Evaluation of gasification efficiency of glucose and sorbitol under hydrothermal reforming conditions in an autoclave batch reactor

Blom, M.J.W. (2015) Evaluation of gasification efficiency of glucose and sorbitol under hydrothermal reforming conditions in an autoclave batch reactor.

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Abstract:Gasification of biomass is an interesting method for converting biomass to calorific gas. Studies on glucose, a model component for biomass have shown that when this is attempted at temperatures below the critical temperature of water, char formation takes place. Other studies suggest that stabilisation of biomass by hydrogenation could prevent char formation. This report focuses on sorbitol, a model component for hydrogenated biomass, in combination with glucose. Non-catalytic conversion in a 45 ml autoclave batch reactor is described. It was found that sorbitol is stable up to at least 250 °C for at least 30 minutes. It was also found that at 350 °C destruction of sorbitol takes place and possible mechanisms are discussed. Reaction products were found to be various aqueous and oil. Dissolved organics in the aqueous phase were identified by extraction and GC-MS. Gaseous components were identified by Micro-GC. Dependences of sorbitol destruction, oil formation and gas production on residence time were researched. It was found that all increase with temperature. Char formation for glucose experiments was found to be dependent on temperature and glucose/sorbitol fraction and residence time. Char formation increases with temperature and residence time, and shows disputable results for glucose/sorbitol fraction.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:35 chemistry
Programme:Chemical Engineering BSc (56960)
Link to this item:http://purl.utwente.nl/essays/68764
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