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Hierarchical Macro-meso-microporous ZSM-5 Zeolite Hollow Fibers With Highly Efficient Catalytic Cracking Capability

机译:具有高效催化裂化能力的分层大中微孔ZSM-5沸石中空纤维

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摘要

Zeolite fibers have attracted growing interest for a range of new applications because of their structural particularity while maintaining the intrinsic performances of the building blocks of zeolites. The fabrication of uniform zeolite fibers with tunable hierarchical porosity and further exploration of their catalytic potential are of great importance. Here, we present a versatile and facile method for the fabrication of hierarchical ZSM-5 zeolite fibers with macro-meso-microporosity by coaxial electrospinning. Due to the synergistic integration of the suitable acidity and the hierarchical porosity, high yield of propylene and excellent anti-coking stability were demonstrated on the as-prepared ZSM-5 hollow fibers in the catalytic cracking reaction of iso-butane. This work may also provide good model catalysts with uniform wall thickness and tunable porosity for studying a series of important catalytic reactions.
机译:沸石纤维由于其结构的特殊性,同时又保持了沸石结构单元的固有性能,因此在一系列新应用中引起了越来越多的兴趣。具有可调节的分级孔隙率的均匀沸石纤维的制备及其催化潜力的进一步探索是非常重要的。在这里,我们提出了一种通用且简便的方法,用于通过同轴静电纺丝制造具有大介孔-微孔结构的分级ZSM-5沸石纤维。由于适当的酸度和分级孔隙度的协同整合,在异丁烷的催化裂化反应中,所制备的ZSM-5中空纤维证明了丙烯的高收率和优异的抗结焦稳定性。这项工作还可能为研究一系列重要的催化反应提供具有均匀壁厚和可调孔隙率的良好模型催化剂。

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