Enhanced surface acidity of Si–Zr-MCM-41 mesoporous molecular sieve by sulfation and its catalytic activity in cyclic acetalyzation and functional group protection by pyranylation

Nedumaran, D.; Pandurangan, A.

doi:10.1016/j.micromeso.2012.09.026

Cited by 10 publications

(1 citation statement)

References 25 publications

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“…The relative peak areas of ZrS 2 , ZrS 3 , and ZrS 4 are 135.3, 148.2, and 179.2, respectively, indicating that the order of acid amount is ZrS 2 <ZrS 3 <ZrS 4 in the SO 4 2− /Zr-SBA-15 materials. This could be ascribed to the higher ionicity of Zr-O bonds in zirconia-silicon materials, and be related to the strong interaction between the supported zirconia and the silica support, consequently, enhancing the Lewis acidity of metal sites [5,16,28].…”

Section: Nh 3 -Tpd Analysismentioning

confidence: 99%

Biodiesel Production from Waste Cooking Oil over Mesoporous SO42−/Zr-SBA-15

Zhang

Lei

Zhang

et al. 2015

Chinese Journal of Chemical Physics

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Biodiesel production from waste cooking oils over SO 4 2− /Zr-SBA-15 catalyst was successfully carried out and investigated. SO 4 2− /Zr-SBA-15 catalyst was prepared by one-step process using anhydrous zirconium nitrate as zirconium resource, and endowed with the strong Lewis acid sites formed by supporting the zirconium species onto the SBA-15 surface. The asprepared SO 4 2− /Zr-SBA-15 showed excellent triglyceride conversion efficiency of 92.3% and fatty acid methyl esters (FAME) yield of 91.7% for the transesterification of waste cooking oil with methanol under the optimized reaction conditions: the methanol/oil molar ratio of 30, the reaction temperature of 160 • C, the reaction time of 12 h and 10wt% of catalyst. It was noticed that the as-prepared SO 4 2− /Zr-SBA-15 materials with the higher area surface of mesoporous framework and the surface acidity displayed excellent stability and reusability, maintaining high FAME yield of (74±1)% after seven runs of reaction.

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Section: Nh 3 -Tpd Analysismentioning

confidence: 99%

Biodiesel Production from Waste Cooking Oil over Mesoporous SO42−/Zr-SBA-15

Zhang

Lei

Zhang

et al. 2015

Chinese Journal of Chemical Physics

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Preparation and Catalytic Properties of Carbon Carrier-Supported Ruthenium Catalysts for Acetalization/Ketalization Reactions

et al. 2017

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Two kinds of supported catalysts of Ru/CNTs (CNTs=carbon nanotubes) and Ru/CB (CB=Vulcan XC‐72) were prepared with the two different carbon carrier of CNTs and CB and were well characterized. The condensation reaction of several carbonyl compounds with different diols including ethanediol, 1,2‐propandiol, 1,3‐propandiol, 1,2‐dimethylethanediol and 2,2‐ dimethylpropandiol, respectively. It was found that various aldehydes and ketones were successfully transformed to the corresponding acetals and ketals with the catalysis of the two catalysts. Recyclability tests revealed that there was no obvious decreasing of the catalytic activities after 5 runs of the catalysts.

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