doi:10.16597/j.cnki.issn.1002-154x.2026.01.001
氟辅助合成Co@MFI催化剂对丙烷脱氢性能的影响
姚森元 胥月兵∗ 刘冰 刘小浩
（江南大学化学与材料工程学院，无锡 214122）
摘 要本研究针对钴基催化剂在丙烷无氧脱氢应用中存在的技术瓶颈---钴物种低温下活性受限，创新性地采用氟化铵作为结构导向剂，通过原位水热合成法成功制备了具有纳米片层结构的Co@ MFI 分子筛催化剂。性能测试证实，氟辅助合成法可使催化剂对丙烷的转化率提升至接近热力学平衡值，丙烯选择性维持在95%以上。综合运用多种现代表征手段，发现氟元素的引入不仅调控了催化剂形貌，而且改善了Co 物种与载体的相互作用，增强了催化剂对丙烷中C-H 键的活化能力，提高了催化剂的低温活性。该研究不仅阐明了氟辅助合成对活性位构筑的调控机制，还为开发兼具高活性与高稳定性的非贵金属丙烷脱氢催化剂提供了新的设计思路。
关键词氟；丙烷脱氢；沸石；钴活性物种
The Effect of Fluorine-assisted Synthesis of Co@MFI Catalyst on Propane Dehydrogenation
YAO Senyuan XU Yuebing∗ LIU Bing LIU Xiaohao
(School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China)
Abstract Aiming at the technical bottleneck that the activity of cobalt species is limited at low temperatures in the application of cobalt-based catalysts for propane anaerobic dehydrogenation, ammonium fluoride was innovatively used as the structure-directing agent, and Co@MFI molecular sieve catalysts with nanosheet structure were successfully prepared via in-situ hydrothermal synthesis. The performance tests verify that the propane conversion over the catalyst synthesized by fluorine-assisted method is close to the thermodynamic equilibrium value, and the propylene selectivity remains above 95%. A variety of modern characterization methods were adopted. The results show that the introduction of fluorine not only regulates the catalyst morphology, but also improves the interaction between Co species and the support, enhances the ability to activate C-H bonds in propane, and boosts the low-temperature activity of the catalyst. This study clarifies the regulation mechanism of fluorine-assisted synthesis on the construction of active sites, and provides a new design strategy for developing non-noble metal propane dehydrogenation catalysts with high activity and high stability.
Keywords fluorine; propane dehydrogenation; zeolite; cobalt active species