Supercritical Aqueous Reforming (SCAR) of Digestate and Sewage Sludge into Green Gas
Recycling Consult, SPARQLE, Artifex, Jansen Wijhe, Hogeschool HAS, Urschel, Hygear, Buizer Advies, Staatsbosbeheer, Waterschap Aa en Maas, Waterschap Fryslan, Waterschap de Dommel
Biomass gasification in supercritical water is a rather new and challenging process. The reactions take place at high temperatures, high pressures in a water environment. The design of the reactor is important with respect to complete conversion of the reactants and avoiding the production of by-products that can plug or damage the reactor. Because of the use of wet biomass (sewage sludge) heat exchange between products and reactant is required for a high process efficiency. Heat transfer, hydrodynamics and phase changes are important aspects for an optimum design of such a heat exchanger. For both the reactor and heat exchanger mathematical models will be developed and validated against experimental data of the pilot-plant. The models will be used for further optimization of the reactor and heat exchanger.