Effects of the different synthetic parameters on the crystallinity and crystal size of nanosized ZSM-5 zeolite

Abstract

Effects of the different synthetic parameters on the crystallinity and crystal size of nanosized ZSM-5 zeoliteAbstract: This review aims at investigating the effect of the different synthetic parameters on the crystallinity and crystal size of nanosized ZSM-5 zeolite. The influence of the different parameters, such as the material of the synthesis source, the material ratio to each other, crystallization time and temperature, aging time and temperature, microwave treatment, seeding, and sonication, on the size of the final product is studied and the reason for each phenomenon is explained.

Different techniques and their effective parameters in nano SAPO-34 synthesis: A review

“…There are various works which studied effects of crystallization time [32][33][34][35][36][37][38]. They confirm that with increasing crystallization period, crystals grow larger.…”

“…According to the literature, at very low crystallization time, only the amorphous phase is obtained. One of the impressive results of increasing crystallization time is improvement in the yield of SAPO-34 phase [32,33,35,38].…”

Zeotype SAPO‐34 Synthesized by Combination of Templates for the Gasification of Biomass

“…This could be due to the fact that silica already in the precursor may act as seeds, which could enhance the rate of crystallization. TEOS is in silane form with high reactivity, which leads to fast hydrolysis and thus results in a high rate of nucleation and crystallization , . On the other hand, colloidal silica is already in its hydrolyzed form when using LUDOX AS‐30; hence, the crystallization process could occur without hydrolysis of the silica source .…”

The synthesis of nano-sized ZSM-5 zeolite by dry gel conversion method and investigating the effects of experimental parameters by Taguchi experimental design

“…It is recognized that smaller particles of ZSM-5 zeolite are much more effective than large particles [5]. Higher resistance to coke poisoning, shorter diffusion paths and more active sites are important advantages of ZSM-5 with smaller size in catalytic reaction applications [6,7]. Therefore, CONTACT Rouein Halladj halladj@aut.ac.ir it would be interesting to develop a new approach for the synthesis of nano-sized ZSM-5 zeolite.…”

“…Several authors have investigated the factors affecting the formation of nano size zeolite crystals, such as the source of alkalinity, water content, temperature, and aging time. It has been revealed that these factors are critical on the size and uniformity of the final product [7,9,[15][16][17].…”