title: Treatment variable effects on supercritical gasification of high-diversity grassland perennials.
abstract: Low-input high-diversity (LIHD) mixtures of native grassland perennials were subjected to a supercritical treatment process with the aim of obtaining hydrogen-rich gases. The process was studied based on the following treatment variables: reaction temperature (374 degrees C to 575 degrees C, corresponding to a pressure range of 22.1 to 40 MPa), residence time (10 to 30 min), biomass content in the feed, and catalysts (0% to 4% NaOH and solid alkali CaO-ZrO(2)). The gaseous phase produced from gasification of LIHD primarily consisted of hydrogen (H(2)), with a mixture of carbon monoxide (CO), methane (CH(4)), and carbon dioxide (CO(2)). The statistical significance of treatment variables was evaluated using analysis of variance (ANOVA). It showed that at the level of P < 0.05, temperature, catalysts, and biomass content in the feed significantly affected gas yields, while residence time was not significant.
authors.affiliation: BioTechnology Institute, University of Minnesota, 240 Gortner Labs, 1479 Gortner Avenue, St. Paul, MN 55108, USA. bzhang@ncat.edu
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zhang
authors.forename: Marc
authors.initials: M
authors.lastname: von Keitz
authors.forename: Kenneth
authors.initials: K
authors.lastname: Valentas
mesh_terms: D044822:Biodiversity; D018533:Biomass; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism; D002248:Carbon Monoxide / Q000032:analysis / Q000378:metabolism; D005740:Gases; D006859:Hydrogen / Q000032:analysis; D008697:Methane / Q000032:analysis / Q000378:metabolism; D006109:Poaceae / Q000254:growth & development / Q000378:metabolism; D011312:Pressure; D012987:Soil / Q000032:analysis; D013696:Temperature
chemical_list: D005740:Gases; D012987:Soil; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D006859:Hydrogen; D008697:Methane