Thermodynamic analysis of an improved integrated biomass gasifier solid oxide fuel cell micro combined heat and power system

Limited overall efficiency and excessive complexity can hinder the competitiveness of biomass gasifier solid oxide fuel cell micro combined heat power systems. To overcome these problems, hydrocarbons direct internal reforming is analysed as a strategy to increase reduce system complexity. same end, two biosyngas heating-up strategies are compared: catalytic partial oxidation afterburner off gases utilization. A comprehensive approach combining thermodynamic equilibrium calculations, experimental measurements, modelling was used. The gas cleaning unit should operate at 400 °C decrease H 2 S HCl below 1 ppmv. tar amount 120–130 g Nm −3 dry for woodchips 190 straw pellets measured 2-methoxyphenol, hydroxyacetic acid hydroxyacetone were selected representative compounds. With cathode air flow rate decreases from approximately 90 kg h −1 60 . This leads an around 1% point in electrical even 5–6% points thermal efficiency. Direct seems therefore advantageous strategy. increases but reduces electric roughly 38%–30% not advised. • SOFC microCHP modelled analysed. tar. CPOX removal carried out before avoid ZnCl formation evaporation.