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A New Practical Route to ZSM‐5 Nanoparticles and Optimization of Synthetic Parameters through D‐optimal Design of Experiments
Author(s) -
Soltanali Saeed,
Halladj Rouein,
Rashidi Alimorad,
Bazmi Mansour,
Khodabakhshi Saeed
Publication year - 2015
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500267
Subject(s) - zeolite , chemistry , nanoparticle , molar ratio , particle size , range (aeronautics) , yield (engineering) , chemical engineering , analytical chemistry (journal) , nuclear chemistry , nanotechnology , chromatography , materials science , composite material , catalysis , organic chemistry , engineering
A D‐optimal experimental design with three levels of SiO 2 /Al 2 O 3 , template/SiO 2 , H 2 O/SiO 2 , Na 2 O/SiO 2 and TPABr/TPAOH ratio parameters has been used to optimize the experimental parameters by an analysis of variances (ANOVA). The effects of these ratios in the initial synthetic mixture on the size of the ZSM‐5 zeolite nanoparticles have been studied. XRD and FE‐SEM analyses were used to characterize synthetic samples. Fischer test results showed that H 2 O/SiO 2 and TPABr/TPAOH ratios are the most and least effective parameters, respectively, in the range studied. The most important two‐way interaction variables were the interaction of template/SiO 2 and TPABr/TPAOH molar ratios. The average particle size was in the 34–79 nm range. Furthermore, a mathematical model for the synthesis of ZSM‐5 zeolite nanoparticles was derived using experimental results. The optimized gel composition is as follows: SiO 2 /Al 2 O 3= 91.20, template/SiO 2= 0.16, H 2 O/SiO 2= 40.42, Na 2 O/SiO 2= 0.0147 and TPABr/TPAOH=0.