effect of synthesis parameters on phase purity, crystallinity and particle size of sapo-34

Authors

peyman emrani

shohreh fatemi

siamak ashraf talesh

abstract

an account is presented on investigation of the effects of synthesis parameters, i.e., reaction sources, silica to alumina ratio, acid molar ratio and crystallization conditions on the crystallinity, morphology and particle size of sapo-34. the synthesis conditions were designed to produce small particles with narrow size range. the prepared samples were characterized by xrd and sem techniques in order to evaluate the crystallinity, morphology and particle size. the xrd pattern was used to evaluate the crystallinity and phase purity. the phase purity of some samples, including sapo-18 was determined by diffax analysis from xrd data. the results were shown that formation of sapo-18 is enhanced by increasing the acid content in the primary mixture.lower si/al ratio in a primary mixture resulted in production of alpo’s and sapo-5 impurities.the type of template, silicon and aluminum source, acid concentration, agitation during crystallization, temperature and time of crystallization were found out as the significant parameters for controlling crystallinity and purity, particle size and morphology of the product.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Effect of Synthesis Parameters on Phase Purity, Crystallinity and Particle Size of SAPO-34

An account is presented on investigation of the effects of synthesis parameters, i.e., reaction sources, silica to alumina ratio, acid molar ratio and crystallization conditions on the crystallinity, morphology and particle size of SAPO-34. The synthesis conditions were designed to produce small particles with narrow size range. The prepared samples were characterized by XRD and SE...

full text

Synthesis of zeolite NaA nano-crystalls; effect of synthesis parameters on crystallinity and crystal size

Abstract In this work hydrothermal synthesis of zeolite NaA crystals with a composition of Al2O3:aSiO2:bNa2O:cH2O was investigated. Effects of SiO2/Al2O3, Na2O/Al2O3 and H2O/Al2O3 ratios and crystallization temperature and time were studied on crystallinity and crystal size of zeolite NaA crystals. It was tried to understand the interactions between these parameters. The crystal species o...

full text

Optimizing the crystallinity and acidity of H-SAPO-34 by fluoride for synthesizing Cu/SAPO-34 NH3-SCR catalyst.

A series of H-SAPO-34 zeolites were synthesized by a hydrothermal method in fluoride media. The as-synthesized H-SAPO-34 zeolites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 physisorption, temperature-programmed desorption of NH3 (NH3-TPD) and nuclear magnetic resonance (NMR) measurements. The results showed that a certain concentration of F(-) anions p...

full text

effect of seed priming and irrigation regimes on yield,yield components and quality of safflowers cultivars

این مطالعه در سال 1386-87 در آزمایشگاه و مزرعه پژوهشی دانشگاه صنعتی اصفهان به منظور تعیین مناسب ترین تیمار بذری و ارزیابی اثر پرایمینگ بر روی سه رقم گلرنگ تحت سه رژیم آبیاری انجام گرفت. برخی از مطالعات اثرات سودمند پرایمینگ بذر را بر روی گیاهان مختلف بررسی کرده اند اما در حال حاضر اطلاعات کمی در مورد خصوصیات مربوط به جوانه زنی، مراحل نموی، عملکرد و خصوصیات کمی و کیفی بذور تیمار شده ژنوتیپ های م...

My Resources

Save resource for easier access later


Journal title:
iranian journal of chemistry and chemical engineering (ijcce)

Publisher: iranian institute of research and development in chemical industries (irdci)-acecr

ISSN 1021-9986

volume 30

issue 4 2011

Keywords
[ ' s a p o ' , 3 4 , ' c r y s t a l l i n i t y ' , ' s y n t h e s i s p a r a m e t e r ' , ' p a r t i c l e s i z e ' ]

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023