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Clean gasoline production and solar energy for CO2 conversion

来源:    发布时间:2017-10-13    点击次数:

Clean gasoline production and solar energy for CO2 conversion

报告人:王春玲 博士

报告时间:2017-10-13(周五)   13:30

报告地点:环境学院B207

 

Poor selectivity for gasoline products is a critical issue for the Fischer–Tropsch synthesis (FTS). It is a great challenge in catalysis to increase selectivity without sacrificing activity. We create a molecular tailor with inducing acidity polyoxometalates for the production of clean gasoline. Polyoxometalates (POMs) is a type of metal-oxide clusters with super strong acidities and tunable structures. A highly efficient bifunctional catalyst with introducing POMs into a conventional FTS catalyst leading to 118% increase in the selectivity of gasoline. It was found that such a significant improvement is due to the effective hydrocracking of heavier hydrocarbon products at POMs sites. Furthermore, we demonstrate a novel strategy to increase gasoline selectivity, namely, the 145% increase in selectivity of gasoline without sacrificing high CO conversion was obtained by tuning Al2O3 support with tungstophosphoric acid (HPW) for Ru-based catalysts. This finding offers a simple and novel approach to develop efficient catalysts for FTS.

With global warming concern, CO2 has been attracted dramatically increased interest. Although solar energy is clean and available in large excess, it is truly a great challenge to convert such stable CO2 molecules to chemicals using light by simulating the natural process with high flux conversion. We provide a high efficiency photocatalytic conversion of CO2 hydrogenation with maximum CO2 conversion to 247.8 mmolgcat1h1, which have finally realized high flux conversion. Those yields are 3 orders of magnitude larger than the current reported values of CO2 photo-hydrogenation reaction, which demonstrated it is a productive route for CO2 photoreduction and offers a distinctive method to photocatalytically active such stable CO2 molecules.

 

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