Application of D-optimal experimental design in nano-sized ZSM-5 synthesis for obtaining higher crystallinity

作者：Solt****i Saeed; Halladj Rouein^*; Rashidi Alimorad; Bazmi Mansour

来源：CRYSTAL RESEARCH AND TECHNOLOGY, 2014, 49(6): 366-375.

DOI：10.1002/crat.201300434

• ZSM-5
• experimental design
• Fischer test
• crystallinity
• optimization

D-optimal experimental design with three levels of SiO2/Al2O3, template/SiO2, H2O/SiO2, SiO2/Na2O and TPABr/TPAOH ratio parameters was used to optimize the experimental parameters by the analysis of variance (ANOVA). The effects of above mentioned ratios in the initial synthetic mixture on the crystallinity of the ZSM-5 zeolite were studied. The synthesized samples were characterized by XRD, FE-SEM, and TEM analysis. Fischer test results showed that SiO2/Al2O3 and H2O/SiO2 molar ratios are the most and least effective parameters, respectively, in the range studied. The most important two-way interaction variable was that of template/SiO2 and Na2O/SiO2 molar ratios. The optimum composition of the gel compound to achieve relative maximum crystallinity is SiO2/Al2O3 = 99.96, template/SiO2 = 0.16, H2O/SiO2 = 34.68, Na2O/SiO2 = 0.02 and TPABr/TPAOH = 1.44.

• 出版日期2014-6