Facile Synthesis of Proton‐Type ZSM‐5 by Using Quasi‐Solid‐Phase (QSP) Method. Issue 39 (17th June 2020)

• Record Type: Journal Article
• Authors: Fan, Subing; Tuo, Jie; Wang, Dan; Rong, Jingya; Zhang, Jianli; Ma, Qingxiang; Gao, Xinhua; Yang, Guohui; Zhao, Tiansheng; Tsubaki, Noritatsu
• Is Part Of: Chemistry. Volume 26:Issue 39(2020)
• Page Start: 8532
• Page End: 8535
• Publication Date: 2020-06-17
• Subjects: crystallization kinetics -- crystallization mechanisms -- proton-type ZSM-5 -- quasi-solid-phase methods -- zeolites; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202002021
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Herein, a simple and green quasi‐solid‐phase (QSP) method for facile synthesis of proton‐type ZSM‐5 avoiding use of excessive water, dry gel, Na + cation and fluoride is reported. Crystallization by using the stoichiometric amount of TPAOH (tetrapropylammonium hydroxide) at 180 °C for only 12 h gave well‐structured HZSM‐5 crystals with high specific surface area of 429 m 2 g −1 and high thermal stability. 5MRs was observed to closely relate the formation of MFI structure and QSP method exhibits shorter induction period ( t 0 ), higher nucleation rate ( Vn ), and faster growth rate ( V g ). Moreover, HZ‐12–180 showed extremely better and rather stable catalytic activity for methanol‐to‐propylene reaction by comparison with commercial HZSM‐5. Abstract : A simple and green QSP method for facile synthesis of proton‐type ZSM‐5 that avoids excessive water, sol–gel process, ion‐exchange process, and wastewater discharging, is reported. This method is of fast growth, high efficiency, energy conservation, and environmentally friendly. Crystallization for only 12 h gave well‐structured HZSM‐5 with high S BET of 429 m 2 g −1 and significantly improved thermal stability (see scheme).