Chemical Crosslinking Assembly of ZSM-5 Nanozeolites into Uniform and Hierarchically Porous Microparticles for High-Performance Acid Catalysis

• DOI: 10.1021/acsami.9b01681
• Publication Date: 2019-04-15T10:45:13Z
• Authors: Chao Shang; Zhangxiong Wu; Winston Duo Wu; Xiao Dong Chen
• Keywords: Particle (ecology); Suspension

Hierarchically porous zeolites combining the advantages of desirable mass transport nanozeolites and easy separation handling micro-zeolites are ideal candidates in catalytic applications. Facile routes for assembly zeolite microparticles with hierarchical porosity high mechanical strength much expected. Herein, based on a microfluidic jet spray drying technology, we report facile scalable chemical crosslinking strategy synthesis by directly using conventional as-synthesized nanozeolite suspension as precursor. This route not only avoids energy-intensive centrifugal process but also significantly increases uniformity microparticles. The soluble aluminosilicate species act stabilizer to improve droplet stability during then "cross-linker" chemically bind interconnect nanoparticles form robust bodies after calcination. Zeolite variable morphologies (spherical, bowl-like, dimpled) uniform controllable sizes (from 70 108 μm) can be obtained adjusting experimental parameters. particle formation mechanism is discussed from purified control. possess emerged mesopores (∼6 nm) well-maintained surface area, large pore volume, microporosity, strong acidity original nanozeolites. As result, they exhibit excellent acid performances acetolysis epichlorohydrin cracking low-density polyethylene, far better than those commercial ZSM-5.