نتایج جستجو برای: SAPO-11

تعداد نتایج: 386554  

Journal: :J. Comput. Meth. in Science and Engineering 2012
Beulah Griffe Joaquín L. Brito Anibal Sierraalta

Quantum chemistry calculations were done, using the ONIOM2 methodology at two different levels of calculation, B3LYP for the high level and UFF for the low level. These calculations were performed on Au3/SAPO-11, Au4/SAPO-11, CO-Au3/SAPO-11 and CO-Au4/SAPO-11 aggregates to analyze the geometries of small clusters of Au3 and Au4 on SAPO-11 support. Au3 cluster present a triangle structure in Au3...

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Journal: Iranian Journal of Chemistry and Chemical Engineering 2015
Liangfu Zhao Wei Zhang Xiaoxiao Wang,

Shape-selective methylation of naphthalene (NAPH) over SAPO-11 zeolite was carried out in a fixed-bed flow reactor under atmospheric pressure. Some zeolites, such as H-beta (Hβ), HUSY and ZSM-5 were also evaluated for comparison with SAPO-11 zeolite.The results showed that SAPO-11 exhibited higher stability, higher selectivity of  2,6-dimethylnaphthalene (2,6-DMN), and higher 2,6-/2,7-DMN r...

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Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
xiaoxiao wang wei zhang liangfu zhao

shape-selective methylation of naphthalene (naph) over sapo-11 zeolite was carried out in a fixed-bed flow reactor under atmospheric pressure. some zeolites, such as h-beta (hβ), husy and zsm-5 were also evaluated for comparison with sapo-11 zeolite.the results showed that sapo-11 exhibited higher stability, higher selectivity of  2,6-dimethylnaphthalene (2,6-dmn), and higher 2,6-/2,7-dmn ratio...

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Journal: :Chemcatchem 2023

The Front Cover illustrates an artwork design for showcasing the developed bifunctional NiRe/SAPO-11 catalyst along with “KHON”, masked dance drama in Thailand. In their Research Article, A. Srifa and co-workers designed Re nanoparticles decorated on Ni/SAPO-11 economically combined process of direct triglycerides hydro-deoxygenation isomerization into low-cold flow diesel. diesel production co...

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Journal: :Materials Research-ibero-american Journal of Materials 2023

Silicoaluminophosphates SAPO-5 and SAPO-11 were synthesized using the hydrothermal method, 170 ºC with triethylamine dipropylamine as structure directing agents, respectively. This work aimed incorporation of boron into structures obtained by modifying composition system, a reaction equation: Al2O3:P2O5:x SiO2: yB2O3:1,5TEA (or DPA):50H2O, x, y=0-0.2. The phase was identified XRD characterized ...

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Journal: :Brazilian Journal of Chemical Engineering 2017

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1388
نسرین رضائی زکی, معصومه خاتمیان, محمد حقیقی,

غربال های مولکولی آلومینوفسفات (alpos) که نوعی از مواد متخلخل می باشند و اولین بار در سال 1980 گزارش شدند، از به هم پیوستن واحدهای alo4 و po4 تشکیل شده اند. استخلاف si در داخل این شبکه ها منجر به غربال های مولکولی sapo می گردد. در اثر ورود برخی از فلزات مانند be, b, mg, fe, ni و ... به داخل شبکه های sapo ، غربال های مولکولی mapso-n حاصل می گردد. این فلزات در سایتهای al3+ در شبکه قرار میگیرند.در...

15 صفحه اول
Journal: :Chinese Journal of Catalysis 2021

Recent studies confirm that the emerging bifunctional catalysts consisting of metal oxide and zeolites can directly convert syngas into high-quality gasoline, however, formation mechanism iso-paraffins difference with conventional FT/zeolite catalyst have not been investigated. Herein, three one-dimensional SAPO diverse micropore sizes were synthesized assembled ZnAlOx spinel structure. It was ...

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Journal: :Journal of Applied Sciences 2007

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Journal: :Iraqi journal of chemical and petroleum engineering 2021

SAPO-11 is synthesized from silicoaluminophosphate in the presence of di-n-propylamine as a template. The results show that sample obtained has good crystallinity, 396m2/g BET surface area, and 0.35 cm3/g pore volume. hydroisomerization activity (0.25)Pt (1)Zr (0.5)W/SAPO-11 catalyst was determined using n-decane base oil. All experiments were achieved at fixed bed plug flow reactor temperature...

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