Steam gasification of energy crops of high cultivationpotential in Poland to hydrogen-rich gas

摘要

In the paper energy crops of considerable cultivation potential in Poland, namely: Salix viminalis, Helianthus tuberosus, Sida hermaphrodita, Spartina pectinata, Andropogon gerardi and Miscanthus X giganteus were tested in terms of steam gasification reactivity of biomass chars, as well as yields and composition of product gas in steam gasification and lime-enhanced steam gasification in a laboratory scale fixed bed reactor at 650 °, 700 ° and 800 ℃. The highest value of reactivity for 50% of carbon conversion, R_(50), was observed for Sida hermaphrodita, regardless the process temperature. Application of CaO for in-situ CO_2 capture in steam gasification of biomass chars resulted in hydrogen content increase at 650 ℃ to the levels comparable with the ones reached at 800 ℃ without carbonation reaction. Also hydrogen and total gas yields increased in tests of lime-enhanced gasification.