Seed-assisted synthesis of SAPO-34 zeolites: Genetic effect of seeds
نویسندگان
چکیده
• Seed-assisted synthesis of four SAPO-34 by using different seeds. Physicochemical properties seed and the seed-derived were investigated. Seed showed obvious genetic effect on in terms texture acidity. In-situ transformation seeds resulted their effect. In past decades, seed-assisted zeolites has become one research focuses. Understanding derived products, thus tuning physicochemical those products selecting suitable is pivotal for synthesizing via method. this work, kinds with synthesized used as to prepare corresponding The characterized XRD, SEM, N 2 adsorption-desorption, NH 3 -TPD, 29 Si MAS NMR techniques. results that particle size, textural acidity properties, silicon coordination are strongly correlated seeds, exhibiting effects. By investigating crystallization kinetics, we speculated effects should be attributed incomplete dissolution During process, incompletely dissolved fragments directly incorporated into product serve models. These models then require final grow according patterns, retaining inheriting original characteristics.
منابع مشابه
Synthesis of SAPO-34 catalysts via controlled crystal growth
Introduction SAPO-34 is a silicoaluminophosphate zeolite with 8-membered ring windows (~0.38nm) displaying chabazite structure. SAPO-34 is an efficient catalyst showing improved catalytic performance in reactions such as methanol conversion to olefins [1], oxidative dehydrogenation of propane [2], conversion of light alkenes [3]. Its catalytic properties are mainly attributed to its mild acidit...
متن کاملeffect 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...
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...
متن کاملEffect of Crystallization Temperature on the Synthesis of SAPO-34 and its Catalytic Performance in MTO Reaction
متن کامل
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 sem techniques ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of The Taiwan Institute of Chemical Engineers
سال: 2022
ISSN: ['1876-1070', '1876-1089']
DOI: https://doi.org/10.1016/j.jtice.2022.104211