One-step synthesis of chromium and aluminium containing SBA-15 materialsNew phillips catalysts for ethylene polymerization

Aguado, J.; Calleja, Guillermo; Carrero, A.; Moreno, Jovita

doi:10.1016/j.cej.2007.06.022

Cited by 33 publications

(27 citation statements)

References 34 publications

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“…In general, it can be explained that the introduction of the Al species followed by calcinations resulted in the formation of ink-bottle type pores within the substrate [26,27]. This trend is in consistent with the loss of specific area after incorporation of alumina in SBA-15 support due to the shrinkage of the pores by the Al clusters [28,29]. Figure 3 shows SEM and TEM images of Al/SBA-16 (20) morphologies and ordered mesostructure, respectively.…”

Section: Textural Properties and Characterizationsupporting

confidence: 69%

An Easy Route to Synthesize Novel Mesostructured Silicas Al/SBA-16 and Its Catalytic Application

Wang

et al. 2010

Catal Lett

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Al-containing SBA-16 (with different Si/Al molar ratios) was prepared by an easy post-grafting method using F127 as structure-directing agent and aluminum isopropoxide as Al source. The structure of the solid catalyst was fully characterized by X-ray diffraction (XRD) analysis, N 2 adsorption, scanning electron micrographs (SEM), transmission electron micrographs (TEM) and 27 Al MAS NMR. The results indicated that the materials possess three-dimension caged-like mesostructure and Al was successfully incorporated into the SBA-16 framework. The acid properties have been estimated by FT-IR of pyridine adsorption (Py-IR). Among various Si/Al ratios, Al/SBA-16 with Si/Al ratio 20 performed good catalytic activity for the tert-butylation of phenol. Compared to hexagonal mesoporous Al/SBA-15, Al/SBA-16 showed higher catalytic properties due to its cage-like mesostructure, which could make the active acid sites more accessible to the reactant.

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Section: Textural Properties and Characterizationsupporting

confidence: 69%

An Easy Route to Synthesize Novel Mesostructured Silicas Al/SBA-16 and Its Catalytic Application

Wang

et al. 2010

Catal Lett

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“…Synthesis of SBA‐15 was performed in a 300 mL autoclave (Parr Instruments) by using the methods mentioned by Zhao et al., Kumaran et al., and Aguado et al 16. 19, 20 with some modifications. The reagents used in the synthesis were Pluronic P123 (BASF) co‐block polymer, hydrochloric acid (Merck), TEOS (Merck), aluminium isopropoxide (Merck) and distilled water.…”

Section: Methodsmentioning

confidence: 99%

Formation of Furfural in Catalytic Transformation of Levoglucosan over Mesoporous Materials

Käldström¹,

Kumar²,

Heikkilä³

et al. 2010

ChemCatChem

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Catalytic transformations of levoglucosan (1‐6‐anhydro‐β‐D‐glucopyranose) and furfural were carried out in a fixed‐bed reactor at 573 K over mesoporous materials. Proton forms of MCM‐41, MCM‐48, SBA‐15, and platinum form of MCM‐48 catalysts were tested in the reaction, whereas H‐Beta and quartz sand were used as reference materials. The yield of the transformation products was substantially influenced by the catalyst structures. Oxygenated species were the main liquid products, consisting mainly of aldehydes and furfural. The formation of furfural was the highest over MCM‐41 catalyst followed by SBA‐15, MCM‐48, and H‐Beta catalyst. All catalysts were to some extent deactivated due to coke formation. However, it was possible to successfully regenerate the spent catalysts without changing the structure.

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“…Especially given its thicker walls (31-64 Å), SBA-15 provides a thermal stability and hydrothermal stability that exceed those for the thinner walled MCM-41 materials [2,3]. Furthermore, metal-containing SBA-15 materials have been successfully incorporated by direct synthesis process such as Al [4], CrAl [5], Ti [3], TiAl [6] and Ru [7]. These materials have also attracted much attention due to their potential applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of mesoporous, tungsten-containing molecular sieve composites

Zhang

Yuan

et al. 2009

Journal of Non-Crystalline Solids

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One-step synthesis of chromium and aluminium containing SBA-15 materialsNew phillips catalysts for ethylene polymerization

Cited by 33 publications

References 34 publications

An Easy Route to Synthesize Novel Mesostructured Silicas Al/SBA-16 and Its Catalytic Application

An Easy Route to Synthesize Novel Mesostructured Silicas Al/SBA-16 and Its Catalytic Application

Formation of Furfural in Catalytic Transformation of Levoglucosan over Mesoporous Materials

Synthesis and characterization of mesoporous, tungsten-containing molecular sieve composites

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