Cost and performance analysis of biomass-based integrated gasification combined-cycle (BIGCC) power systems

Life cycle assessment of a biomass gasification combined-cycle power system

“…To reduce the emissions of VOCs from the power plant, a slipstream of the dryer exhaust gas is recycled to the char combustor. This configuration is a change from the original design and technoeconomic analysis given in Craig and Mann (1996). The cost of an additional blower and its electricity consumption result in a minimal increase in the selling price of electricity to 6.75 ¢/kWh in current dollars or 5.25 ¢/kWh in constant dollars.…”

“…To reduce wood dust and VOC emissions, a slipstream of the dryer exhaust gas is used as part of the combustion air source for the char combustor (see Figure 5 and 6). This configuration is a change from the original design as reported in Craig and Mann (1996). The ASPEN Plus™ model demonstrated that it was not feasible to recirculate the total dryer exhaust gas stream to the char combustor because the oxygen content of this stream is only 10 mol%.…”

“…An economic analysis previously performed for this biomass gasification combined cycle system was updated and a design change was incorporated to recycle a portion of the dryer exhaust gas to the char combustor in order to reduce the amount of VOCs emitted to the atmosphere. The original economic analysis for which the updated results are summarized below can be found in more detail in Craig and Mann (1996).…”

Performance analysis of integrated biomass gasification fuel cell (BGFC) and biomass gasification combined cycle (BGCC) systems

“…The energy efficiency of a biomass gasification site can be greatly enhanced if coupled with high efficiency power generation systems, such as solid oxide fuel cell (SOFC). While biomass gasification combined cycle (BGCC) is a proven technology (Bridgwater et al, 2002;Craig and Mann, 1996), a fully integrated biomass gasification fuel cell (BGFC) is yet to be established. Panopoulos et al (2006) had studied the integration between an allothermal biomass gasifier and a SOFC, both operating at an atmospheric pressure, for small scale CHP generation, which was assessed by modelling in Aspen Plus process simulation software.…”

“…The SOFC for higher power generation can be operated at a higher pressure than atmosphere (e.g. 10 kW of power generation from a SOFC system operating at 3.5 bar pressure, Cresswell and Metcalfe, 2006), while pressurised gasifiers are a commonplace (Bridgwater et al, 2002;Craig and Mann, 1996). This provides opportunities for process integration.…”