Hydrothermally stable mesoporous aluminosilicates with moderate acidity via degradation-assembly process and improved catalytic properties

Liu, Hongtao; Zhao, Xiaozheng; Chen, Pinge; Gao, Xionghou; Liu, Honghai; Cao, Li; Chen, Xu; Tan, Qingfeng

doi:10.1007/s10934-014-9783-x

Cited by 12 publications

(28 citation statements)

References 18 publications

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“…The La-form samples of La-MZA-zero, La-MQW-0, and La-MQW-2.0 were obtained by the technology of ion exchange and immersion from MZA-zero, MQW-0, and MQW-2.0 using the solution of La(NO 3 ) 3 and a subsequent calcination for 2 h (550 °C) according to the literature …”

Section: Experimental Sectionmentioning

confidence: 99%

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: Experimental Sectionmentioning

confidence: 99%

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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“…[6][7][8] For example, the authors of the present investigation have prepared hydrothermally stable mesophase by assembling Beta and Y precursors with P123. [9][10][11][12][13] Unfortunately, macropores are still absent in these materials, and so forth, which limit their practical application. Therefore, one effective solution to this problem is to develop a novel preparation strategy for the immobilization of macropores into the meso-microporous materials.…”

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Hydrothermally stable macro-meso-microporous materials: synthesis and application in heavy oil cracking

et al. 2014

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“…[1][2][3][4] For example, the authors of the present investigation have obtained MA with excellent hydrothermal stability by assembling of zeolite Y precursors into the walls of MA. [8][9][10] Two critical problems should be addressed for the practical application of such materials: one is the high synthesis cost due to the loss of large amount of P123 remaining in the mother liquors (utilization of P123 is 1.88 g per g MA), and the other is the discharge of a large amount of waste in the synthesis of MA (86 g waste water was discharged per g MA). [8][9][10] Two critical problems should be addressed for the practical application of such materials: one is the high synthesis cost due to the loss of large amount of P123 remaining in the mother liquors (utilization of P123 is 1.88 g per g MA), and the other is the discharge of a large amount of waste in the synthesis of MA (86 g waste water was discharged per g MA).…”

mentioning

confidence: 99%

“…[1][2][3][4] For example, the authors of the present investigation have obtained MA with excellent hydrothermal stability by assembling of zeolite Y precursors into the walls of MA. [5][6][7][8][9][10] Such materials are expected to be capable of enduring the severe operations encountered in heavy oil FCC. [8][9][10] Two critical problems should be addressed for the practical application of such materials: one is the high synthesis cost due to the loss of large amount of P123 remaining in the mother liquors (utilization of P123 is 1.88 g per g MA), and the other is the discharge of a large amount of waste in the synthesis of MA (86 g waste water was discharged per g MA).…”

mentioning

confidence: 99%

“…[5][6][7][8][9][10] Such materials are expected to be capable of enduring the severe operations encountered in heavy oil FCC. [8][9][10] Two critical problems should be addressed for the practical application of such materials: one is the high synthesis cost due to the loss of large amount of P123 remaining in the mother liquors (utilization of P123 is 1.88 g per g MA), and the other is the discharge of a large amount of waste in the synthesis of MA (86 g waste water was discharged per g MA). Therefore, the design of an advanced process for the synthesis of MA with low cost and low waste water discharge remains a challenging goal.…”

mentioning

confidence: 99%

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A multiple-assembly/one-pot-crystallization strategy for a relatively more eco-friendly synthesis of hydrothermally stable mesoporous aluminosilicates

Cao

Jin

et al. 2014

RSC Adv.

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Mesoporous aluminosilicates (MA) with high hydrothermal stability obtained by assembly of zeolite Y precursors are attractive for the potential application in heavy oil catalytic cracking. A relatively more eco-friendly synthesis of MA with low synthesis cost and waste water discharge is particularly appealing. We report on the green synthesis of MA via a multiple-assembly/one-pot-crystallization (MA/OC) process by recycling the non-reacted reagents in the assembly mother liquor after separating the assembly solid product. This approach was achieved by exact supplementary compensation of the consumed raw materials and correct pH adjustment for the assembly liquor after each cycle of assembly. The assembly solid products in 5 cycles were collected and crystallized in one-pot in the mother liquor. Characterization results indicated that consumption of P123 and water discharge of MAOC-5 could be reduced to 51.5% and 27.3% of those of conventional MA-1. Meanwhile, the product yield of MAOC-5 is 102.66 g L À1 , 4.8 times that of MA-1. This strategy suggests a relatively more eco-friendly and low cost route for the synthesis of hydrothermally stable MA.

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Hydrothermally stable mesoporous aluminosilicates with moderate acidity via degradation-assembly process and improved catalytic properties

Cited by 12 publications

References 18 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

Hydrothermally stable macro-meso-microporous materials: synthesis and application in heavy oil cracking

A multiple-assembly/one-pot-crystallization strategy for a relatively more eco-friendly synthesis of hydrothermally stable mesoporous aluminosilicates

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