Preparation and characterization of novel magnetic ZrO2/TiO2/Fe3O4 solid superacid

Wang, Jun; Yang, Piaoping; Fan, Meiqing; Wei, Yu; Jing, Xiaoyang; Zhang, Milin; Duan, Xue

doi:10.1016/j.matlet.2006.08.054

Cited by 22 publications

(12 citation statements)

References 18 publications

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“…Novel magnetic solid superacids ZrO 2 /TiO 2 /Fe 3 O 4 were prepared by introducing TiO 2 and magnetic substrates by chemical coprecipitation method. The synthesized samples showed lamellar crystals with high purity and uniform size distribution [18].…”

Section: Impregnating Methodsmentioning

confidence: 96%

Review of SO 2− 4 /M x O y solid superacid catalysts

Liao

2009

Front. Chem. Eng. China

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Some metal oxides modified with sulfate ions form highly acidic or superacidic catalysts. SO 2 -4 =M x O y solid superacid catalysts, play a vital role in more and more fields such as organic synthesis, fine chemicals, pharmaceuticals, and means for strengthening environmental safeguards. This review highlights the recent development of solid superacid catalysts based on SO 2 -4 =M x O y , including synthesis method, characterization of acid sites and acid strength, and applications.

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Section: Impregnating Methodsmentioning

confidence: 96%

Review of SO 2− 4 /M x O y solid superacid catalysts

Liao

2009

Front. Chem. Eng. China

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“…This suggests that the total acidity for the sample doped with Y 2 O 3 and the magnetic substrate is much greater than that for the pure sample. The high acidity can be due to the oxide-doping effect, which makes zirconia be stable in the tetragonal phase with more surface acidic sites [14,15]. The table also shows that the acidity increases with increased temperature up to 900°C, and then decreases with further temperature rise.…”

Section: Resultsmentioning

confidence: 94%

Synthesis, characterization and catalytic performance of a novel magnetic SO4 2−-Y2O3-Fe3O4-ZrO2 solid acid catalyst

Yang

Wang

Shang

et al. 2008

React Kinet Catal Lett

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“…The use of solid superacids has advantages such as a high concentration of catalytic sites, no corrosion of the reactor, ease of handling, less cost and they are easy to recover and reuse over the long-term as compared to homogeneous liquid acids and solid base catalysts [21,22]. Among all these prepared solid acid catalysts, TiO 2 -based catalysts have attracted worldwide attention for their varied applications in many organic reactions [23,24]. They have been used as supports and prime catalysts.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Production Potential from Littered Edible Oil Fraction Using Directly Synthesized S-TiO2/MCM-41 Catalyst in Esterification Process via Non-Catalytic Subcritical Hydrolysis

Bhuyan

Alam

Chu³

et al. 2017

Energies

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Due to uncontrolled consumption of fossil fuel it is necessary to use alternative resources as renewable energy. Among all the available liquid fuels biodiesel has drawn attention for producing less emissions and having less aromatic contents than diesel and because it can also be obtained from inferior grade feedstocks. Since the various uses of fats and oils have increased, a significant amount of waste animal fat and used edible oil is generated every year. In this work, we produced biodiesel from littered edible oil fraction (LEOF) via hydrolysis followed by catalytic esterification. Nearly 90% free fatty acids (FFA) content was achieved at 275 • C, after 45 min during hydrolysis and linoleic acid (C18:2) was observed to be the highest component. Compared to refined soybean oil (SBO) the reaction rate was accelerated by the auto-catalytic behavior of free fatty acids (FFA) in littered edible oil fraction (LEOF). For catalytic esterification, S-TiO 2 /MCM-41 catalyst was directly synthesized and characterized by using XRD, SEM, NH 3 -TPD and Brunauer Emmett Teller (B.E.T). The parameters such as; SO 4 −2 content, TiO 2 loading and calcination temperature were varied to get optimum free fatty acids (FFA) conversion. Fatty acid methyl ester (FAME) conversion was 99.29% using 1% S-TiO 2 /MCM-41 catalyst at 240 • C whereas 86.18% was observed with 3.5% catalyst at 180 • C with 20 min. Thus, using S-TiO 2 /MCM-41 catalyst in esterification via hydrolysis would be a better option for treating low quality feedstocks.

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Preparation and characterization of novel magnetic ZrO2/TiO2/Fe3O4 solid superacid

Cited by 22 publications

References 18 publications

Review of SO 2− 4 /M x O y solid superacid catalysts

Review of SO 2− 4 /M x O y solid superacid catalysts

Synthesis, characterization and catalytic performance of a novel magnetic SO4 2−-Y2O3-Fe3O4-ZrO2 solid acid catalyst

Biodiesel Production Potential from Littered Edible Oil Fraction Using Directly Synthesized S-TiO2/MCM-41 Catalyst in Esterification Process via Non-Catalytic Subcritical Hydrolysis

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