Hydrogen production by supercritical water gasification of valine over Niactivated charcoal catalyst modified with Y, Pt, and Pd》.pdfVIP

i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 0 ( 2 0 1 5 ) 1 2 0 7 8 e 1 2 0 8 7 Available online at ScienceDirect journal homepage: /locate/he Hydrogen production by supercritical water gasification of valine over Ni/activated charcoal catalyst modified with Y, Pt, and Pd * In-Gu Lee , Anna Nowacka, Chun-Hua Yuan, Sung-Jun Park, Je-Bok Yang Korea Institute of Energy Research, 152 Gajeong-ro Yuseong-gu, Daejeon, 305-343, Republic of Korea a r t i c l e i n f o a b s t r a c t Article history: Hydrogen production by supercritical water gasification (SCWG) of valine as a model for Received 24 April 2015 protein was examined in a fixed-bed reactor at 28 MPa. The effect of reaction temperature Received in revised form (500e710 C), type of catalyst (AC, NieY/AC, NiePt/AC, and NiePd/AC), and LHSV (24 17 July 2015 e72 h1) on the extent of gasification and gas composition was investigated. Total gas yield Accepted 23 July 2015 increased with increasing temperature up to 710 C while carbon gasification efficiency Available online 12 August 2015 (CGE) reached the highest value of 98.1% at 600 C over the NieY/AC catalyst. The three Ni- based catalysts promoted hydrogen formation reactions greater than the AC. In particular Keywords: the NiePt/AC and NiePd/AC catalysts effectively reformed C2þ hydrocarbons intermediates Supercritical water gasification to H and CO . The NieY/AC catalyst at 650 C completely d