Integrated Catalytic Conversion of γ-Valerolactone to Liquid Alkenes for Transportation Fuels
Integrated Catalytic Conversion of γ-Valerolactone to Liquid Alkenes for Transportation Fuels
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DOI：
10.1126/science.1184362
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发表时间：
2010-02-26
期刊：
影响因子：
56.9
通讯作者：
Dumesic, James A.
中科院分区：
文献类型：
--
作者：
Bond, Jesse Q.;Alonso, David Martin;Dumesic, James A.
可再生燃料的有效合成仍然是一个具有挑战性和重要的研究方向。我们报告了一种策略，通过该策略，由生物质衍生的碳水化合物产生的γ-戊内酯（GVL）的水溶液可以通过不需要外部氢气源的集成催化系统转化为分子量范围适合于运输燃料的液体烯烃。GVL进料在升高的压力下经历脱羧（例如，例如，在一个实施例中，36巴），以产生由等摩尔量的丁烯和二氧化碳组成的气流。将该料流直接进料至含有酸催化剂（例如，例如，在一个实施例中，HZSM-5，Amberlyst-70），其偶联丁烯单体以形成具有可用于汽油和/或喷气燃料应用的分子量的可缩合烯烃。在升高的压力下的CO2的流出气流可以潜在地被捕获，然后被处理或隔离以减轻来自该过程的温室气体排放。
Efficient synthesis of renewable fuels remains a challenging and important line of research. We report a strategy by which aqueous solutions of gamma-valerolactone (GVL), produced from biomass-derived carbohydrates, can be converted to liquid alkenes in the molecular weight range appropriate for transportation fuels by an integrated catalytic system that does not require an external source of hydrogen. The GVL feed undergoes decarboxylation at elevated pressures (e. g., 36 bar) over a silica/alumina catalyst to produce a gas stream composed of equimolar amounts of butene and carbon dioxide. This stream is fed directly to an oligomerization reactor containing an acid catalyst (e. g., H ZSM-5, Amberlyst-70), which couples butene monomers to form condensable alkenes with molecular weights that can be targeted for gasoline and/or jet fuel applications. The effluent gaseous stream of CO2 at elevated pressure can potentially be captured and then treated or sequestered to mitigate greenhouse gas emissions from the process.