Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

Chen, Zhiping; Liu, Li; Shi, Faxiang; Zhou, Wenwu; Yang, Zhiyuan; Zhou, Anning

doi:10.1039/d1nj05456b

Cited by 4 publications

(3 citation statements)

References 45 publications

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“…Another important method to introduce hierarchically porous structure into SAPO-11 is the so-called templating synthesis. Besides carbon black and metal–organic framework, the long-chained molecules − were chosen as the templating agent to synthesize SAPO-11 molecular sieve, and the mesopore width can be modulated by varying their chain lengths . Unfortunately, their relatively high cost and unclear assembly behaviors at high temperatures limit their wide applications as mesoporogen.…”

Section: Introductionmentioning

confidence: 99%

“…Besides carbon black 25 and metal−organic framework, 26 the longchained molecules 27−29 were chosen as the templating agent to synthesize SAPO-11 molecular sieve, and the mesopore width can be modulated by varying their chain lengths. 29 Unfortunately, their relatively high cost and unclear assembly behaviors at high temperatures limit their wide applications as mesoporogen. Though some polymers have been employed as mesoporogen to synthesize hierarchical SAPO-11 materials, 30−33 to find more efficient templates is still tempting.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical SAPO-11 Molecular Sieves Prepared with the Presence of Designedly Phosphorylated Poly(Vinyl Alcohol)s

Wang,

Xue,

Sun

et al. 2024

Ind. Eng. Chem. Res.

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The purpose of this paper is to report an efficient templating synthesis of hierarchically porous SAPO-11 molecular sieves. Poly(vinyl alcohol) was phosphorylated to get different phosphorus contents, and those designedly modified polymers were employed as mesoporous template in the hydrothermal synthesis of SAPO-11. Consequently, the prepared hierarchical molecular sieves exhibited higher BET areas, regular mesopore structures, and better acidity than their conventional counterpart. The catalysts with SAPO-11s as support had improved catalytic conversion and selectivity in hydroisomerization of n-hexane. The templating mechanism of the designed mesoporogens as well as the effects of their phosphorus content on the properties of hierarchical SAPO-11 molecular sieves were well discussed. This work provides an effective approach to template intracrystal mesopores in hierarchical silicoaluminophosphate molecular sieves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical SAPO-11 Molecular Sieves Prepared with the Presence of Designedly Phosphorylated Poly(Vinyl Alcohol)s

Wang,

Xue,

Sun

et al. 2024

Ind. Eng. Chem. Res.

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“…Otherwise, straight naphtha often undergoes isomerization or hydro-isomerization catalytic reaction to increase the octane number and upgrade the quality of products [6][7][8]. Thermodynamically, this catalytic process is desired at low temperatures using an acid catalyst; however, it requires an especial catalyst type such as bifunctional catalyst at high temperatures ~500 • C [9][10][11][12][13][14][15]. This high temperature condition leads towards cracking reaction which acts to reduce the production of desired products [5,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Loaded Cobalt onto MCM-48 Mesoporous Catalyst as a Heterogeneous Reaction in a Fixed Bed Membrane Reactor to Produce Isomerization Product from n-Heptane

Ali

Salih²,

Harharah

et al. 2023

Catalysts

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The use of catalytic membranes as microstructured reactors without a separative function has proved effective. High catalytic activity is possible with minimal mass transport resistances if the reactant mixture is pushed to flow through the pores of a membrane that has been impregnated with catalyst. In this study, n-heptane (C7H16) was hydrocracked and hydro-isomerized within a plug-flow zeolitic catalytic membrane-packed bed reactor. The metallic cobalt (Co) precursor at 3 wt.% was loaded onto support mesoporous materials MCM-48 to synthesize heterogeneous catalysis. The prepared MCM-48 was characterized by utilizing characterization techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), Fourier transform infrared (FTIR), nitrogen adsorption–desorption isotherms, and the Brunauer–Emmett–Teller (BET) surface area. The structural and textural characteristics of MCM-48 after encapsulation with Co were also investigated. The analyses were performed before and after metal loading. According to the results, the 3 wt.% Co/MCM-48 of metallic catalyst in a fixed bed membrane reactor (MR) appears to have an excellent catalytic activity of ~83% during converting C7H16 at 400 °C, whereas a maximum selectivity was approximately ~65% at 325 °C. According to our findings, the synthesized catalyst exhibits an acceptable selectivity to isomers with multiple branches, while making low aromatic components. In addition, a good catalytic stability was noticed for this catalyst over the reaction. Use of 3 wt.% Co/MCM-48 catalyst led to the highest isomerization selectivity as well as n-heptane conversion. Therefore, the heterogeneous catalysis MCM-48 is a promising option/ alternative for traditional hydrocracking and hydro-isomerization processes.

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Synthesizing hierarchically porous SAPO-11 with polyvinyl alcohol phosphates as mesopore template: effects of phosphorus content and concentration of templates

Wang,

Liu,

Xue

et al. 2024

J Porous Mater

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Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

Abstract: A series of hierarchical SAPO-11 molecular sieve synthesized by mesoporogen with different alkyl chain length were prepared. The synthesized hierarchical SAPO-11 were characterized by XRD, SEM, N2 adsorption-desorption, TEM, NH3-TPD...

Cited by 4 publications

References 45 publications

Hierarchical SAPO-11 Molecular Sieves Prepared with the Presence of Designedly Phosphorylated Poly(Vinyl Alcohol)s

Hierarchical SAPO-11 Molecular Sieves Prepared with the Presence of Designedly Phosphorylated Poly(Vinyl Alcohol)s

Utilization of Loaded Cobalt onto MCM-48 Mesoporous Catalyst as a Heterogeneous Reaction in a Fixed Bed Membrane Reactor to Produce Isomerization Product from n-Heptane

Synthesizing hierarchically porous SAPO-11 with polyvinyl alcohol phosphates as mesopore template: effects of phosphorus content and concentration of templates

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