Hydrogen production from some agricultural residues by catalytic subcritical and supercritical water gasification

Hydrothermal gasification of Rosa Damascena residues: Gaseous and aqueous yields

“…The mean conversions of GS, GSD and GH to total gaseous and aqueous products are 65, 79 and 80% while 90, 89, and 90% in the presence or absence of catalysts at 500 • C and 600 • C, respectively. High conversion values are available for biomass samples that have high cellulose contents [27]. Carbon balance of product yields (gaseous, aqueous and residue) in this study is within 85-90%.…”

“…It is concluded that the gasification mechanism is still very complex, including hydrolysis, steam reforming, water-gas shift reaction, methanation and other reactions. Details on hydrothermal gasification in relation to various kinds of real biomass or biomass model compounds can be widely found in the literature [25][26][27][28][29].…”

Applications of subcritical and supercritical water conditions for extraction, hydrolysis, gasification, and carbonization of biomass: a critical review

“…Li et al (2011) observed that Cu improved the catalytic performance of Ni in reforming reactions to generate H2, and that Cu also mitigated sintering of alumina whilst Co promoted Ni-based catalysis with respect to hydrogen selectivity. Madenoğlu et al (2012) studied the sub-and supercritical gasification behavior of cotton and tobacco stalks with water as supercritical fluid at 300-600°C with addition of 10 wt.% of natural mineral catalysts, and found that Trona was most effective while Dolomite was least efficient. They claimed H2 yields as high as 42.9% and 39.9% from tobacco and cotton stalks using Trona as catalyst at 600°C, respectively.…”

Processing of Biomass with Hydrothermal and Supercritical Water

“…For examples, the reader is referred to the following publications [163,167,175,176,178,[183][184][185]. Organic materials can be gasified efficiently in supercritical water.…”