New Approach to Fuelization of Herbaceous Lignocelluloses through Simultaneous Saccharification and Fermentation Followed by Photocatalytic Reforming

Author

Masahide Yasuda (yasuda@cc.miyazak-u.ac.jp), Ryo Kurogi(tb14010@student.miyazaki-u.ac.jp), Hikaru Tsumagari(tb11020@student.miyazaki-u.ac.jp), Tsutomu Shiragami(t0g109u@cc.miyazak-u.ac.jp) and Tomoko Matsumoto (t-matsu@cc.miyazak-u.ac.jp)
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Energies, 2014, vol. 7, issue 7, pages 4087

Abstract: Bio-fuelization of herbaceous lignocelluloses through a simultaneous saccharification and fermentation process (SSF) and photocatalytic reforming (photo-Reform) was examined. The SSF of the alkali-pretreated bamboo, rice straw, and silvergrass was performed in an acetate buffer (pH 5.0) using cellulase, xylanase, and Saccharomyces cerevisiae at 34 °C. Ethanol was produced in 63%–85% yields, while xylose was produced in 74%–97% yields without being fermented because xylose cannot be fermented by S. cerevisiae . After the removal of ethanol from the aqueous SSF solution, the SSF solution was subjected to a photo-Reform step where xylose was transformed into hydrogen by a photocatalytic reaction using Pt-loaded TiO 2 (2 wt % of Pt content) under irradiation by a high pressure mercury lamp. The photo-Reform process produced hydrogen in nearly a yield of ten theoretical equivalents to xylose. Total energy was recovered as ethanol and hydrogen whose combustion energy was 73.4%–91.1% of that of the alkali-pretreated lignocelluloses (holocellulose).

Keywords: bamboo; rice straw; silvergrass; cellulase; xylanase; simultaneous saccharification and fermentation (SSF); hydrogen-evolution; Pt-loaded TiO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
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