A decrease 144.7% observed ADS 195% estimated ABS, when employing specially modelled characterisation factors that take into account temporal asymmetry emission removal fluxes. most performance indicators analysed quantified installed despite lower on site some stressors co-capture by separation agents (H S, SO x PM ADS). solvent based unit, larger absolute (per kWh e basis) specific (per kg captured ) increases thus exhibiting worse than CHP adsorption technology.