Pomace Gasification In Supercritical Water For Hydrogen-rich Gas

Hydrogen can be used as the substitute for of the future energy because of its highcalorific value, small density, easy to storage and transportation and non-polluting aftersurplus. Water is a renewable resource, use water to produce hydrogen is a renewable,sustainable conversion process. In recent years, the demand for the juice of people isincrease, lead to the abandoned of pomace grow in number, not only a waste ofresources, but also pollutes the environment. The content of carbon, hydrogen, fixedcarbon and volatile matter of the pomace is very high, to be fuel is potential.Supercritical water has particular characteristics, can direct gasificat the biomass withhigh moisture content such as pomace, without the need for drying. Handling pomacein this way has high economic and environmental benefits.In this paper, build a pomace gasification in supercritical water model under theoperating environment of ASPENPLUS software. In this model, set the RYEILDdecomposition module to solve the problem of no unconventional material property.After the model is given to verify, we research the effect of the different operatingparameters (vaporization temperature, vapor pressure, total flow rate, the concentrationof the catalyst) to the product composition, the production amount of hydrogen, therate of gasification, the gas heat value. We also use the sensitivity analysis capabilitiesof ASPENPLUS software to detect the impact of changes in operating parameters tothe gas product. Draw a conclusion: n the case of not adding the catalyst, the mostinfluential factor on supercritical water gasification process is the temperature, thehigher temperater, the higher rate of hydrogen; concentration and pressure is followed by, while the effect of the flow is the minimum. Adding catalyst also has a greatereffect on hydrogen production rate, with the amount of catalyst increase, the hydrogenyield is increased significantly.In this paper, use pomace as raw materials, simulation and analysis its gasificationprocess in supercritical water. Built a reasonable supercritical water gasification model,finding out the influential factors, has guiding significance for supercritical watergasification technology to become mature and commercialization.