Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7713865 | International Journal of Hydrogen Energy | 2015 | 10 Pages |
Abstract
Hydrogen production by supercritical water gasification (SCWG) of valine as a model for protein was examined in a fixed-bed reactor at 28 MPa. The effect of reaction temperature (500-710 °C), type of catalyst (AC, Ni-Y/AC, Ni-Pt/AC, and Ni-Pd/AC), and LHSV (24-72 hâ1) on the extent of gasification and gas composition was investigated. Total gas yield increased with increasing temperature up to 710 °C while carbon gasification efficiency (CGE) reached the highest value of 98.1% at 600 °C over the Ni-Y/AC catalyst. The three Ni-based catalysts promoted hydrogen formation reactions greater than the AC. In particular the Ni-Pt/AC and Ni-Pd/AC catalysts effectively reformed C2+ hydrocarbons intermediates to H2 and CO2. The Ni-Y/AC catalyst at 650 °C completely destroyed nitrogen-containing organic intermediates such as amines in the liquid effluent. The presence of Pt and Pd significantly suppressed the crystallization of Ni metal supported on AC in supercritical water.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
In-Gu Lee, Anna Nowacka, Chun-Hua Yuan, Sung-Jun Park, Je-Bok Yang,