VERFAHREN ZUR ERZEUGUNG VON ELEKTRISCHER ENERGIE AUS REGENERATIVER BIOMASSE

摘要

The generation of electricity from regenerative biomass from plants, esp. from perennial plants forming C4 cpds. during photosynthesis, comprises prodn. of biomass in a prodn. module (1); gasification to a crude gas contg. H2 in a reformer module (2); formation of a pure fuel gas with a high H2 fraction from the crude gas in a treatment module (4); and electricity generation from the fuel gas in a current module (5). The process comprises: (a) producing biomass contg. little S and Cl from the plants by a suitable composting method in module (1); (b) operating the reformer module (2) using allothermal reformer(s) (3) with steam as gasifying agent; and (c) controlling the dwell of the biomass and/or crude gas and the pressure and temp. in the reformer such that alkali cpds. in the biomass are removed from the reformer with the ash and the tar formed as intermediate is gasified mainly to C oxides and H2; (d) producing fuel gas contg less than 1% C oxides in the treatment module (4); and (e) converting the fuel gas to current in the current module (5) in PEM (proton exchange membrane and/or polymer-electrolyte membrane) fuel cell(s) (6), in which the operating temp. and the H2 content and pressure of the fuel gas are balanced to give a high power density. Also claimed is the appts. used in 2 variants of this process.