Continuous supercritical water gasification of isooctane: A promising reactor design

High-yield hydrogen production from glucose by supercritical water gasification without added catalyst

“…The reactor is equipped with a cooling tube that utilizes outside air. Our updraft SCWG apparatus has better flow stability and higher hydrogen gas yield than those with vertical reactor geometry, as discussed in detail in our previous paper [32]. When isooctane was gasified, a hydrogen gas yield of 12.4 mol/mol isooctane was achieved at 765 C and 25 MPa, with a residence time of 106 s, which corresponds to w50% of the theoretical maximum (25 mol/mol isooctane), and 92% of the equilibrium hydrogen gas yield (13.6 mol/mol isooctane).…”

“…Recently, we proposed a new reactor geometry to enhance gasification efficiency and hydrogen gas yield in supercritical water at temperatures of 600e750 C in the absence of catalysts [32,33]. The SCWG reactor has an inclination of 15 from the horizontal, and organic feedstock is fed from the bottom to the top.…”

Supercritical Water Gasification of Municipal Sludge: A Novel Approach to Waste Treatment and Energy Recovery

“…When temperature was increased in SCWG, for example, from 601°C to 676°C, CH4 yield was reduced and H2 yield doubled (Susanti et al, 2010). A similar, inverse effect was observed as temperature declined.…”

“…Temperature is considered the most sensitive variable in SCWG processes, with 600°C serving as an often-cited, optimal target temperature due to associated high conversion rates (D'Jesús et al, 2006;Elliott, 2008;Susanti et al, 2010). When temperature was increased in SCWG, for example, from 601°C to 676°C, CH4 yield was reduced and H2 yield doubled (Susanti et al, 2010).…”

Cogeneration of renewable energy from biomass (utilization of municipal solid waste as electricity production: gasification method)

“…From the viewpoint of thermodynamics, higher temperature is essential for hydrogen production. Temperature is considered the most sensitive variable in SCWG processes, with 600°C serving as an often-cited, optimal target temperature due to associated high conversion [20][21][22].…”