Jump to main content
Jump to site search

Issue 10, 2017
Previous Article Next Article

Vapor-phase transport synthesis of microfibrous-structured SS-fiber@ZSM-5 catalyst with improved selectivity and stability for methanol-to-propylene

Author affiliations

Abstract

A microstructured SS-fiber@ZSM-5 core–shell catalyst engineered from micro- to macro-scale in one step is developed through a cost-effective and high-efficiency vapor-phase transport (VPT) synthesis. A sinter-locked three-dimensional microfibrous-structure consisting of 15 vol% stainless steel fibers (SS-fiber, 20 μm dia.) was dip-coated with a synthesis gel containing silicalite-1 and subsequently steamed at 180 °C using ethylenediamine (EDA) solution. The as-synthesized ZSM-5 shell contains fine coffin-shaped crystals and small grains with remarkable intercrystalline mesopores derived from the initial aggregated aluminosilicate particles while the mesopore size is ever-changing with the progression of the crystallization. The catalyst lifetime for the MTP reaction shows a volcano-like evolution against the VPT time length, which correlates well with the crystallization-time-dependent amount of Brønsted acid and mesoporosity. The most promising SS-fiber@HZSM-5 catalyst is the one obtained via VPT synthesis for 120 h, with a high shell diffusion coefficient of 1.6 × 10−14 m2 s−1, delivering a prolonged single-run lifetime of 45 h with a high propylene selectivity of ∼46.9% at 450 °C at a high methanol weight hourly space velocity (WHSV) of 10 h−1.

Graphical abstract: Vapor-phase transport synthesis of microfibrous-structured SS-fiber@ZSM-5 catalyst with improved selectivity and stability for methanol-to-propylene

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 15 Feb 2017, accepted on 20 Apr 2017 and first published on 20 Apr 2017


Article type: Paper
DOI: 10.1039/C7CY00283A
Citation: Catal. Sci. Technol., 2017,7, 2087-2100
  •   Request permissions

    Vapor-phase transport synthesis of microfibrous-structured SS-fiber@ZSM-5 catalyst with improved selectivity and stability for methanol-to-propylene

    J. Ding, S. Fan, P. Chen, T. Deng, Y. Liu and Y. Lu, Catal. Sci. Technol., 2017, 7, 2087
    DOI: 10.1039/C7CY00283A

Search articles by author