Abstract
Owing to an environment-friendly utilization of resources, increased attention has been focused on fuels and chemicals from biomass as an alternative to fossil resources. In addition, supercritical fluid technology has been considered to be an environmentally-benign treatment. Therefore, its technology was applied for a conversion of biomass to useful fuels and chemicals in order to mitigate environmental loading. For example, supercritical water treatment has demonstrated that lignocelluloscs can be hydrolyzed to become lignin-derived products for useful aromatic chemicals and carbohydrate-derived products, such as polysaccharides, oligosaccharides and monosaccharides of glucose, mannose and xylose used for subsequent ethanol fermentation. If this treatment is prolonged, lignocellulosics were found to be converted to organic acids such as formic, acetic, glycolic and lactic acids which can be converted to methane for biofuel. When alcohols, such as methanol and ethanol, were used instead of water, some other useful products were achieved, and its liquefied products were found to have a potential for liquid biofuel. In this study, therefore, our research achievements in supercritical fluid science of woody biomass will be introduced for clean and green chemistry for a sustainable environment.
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Ehara K, Saka S. 2002a. A comparative study on chemical conversion of cellulose between the batch-type and flow-type systems in supercritical water. Cellulose. 9: 301–311
Ehara K, Saka S. 2002b. Characterization of the lignin-derived products from woods as treated in supercritical water. J. Wood Sci., 48: 320–325
Ehara K, Saka S. 2004. Recent progress in transformation of lignocellulosies to fuels and chemicals by supercritical water technology. In: Hayashi K (ed.), ACS Book Ser. 889, Lignocellulose Biodegradation. ACS. 69–83
Ehara K, Saka S. 2005. Decomposition behavior of cellulose by supercritical water, suberitical water and their combined treatments. J. Wood Sci., 51: 148–153
Ishikawa Y, Saka S. 2001. Chemical conversion of cellulose as treated in supercritical methanol. Cellulose, 8: 189–195
Kusdiana D, Saka S. 2001a. Kinetics of transesterification in rapeseed oil to biodiesel fuel as treated in supercritical methanol. Fuel, 80: 693–698
Kusdiana D, Saka S. 2001b. Methyl esterification of free fatty acids of rapeseed oil as treated in supercritical methanol. J. Chem. Eng. Japan, 34: 383–387
Kusdiana D, Saka S. 2004a. Effects of water on biodiesel fuel production by supercritical methanol treatment. Bioresource Technol., 91: 288–294
Kusdiana D, Saka S. 2004b. Two-step preparation for a catalyst-free biodiesel production: hydrolysis and methyl esterification. Appl. Biochem. Biotechnol., 113–116: 781–791
Kusdiana D, Saka S. 2004c. New process for non-catalytic biodiesel production via hydrolysis and subsequent methyl esterification. In: 2nd World Conference and Technology Exhibition on Biomass for Energy, Industry and Climate Protection, Rome. 1,484–1,487
Minami E. Saka S. 2003. Comparison of the decomposition behaviors of hardwood and softwood in supercritical methanol. J. Wood Sci., 49: 73–78
Minami E, Saka S. 2004. Chemical conversion of woody biomass in supercritical methanol to liquid fuel. In: Science in Thermal and Chemical Biomass Conversion. Victoria (in press)
Saka S, Kusdiana D. 2001. Biodiesel fuel from rapeseed oil as prepared in supercritical methanol. Fuel, 80: 225–231
Saka S. 2004. Biofuel production by supercritical fluid technologies. Sci. Mach., 56: 717–725
Shioji M, Ishiyama T, Minami E, Saka S. 2002. Feasibility of the methanol-solubles of wood prepared in supercritical methanol as a diesel fuel. Kyoto Univ. Int. Sym. on Post-Petrofuels in the 21st Century. Montreal, Canada. 321–324
Takada D, Ehara K, Saka S. 2004. Gas chromatographic and mass spectrometoric (GC-MS) analysis of lignin-derived products from Cryptomeria japonica treated in supercritical water. J. Wood Sci., 50: 253–259
Yamazaki J, Minami E, Saka S. 2004. Decomposition behavior of woody biomass as treated in various supercritical alcohols. In: Science in Thermal and Chemical Biomass Conversion. Victoria (in press)
Yoshida K, Kusaki J, Ehara K, Saka S. 2005. Characterization of low molecular weight organic acids from beech wood treated in supercritical water. Appl. Biochem. Biotechnol., 121–124: 795–806
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Saka, S. Recent progress in supercritical fluid science for biofuel production from woody biomass. For. Stud. China 8, 9–15 (2006). https://doi.org/10.1007/s11632-006-0016-5
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DOI: https://doi.org/10.1007/s11632-006-0016-5