A triple template of P123/SDS/CS with simultaneously enhanced utilization efficiency of P123 and crystal seeds

Liu, Hongtao; Xu, Yajuan; Wang, Jiujiang; Wang, Baojie; Mi, Xiaotong; Liu, Honghai; Han, Yueming; Gao, Xionghou; Chen, Xu; Li, Jiang

doi:10.1016/j.jallcom.2018.06.254

Cited by 4 publications

(5 citation statements)

References 27 publications

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“…As a direct consequence of this process, silica condensation will be improved greatly and the mesostructure with well-ordering will be obtained . This mechanism is totally different from that of our previous investigation …”

Section: Resultsmentioning

confidence: 99%

“…A series of mesoporous aluminosilicates (MAs) with good hydrothermal stability have been prepared by self-assembly of basic characteristic structure units of microporous zeolite Y by our group. − Much attention has been focused on these materials obtained by this novel strategy because of their distinct textural structures and their potential application in heavy oil catalytic cracking . As we know, active micelles are prerequisite for the assembly of aluminosilicate raw materials. , On the other hand, active micelles will exist only in low concentration of P123 solution, leading to the low utilization efficiency of both organic template and water .…”

Section: Introductionmentioning

confidence: 99%

“…33 This mechanism is totally different from that of our previous investigation. 1 Wang's study 34 showed that the thickness of the pore wall could be improved through the introduction of PVA. From Tables 1 and 2, it can be shown that (100) interplanar spacing, mesopore diameter, surface area, and pore diameter of the samples have a similar trend, which increases and then decreases.…”

Section: ■ Introductionmentioning

confidence: 99%

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Obtaining of Mesoporous Aluminosilicates with High Hydrothermal Stability by Composite Organic Templates: Utility and Mechanism

Liu

Zhang

et al. 2021

Langmuir

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We have reported the synthesis of mesoporous aluminosilicates (MAs) with high hydrothermal stability via assembly of basic characteristic structure units of typical microporous zeolite Y. In spite of this, high consumption of organic template and H 2 O remains a major obstacle to its industrial application. Herein, a facile and effective strategy called "composite templates" was employed to decrease significantly the amount of P123 and H 2 O. In this method, composite micelles of P123/ poly(vinyl alcohol) (PVA) could be more easily dispersed in the solution due to the lowering of water's surface tension caused by the free hydroxyl groups of PVA. Moreover, the improved assembly ability of composite micelles in high concentration solution leads to the synthesis of hydrothermally stable MAs with 45% decrease of organic template P123 and 81% that of water amount. It was found that by the introduction of composite templates, the textural properties such as the surface area of materials, volume of pore, size of pore, and thickness were enlarged simultaneously. Meanwhile, this article presented an understanding into the assembly of composite micelles in the process of synthesis of MAs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Obtaining of Mesoporous Aluminosilicates with High Hydrothermal Stability by Composite Organic Templates: Utility and Mechanism

Liu

Zhang

et al. 2021

Langmuir

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“…MAs have been attracting intense research interest due to their large pores and high surface area. − Improving hydrothermal stability is crucial for their practical applications but challenging in the industrial process. To settle this issue, the author’s group obtained hydrothermally stable MAs via the self-assembly of zeolite Y precursors. − However, a means to synthesize MAs with hydrothermal stability with decreased consumption amounts of organic surfactants and water is still a challenging goal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Aluminosilicates with Decreased Dosage of Organic Template and Water: Insights into the HLB Effect of the Cotemplate

Gao

et al. 2022

Ind. Eng. Chem. Res.

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Mesoporous aluminosilicates (MAs) with high hydrothermal stability had been synthesized via assembly of typical microporous zeolite Y precursors. However, the high consumption amount of the P123 template and water is still an obstacle to its industrial application. Synthesis of hydrothermally stable mesoporous aluminosilicates (MAs) in a high-concentration-template solution is a promising strategy to decrease the consumption amount of organic template and water. A means to prevent the clumping of micelles in the high-concentration system is of vital importance in the synthesis of MAs. In the present investigation, the goal was achieved by the introduction of a cotemplate with a high hydrophilic−lipophilic balance (HLB) value into F68 micelles. The effect of a cotemplate with different HLBs on the physicochemical properties of MA products was investigated. Compared with cotemplate sodium dodecyl dimethylbenzene sulfonate (SDMBS) of HLB 9.7 and fatty alcohol polyoxyethylene ether-9 (AEO-9) of HLB 13.5, octyl phenol polyoxyethylene ether-10 (OP-10) of HLB 14.1 favored the formation of well-crystallized MAs with maximum integrated intensity, surface area, and hydrothermal stability. The improvement of physicochemical properties could be attributed to the increase in overall hydrophilicity of composite micelles. As a result of this, well-ordered MAs were obtained with greatly decreased consumption of F68 and water.

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“…MAs, as the most promising candidates for catalytic cracking of large molecules, have aroused extensive attention due to their large surface area and ordered mesopores. − However, poor hydrothermal stability resulting from the amorphous wall of mesophase impedes their practical application. , Assembly of primary and secondary building units of zeolite Y has been found to be an effective route for improving the hydrothermal stability of MAs . For instance, our group has obtained MAs with excellent hydrothermal stability via the introduction of zeolite Y precursors into the walls of mesophase. ,− With a 33% retaining ratio of surface area after the hydrothermal treatment in 100% water vapor at 800 °C for 15 h, this mesoporous material exhibits hydrothermal stability comparable to that of USY . Despite the large potential, a large amount of P123 (pluronic triblock copolymers of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide), PEO-PPO-PEO) assumption (1.92 g of P123 was required for per gram of MAs product) is still a key problem for its industrial application.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Polypropylene Glycol Integration into the Micelles: A General Approach for High Utilization Efficiency of Organic Template

Cui

Zhen

Liu

et al. 2021

Ind. Eng. Chem. Res.

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Obtaining hydrothermally stable mesoporous aluminosilicates (MAs) by assembly of zeolite Y precursors is promising for catalytic cracking of heavy oil molecules, but current technology suffers from a large assumption of organic template P123. To solve these issues, a novel twodimensional micelle system is employed that is realized by the integration and separation hydrophobic PPG with P123 micelles. As compared with the conventional synthetic procedure, well-ordered mesophase could be obtained with only 44% amount of organic template P123. This hydrophobic polymer route builts up a general approach for developing hydrothermally stable MAs with high efficiency and low cost.

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A triple template of P123/SDS/CS with simultaneously enhanced utilization efficiency of P123 and crystal seeds

Cited by 4 publications

References 27 publications

Obtaining of Mesoporous Aluminosilicates with High Hydrothermal Stability by Composite Organic Templates: Utility and Mechanism

Obtaining of Mesoporous Aluminosilicates with High Hydrothermal Stability by Composite Organic Templates: Utility and Mechanism

Preparation of Mesoporous Aluminosilicates with Decreased Dosage of Organic Template and Water: Insights into the HLB Effect of the Cotemplate

Hydrophobic Polypropylene Glycol Integration into the Micelles: A General Approach for High Utilization Efficiency of Organic Template

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