A pyrolysis of compost for the production of syngas with an explicit H2/CO = 2 or H2/CO = 3 was investigated in this study. The composts were obtained from nonhybrid (perennial) grasses (NHG) and hybrid (perennial) grasses (HG). Discrepancies in H2 evolution profiles were found between NHG and HG composts. In addition, positive correlations for NHG composts were obtained between (i) H2 yield and lignin content, (ii) H2 yield and potassium content, and (iii) CO yield and cellulose content. All composts resulted in H2/CO = 2 and five of the nine composts resulted in H2/CO = 3. Exceptionally large higher heating values (HHVs) of pyrolysis gas, very close to HHVs of feedstock, were obtained for composts made from mountain brome (MB, 16.23 MJ/kg), hybrid Becva (FB, 16.45 MJ/kg), and tall fescue (TF, 17.43 MJ/kg). The MB and FB composts resulted in the highest syngas formation with H2/CO = 2, whereas TF compost resulted in the highest syngas formation with H2/CO = 3.

Department of Energy Faculty of Mechanical Engineering VŠB Technical University of Ostrava 17 listopadu 15 2172 708 33 Ostrava Poruba Czech Republic

ENET Energy Units for Utilization of Non Traditional Energy Sources VŠB Technical University of Ostrava 17 listopadu 15 2172 708 33 Ostrava Poruba Czech Republic

Institute of Geological Engineering Faculty of Mining and Geology VŠB Technical University of Ostrava 17 listopadu 15 2172 708 33 Ostrava Poruba Czech Republic

OSEVA PRO s r o Grass Research Institute Rožnov Zubří Hamerská 698 756 54 Zubří Czech Republic

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