Supercritical Water Gasification of Biomass: An Integrated Kinetic Model for the Prediction of Product Compounds (original) (raw)

2015, Industrial & Engineering Chemistry Research

With the shift in interest towards renewable energy, hydrogen as an alternative gaseous fuel seems to attract much attention. Waste biomass is an ideal option for the synthesis of biofuels due to its abundance and no net CO 2 emissions. Hydrogen can be produced through supercritical water gasifi cation of waste biomass. Hydrogen is an attractive energy carrier which can be used as a direct fuel or in fuel cells to generate electricity and in other energy-producing processes. Gasifi cation of biomass in supercritical water can be performed for hydrogen generation in both batch and continuous modes with/ without the application of catalysts. In spite of the progress made in various gasifi cation technologies, diamond anvil cells and fl uidized beds as the new-generation batch and continuous reactors, respectively, are not fully recognized. The current review is focused on understanding the design, application and limitations of these two new reactor confi gurations to help motivate their wide-scale utilization. The review also discusses the potential of diamond anvil cells in studying the involved chemical reactions, thermodynamics, and phase behavior of biomass components during gasifi cation. Nonetheless, the caliber of fl uidized beds in continuously gasifying biomass for hydrogen production in supercritical water is also documented.

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