Abstract
This work aims to realize combined heat and power (CHP) system enhanced by chemical recuperation of the unused waste heat at around 300 degree C that is commonly found in many industries. This system can "upgrade" the unused waste heat to electric energy by endothermic reaction of DME steam reforming and can save the fuel consumption and reduce CO_2 emission. We successfully prepared the catalyst customized to this purpose. DME steam reforming is the sequential reaction which consists of DME hydrolysis and methanol decomposition or steam reforming, and a few research reported that solid acid promotes the former reaction. We experimented with several combinations of zeolite and γ-alumina for solid acid and CoFe-spinel, CuMnCrK, CuMn-spinel and LaPd/CeO_2 for the latter reactions. The test results showed that zeolite had higher activity for DME hydrolysis and LaPd/CeO_2 selectively produced CO by suppressing CO shift reaction at 300 degree C. The LHV of reformed gas increased by 8.7% compared to that of DME fuel.
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