Hydrogen Production by SCWG Treatment of Wastewater from Amino Acid Production Process

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The organic wastewater obtained from an amino acid production process was treated by supercritical water gasification (SCWG) method for achieving water purification and hydrogen production. A set of SCWG experiments was also carried out with glucose and valine solutions as model compounds for reducing sugars and amino acids present in the wastewater, respectively. The effect of temperature (600-700 degrees C) and different catalysts (activated charcoal (AC), Ni/AC, and Ni-Y/AC) on the extent of gasification and gas composition was investigated in a continuous-flow reactor at 28 MPa and 12 h(-1) LHSV. Complete gasification of organic compounds in the wastewater was achieved in the presence of the supported nickel catalysts, resulting in the formation of gaseous products with high hydrogen contents. Alkaline salts present in the wastewater feed contributed to hydrogen formation reactions. Solid product formed during the SCWGs of the wastewater feed was identified as one of main obstacles for a possible commercial design and a schematic concept was suggested for its removal.
Publisher
Amer Chemical Soc
Issue Date
2010-11
Language
English
Article Type
Article; Proceedings Paper
Keywords

SUPERCRITICAL WATER; BIOMASS GASIFICATION; HYDROTHERMAL GASIFICATION; MOLASSES FERMENTATION; ORGANIC WASTES; GLUCOSE; DECOMPOSITION; OXIDATION; KINETICS; LIGNIN

Citation

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.49, no.21, pp.10974 - 10980

ISSN
0888-5885
URI
http://hdl.handle.net/10203/95419
Appears in Collection
CBE-Journal Papers(저널논문)
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