Synthesis, characterization, and catalytic application of mesoporous SAPO-34 (MESO-SAPO-34) molecular sieves

Singh, Arvind; Yadav, Rekha; Sakthivel, Ayyamperumal

doi:10.1016/j.micromeso.2013.07.031

Cited by 57 publications

(49 citation statements)

References 86 publications

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“…A comparable conversion of phenol of about 23% was evident on Meso-SAPO-34, which was found to be better than on mesoporous Al-MCM-41 and microporous SAPO-34 materials (Table 4) [67]. The presence of strong acidic sites along with the mesoporous channels present on the Meso-SAPO-34 yield better conversion and the desired 1-phenoxy-2-propanol selectivity (80%).…”

Section: Meso/microcomposite Of Aluminophosphate-based Materials As Pmentioning

confidence: 85%

“…The first stable X-ray mesoporous silicoaluminophosphate was assembled from a microporous SAPO-34 precursor using a multistep method by Sakthivel et al [67] and was utilized for the liquid phase synthesis of phenoxy propanol using phenol and propylene oxide. A comparable conversion of phenol of about 23% was evident on Meso-SAPO-34, which was found to be better than on mesoporous Al-MCM-41 and microporous SAPO-34 materials (Table 4) [67].…”

Section: Meso/microcomposite Of Aluminophosphate-based Materials As Pmentioning

confidence: 99%

See 1 more Smart Citation

Role of Meso/Microporous Molecular Sieve Composite Materials on Various Catalytic Transformations

Sakthivel

Singh

2015

Sustainable Catalytic Processes

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Section: Meso/microcomposite Of Aluminophosphate-based Materials As Pmentioning

confidence: 85%

Section: Meso/microcomposite Of Aluminophosphate-based Materials As Pmentioning

confidence: 99%

Role of Meso/Microporous Molecular Sieve Composite Materials on Various Catalytic Transformations

Sakthivel

Singh

2015

Sustainable Catalytic Processes

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“…The intrinsic properties of materials can be tailored by surface modification; for example, the acidity of BEA zeolite can be controlled using alkali ion‐exchange treatment, and after modification it showed improved catalytic activity in the production of isobutylene from acetone . Moreover, hierarchical SAPO‐5, SAPO‐34, ZSM‐5, ZSM‐48, MCM‐22, Zn‐SAPO‐34, and H‐β zeolite type of materials were prepared using different alkali treatment through post‐synthesis route and their catalytic performance was found to be better than that of as made zeolites . Verboekend et al reported synthesis of hierarchical silicoaluminophosphate by using different acid and base treatments and their catalytic application in model alkylation reaction of benzyl alcohol with toluene .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hierarchical SAPO‐5 & SAPO‐34 Materials by Post‐Synthetic Alkali Treatment and Their Enhanced Catalytic Activity in Transesterification

Jadav

Bandyopadhyay

2020

Eur J Inorg Chem

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SAPO‐5 and SAPO‐34 materials were modified using post‐synthetic alkali treatment, which results in the formation of hierarchical SAPO‐5 and SAPO‐34 materials. To test the generation of mesoporosity, the modified materials were thoroughly characterized using XRD, FE‐SEM, TGA, ICP‐OES, and N2 adsorption/desorption techniques. Alkali treated SAPO‐5 and SAPO‐34 materials were utilized for the model reaction triacetin transesterification, under optimized conditions by varying the catalyst amount and reaction time: 90 % triacetin conversion with 66 % methyl acetate yield was achieved using modified SAPO‐5 catalyst, whereas 68 % triacetin conversion with 37 % methyl acetate yield was achieved using modified SAPO‐34 catalyst. The alkali treated SAPO‐5 catalyst was stable up to the 4th cycle.

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“…Therefore, its application prospect and future development in modern petrochemical industry are restrained greatly [16], especially for the conversion of large molecules as those encountered in heavy crude oil catalytic cracking process [17,18]. In order to overcome limitations of single microporous or mesoporous molecular sieves and to make preponderance complementarity between the two type molecular sieves, some research groups had extended new synthesis strategy to prepare mesoporous SAPO [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Catalytic cracking of 1, 3, 5-triisopropylbenzene over silicoaluminophosphate with hierarchical pore structure

Jin

Zhao

et al. 2015

J Porous Mater

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In order to prepare a highly active catalyst for the catalytic cracking of larger molecules, a novel micromesoporous silicoaluminophosphate composite (define as mesoporous SAPO-5) with hierarchical tri-modal pore size distributions has been firstly synthesized via post-synthetic method in acidic condition and subsequently characterized. Morphology control of the composite is attempted by adjusting pH value of the synthetic system. Three different morphologies of composite, including sphere-, rod-and net-like, are obtained in the different conditions. Possible mechanism for the formation of mesoporous SAPO-5 has been proposed. The mesoporous SAPO-5 exhibits higher cracking activity than conventional microporous SAPO-5 for cracking of 1, 3, 5-triisopropylbenzene (1, 3, 5-TIPB) under the same reaction conditions. The result indicates that the mesoporous SAPO-5 with hierarchical pore structure is favorable for catalytic cracking of large molecule. When the cumene as the reaction molecule, the microporous SAPO-5 catalyst exhibits higher conversion in catalytic cracking of cumene compared to the mesoporous SAPO-5, and the result may be attributed to that microporous SAPO-5 has much stronger acidity and specific selectivity than mesoporous SAPO-5 catalyst in catalytic cracking of cumene. Meanwhile, corresponding carbenium ion mechanism can account for the products formed during the whole reaction process.

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Synthesis, characterization, and catalytic application of mesoporous SAPO-34 (MESO-SAPO-34) molecular sieves

Cited by 57 publications

References 86 publications

Role of Meso/Microporous Molecular Sieve Composite Materials on Various Catalytic Transformations

Role of Meso/Microporous Molecular Sieve Composite Materials on Various Catalytic Transformations

Synthesis of Hierarchical SAPO‐5 & SAPO‐34 Materials by Post‐Synthetic Alkali Treatment and Their Enhanced Catalytic Activity in Transesterification

Catalytic cracking of 1, 3, 5-triisopropylbenzene over silicoaluminophosphate with hierarchical pore structure

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