Experimental investigation on hydrogen production by corn cob gasification in supercritical water

The raw biomass feedstock of core cob mixed in sodium carboxymethylcellulose (CMC) was gasified for hydrogen production at a pressure range from 22.5MPa to 27.5MPa and a well temperature range from 550°C to 650°C with a reactor residence time of 0.33-0.67 min in a tubular flow reactor. Using orthogonal experimental method, the influences of the main parameters on corn cob gasification were investigated, and the optimum parameters in the experiment conditions were obtained. Results show that hydrogen yield is very sensitive to the temperature and high temperature is in favor of hydrogen production. The maximal hydrogen yield was attained at a pressure of 25MPa. More complete gasification is gained with the longer residence time. The feedstock with low biomass content is easier to gasify.