碳化铁物相的定向制备及其在费托合成反应中本征催化性能

本申请围绕铁基催化剂在费托合成反应中碳化铁类型与催化性能之间的构效关系这一有待澄清的核心科学问题，通过系统调变纳米金属铁粒子的活化参数，考察其碳化铁种类及含量的演变，构建活化参数与物相组成之间明确的联系，实现各种碳化铁物相的精准碳化。通过在低温液相费托合成反应条件下评价催化性能，结合表面化学研究，阐明各种碳化铁对活性、产物类型、产物分布的影响规律，为理性设计合成气高效转化铁基催化剂提供依据，促进碳基非石油资源高效、清洁转化利用领域的技术进步。

The structure-performance relationship regarding the phase-defined iron carbides and the activity and selectivity of the iron-based catalysts is one of the unsolved, key scientific issues in the field of Fischer-Tropsch synthesis (FTS). In this proposal, we design a systematically study on the influences of the carburization variables of the iron-based catalysts on the types and contents of iron carbides formed. We aim at the targeted carburization of the iron-based catalysts by constructing a comprehensive and clear correlation between the carburization variables and the phase compositions. The catalytic performances of the iron carbides will be evaluated under liquid-phase low-temperature FTS reaction conditions, focusing on the elucidation of the inherent connections of the phase compositions of the catalysts with their catalytic activities and the kinds and distributions of the FTS products. This study will afford a solid basis for the rational design of high-performance iron-based catalysts for syngas conversion and will promote the technological advances in the transformation and utilization of non-petroleum carbon resources in a more efficient and cleaner manner.