Direct incorporation of A1 in SBA mesoporous materials: characterization, stability and catalytic activity

Yue, Yuanhe; Gédéon, A.; Bonardet, J.L.; d'Espinose, Jean-Baptiste; Melosh, Nicholas A.; Fraissard, J.

doi:10.1016/s0167-2991(00)80216-5

Cited by 51 publications

(33 citation statements)

References 15 publications

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“…During materials preparation via post synthetic methods often metal oxides are formed in the channels or on the external surface. Metal oxides formed in the mesopores will block the pores partially or fully, thereby reducing surface area, pore volume, and pore diameter, or play a negative role in catalysis Yue et al (19) reported the direct synthesis of AlSBA-15 and found that catalytic activity of AlSBA-15 in cumene cracking is higher as compared to AlMCM-41. However, the highly acidic synthesis gel required for the formation of SBA-15 limits the direct incorporation of high amounts of trivalent metal ions into the neutral silica framework and requires a post synthetic treatment to remove octahedral aluminum.…”

Section: Transition Metal Incorporationmentioning

confidence: 99%

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Gobara

2016

Egypt. J. Chem.

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ILICATE mesoporous materials have received widespread interest …..because of their potential applications. These novel materials, prepared either by soft-or hard-templating syntheses, become more and more important in many fields of science and technology such as adsorption, catalysis, separations, environmental processes, nanotechnology and biotechnology. According to IUPAC definition inorganic solids that contain pores with diameter in the size range of 2-50 nm are considered mesoporous materials, They also possess extremely high surface areas (>700 m 2 g −1) and narrow pore size distributions. This article review shows the current state of art and outlines the recent patents in mesoporous materials research in three general areas: synthesis, various mechanisms involved for porous structure formation and applications of mesoporous materials based on silica and alumina.

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Section: Transition Metal Incorporationmentioning

confidence: 99%

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Gobara

2016

Egypt. J. Chem.

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“…They discovered that, in comparison with direct synthesis method, the acidity and catalytic activity of Al-SBA-15 synthesized by post-grafting method has shown to be higher due to (Yue et al, 2000) VP cm −3 g −1 = 1.53 that Al-SBA-15 is more stable than pure SBA-15 in which the pore size, d(100) spacing, wall Dp nm −1 = 7.4 thickness still remain the same. However, specific surface area and pore volume decrease d(100) / = 108 in basic medium treatment which indicated the disappearance of microporous phase.…”

Section: Post-graftingmentioning

confidence: 99%

“…Modifying SBA-15: Despite promising properties of SBA-15 in catalysis, biomolecule separation, etc, there is still a need to modify or functionalize SBA-15 i.e., to overcome its limitation of low acidity strength (Yue et al, 2000), enhance and optimize its catalytic activity by supporting (Grieken et al, 2005), reusability (Liu et al, 2009) and enzymatic activity (Takimoto et al, 2008). Besides, SBA-15 is one of the best candidates to be modified and functionalized since it has controllable pore size, pore volume and high surface area (Liu et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…From available literature articles, modified and functionalized SBA-15 can be categorized into different types: (Eswaramoorthi et al, 2009, Prieto et al, 2009 • Different types of metal incorporation into SBA-15 framework i.e., Al, Ce, La, Ti, Mg, Ca , Kim et al, 2004, Yue et al, 2000 Synthesis: Methods: Various methods of synthesis have been employed, which includes direct synthesis, post synthetically impregnation and grafting, sol-gel as well as immobilization (Cui et al, 2005, Grieken et al, 2005, Li et al, 2009, Carrero et al, 2007. Table 1 list down different types of modifying SBA-15 and syntheses.…”

Section: Introductionmentioning

confidence: 99%

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A Review: Mesoporous Santa Barbara Amorphous-15, Types, Synthesis and Its Applications towards Biorefinery Production

Rahmat¹

2010

American Journal of Applied Sciences

136

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Problem statement: Santa Barbara Amorphous (SBA-15) is significant mesoporous silica with exclusive and important properties of highly ordered mesopores, hydrothermally stable and thick wall, profusely large surface area and huge pore volume which render it as promising catalyst for wide applications. However, the purely siliceous SBA-15 which lacks of acidity characteristic hinders its ideal capabilities as catalyst. Moreover, functionalization and modification of SBA-15 could enhance and optimize its catalytic activity. Conclusion/Recommendations: Thus, in this review, the various types and different synthesis of modifying SBA-15 are discussed in detail towards its application in biorefinery production. The catalytic activities in various operating conditions and reactions are also reviewed for future reference and scope of studies.

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“…Recently, many studies have been devoted to the incorporation of Al, Ti, Zr, Sn and V species into the framework of SBA-15 for modulating redox and acidity properties [5]. Typical methods have included "post synthesis" [4,6,7] and "direct synthesis" [8,9] grafting procedures. Direct synthesis methods incorporate aluminum species into the original synthesis system before hydrothermal processing under specialized conditions; however, the respective structures of the materials and the structure order are usually destroyed as the metal content increases.…”

Section: Introductionmentioning

confidence: 99%

Post Synthesis of Aluminum Modified Mesoporous TUD-1 Materials and Their Application for FCC Diesel Hydrodesulfurization Catalysts

Xia

Duan

et al. 2017

Catalysts

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Post-synthesis methods are a promising technology and have received much attention. In this paper, a series of post-synthesis aluminum modified TUD-1 (PAT) materials with different Al contents were successfully prepared by using aluminum isopropoxide to be Al sources, then the as-synthesized materials were adopted as support additives mixed with commercial γ-Al 2 O 3 to prepare hydrodesulfurization (HDS) catalysts for FCC diesel. The supports and catalysts were analyzed using N 2 adsorption-desorption, XRD, SEM, Py-IR, ICP, 27 Al MAS NMR, UV-vis, H 2 -TPR and HRTEM techniques. The results of Py-IR and 27 Al MAS NMR indicated that the addition of Al species could bring Lewis (L) and Brönsted (B) sites into Si-TUD-1, and that the material of PAT-3 had the highest total acidity sites and Brönsted acid sites among the series PAT composites. The HRTEM technique showed that, compared to the traditional catalyst NiMo/γ-Al 2 O 3 , the sulfided catalyst NiMo/APAT-3 had a relatively short length (3.2 nm) and suitable stacking number (2.5) of MoS 2 slabs. The HDS efficiencies of all the catalysts were tested in a fixed bed micro-reactor with FCC diesel as feedstock. The catalytic results confirmed that the catalyst NiMo/APAT-3 possessed the highest HDS efficiency (97.0%), due to synergistic effects of advantageous properties such as higher acidity, moderate MSI, and relatively short length of the MoS 2 slabs.

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Direct incorporation of A1 in SBA mesoporous materials: characterization, stability and catalytic activity

Cited by 51 publications

References 15 publications

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

A Review: Mesoporous Santa Barbara Amorphous-15, Types, Synthesis and Its Applications towards Biorefinery Production

Post Synthesis of Aluminum Modified Mesoporous TUD-1 Materials and Their Application for FCC Diesel Hydrodesulfurization Catalysts

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