液相费托合成反应的选择性调控新策略

费托合成反应由于能够将来源于煤、天然气以及可再生的生物质的合成气在催化剂的作用下转化为清洁燃料和高值化学品，因而受到了学术界和工业界的广泛关注。对费托合成产物选择性进行调控，突破Anderson-Schulz-Flory分布规律的限制，是该反应的关键科学问题之一。本研究提出通过在低温液相费托合成反应体系中引进无机、有机修饰剂，利用修饰剂与费托合成反应中间体1-烯烃之间的作用，将合成气高选择性地一步转化为特定段碳氢产物。归纳修饰剂种类与费托合成反应产物选择性之间的关系，考察修饰剂对催化剂物理性质的影响，表征修饰剂与反应物、反应中间体的作用，阐明修饰剂改变选择性的作用机理，为灵活调控费托合成反应产物分布提供新颖有效且方便可行的全新策略。

Fischer-Tropsch synthesis (FTS) is essential for the transformation of coal, natural gas, and biomass to clean transportation fuels and value-added chemicals, so this reaction has attracted enormous interest academically and industrially. For this reaction, one of the key scientific issues is to break through the limitation of the classical Anderson-Schulz-Flory law imposed on the selectivities of the FTS products. In this proposal, a novel strategy is designed aiming at the manipulation of the selectivities of the FTS products by introducing inorganic or organic modifier to the reaction medium during the low-temperature liquid-phase FTS reaction. The product selectivities will be modulated by utilizing the interaction between the modifier and 1-olefin, the intermediate of the FTS reaction. In this way, highly selective one-step transformation of syngas to certain hydrocarbon fractions will be realized by proper optimzation of the reaction parameters. Correlation between the type of the modifier and the product selectivity will be made. The influence of the modifier on the characteristics of the FTS catalysts will be examined, and the interaction between the modifier and the reactants and reaction intermediate will be determined, which are instructive for the elucidation of the working mechanism of the modifier on selectivity manipulation. This work will offer a versatile and facile strategy for effectively tailoring the selectivities of the FTS products.