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

Liu, Hongtao; Wang, Kun; Shi, Yunfeng; Gao, Xionghou; Liu, Honghai; Wang, Baojie; Chen, Xu

doi:10.1039/c4ra03752a

Cited by 10 publications

(7 citation statements)

References 24 publications

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“…In recent years, the fabrication of hierarchically macro-mesoporous materials has received great attention due to their high surface areas and mesopore-macropore system being able to efficiently transport reactants to catalytic sites. [36][37][38][39][40] For example, hierarchical macro-/mesoporous titania prepared by a simple hydrolysis and then calcination at 300 C shows higher photocatalytic activity than P25. 38 In our previous work, hierarchically macromesoporous Pt/g-Al 2 O 3 composite catalyst was prepared and used for formaldehyde oxidation at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically macro-mesoporous flowerlike Pt/NiO composite microspheres for efficient formaldehyde oxidation at room temperature

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Hierarchically macro-mesoporous flowerlike Pt/NiO composite microspheres for efficient formaldehyde oxidation at room temperature

et al. 2015

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“…В настоящее время широко ведутся исследования в области создания эффективных технологий переработки тяжелых нефтей и природных битумов, обогащенных смолистоасфальтеновыми веществами гетероатомами и металлами, наличие которых не позволяет перерабатывать такое сырье традиционными способами с получением высокого выхода светлых фракций [1][2][3]. Перспективными для переработки тяжелых нефтяных систем считаются процессы, основанные на крекинге сырья в присутствии каталитических систем, инициирующих добавок, доноров водорода при различных температурах и давлениях, в т. ч. сверхкритических условиях [4][5][6][7][8][9][10][11][12]. При этом базовые для переработки тяжелого углеводородного сырья термические процессы не теряют своей актуальности и продолжают развиваться [13][14][15].…”

Section: ведениеunclassified

Thermal Transformations of Asphaltenes at a Temperature of 120 °C

S.¹,

S.²,

K.³

2019

J. Sib. Fed. Univ. Chem.

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Thermolysis of asphaltenes from three heavy oils was carried out at a temperature of 120 °C in a current of N 2 with the withdrawal of the resulting products from the reaction zone. Composition and structure analysis of thermolysis products showed, that at 120 °C petroleum afaltenes are subject to thermal destruction due to breaking of covalent bonds with the formation of gas, oils and resins, exceed 13 % by weight. It is established that the main directions of asphaltene thermal transformations during thermolysis are an increase aromaticity and decrease content of naphthenic and aliphatic carbon. The reactivity and thermal transformations intensity of asphaltene molecules depend on the number of reaction centers in them. Reaction centers represent a weak aliphatic heteroatomic

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“…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%

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

Cited by 10 publications

References 24 publications

Hierarchically macro-mesoporous flowerlike Pt/NiO composite microspheres for efficient formaldehyde oxidation at room temperature

Hierarchically macro-mesoporous flowerlike Pt/NiO composite microspheres for efficient formaldehyde oxidation at room temperature

Thermal Transformations of Asphaltenes at a Temperature of 120 °C

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

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