| 초록 |
Supercritical water gasification is a promising alternative method to achieve energy production and environmental cleanup by converting aqueous organic compounds to a combustible syngas without drying procedure which is a cost-intensive process. In this work, supercritical water gasification of valine as a model compound for nitrogenous compounds such as sewage sludge or molasses-fermented wastes was carried out in a tubular fixed-bed reactor at 28 MPa. Effect of catalyst, reaction temperature, and LHSV on the gasification efficiencies and product distribution was investigated. The presence of Ni-Y/AC significantly increased gasification efficiencies and TOC destruction. For example, carbon gasification efficiency and TOC destruction was 8.2 % and 56.2 %, respectively without catalyst but they increased to 63.4 % and 98.2%, respectively in the presence of Ni-Y/AC catalyst at the same temperature. The Ni-Y/AC catalyst promoted H2 production pathways such as reforming and water-gas shift reactions. |
