Preparation of highly superacidic sulfated zirconia via combustion synthesis and its application in Pechmann condensation of resorcinol with ethyl acetoacetate

Yadav, Ganapati D.; Ajgaonkar, Naishadh P.; Varma, Arvind

doi:10.1016/j.jcat.2012.05.004

Cited by 62 publications

(34 citation statements)

References 44 publications

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“…The calcined ZrO 2 at 433 K appears a very broad peak from A and B. The calcined ZrO 2 at 893 K appears the characteristic peak from C. Compared with C, the amount of tetragonal phase is gradually increasing in the D and E, especially in the E which has weak monoclinic peaks [13][14][15][16][17].…”

Section: Resultsmentioning

confidence: 98%

Adsorption desulfurization study with ionic liquid compound ZrO2/PSMIMHSO4

Gao

Zhang

et al. 2016

Appl Petrochem Res

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Two ionic liquids 1-methyl-imidazolium-3-propylsulfonate (PSMIM) and 1-methyl-imidazolium-3-propylsulfonate hydrosulfate (PSMIMHSO 4 ) were synthesized. Their ZrO 2 , ZrOCl 2 and ZrO 2 /SO 4 2-derivatives were prepared under different condition and their desulfurization performances were studied. Then compared with traditional materials and their original materials under the same condition, the result showed that PSMIMHSO 4 compounded with ZrO 2 at mass ratio of 1:1 exhibited the superior desulfurization activity at 433 K for 25 min with the material/oil (m/v) of 1:10, and its desulfurization rate reached 97.4 %.

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Section: Resultsmentioning

confidence: 98%

Adsorption desulfurization study with ionic liquid compound ZrO2/PSMIMHSO4

Gao

Zhang

et al. 2016

Appl Petrochem Res

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“…This rapid and easy process is being used for synthesis of uniform and most pure as well as mixed metal oxide nanoparticles (Tahmasebi and Paydar 2011;Nagabhushana et al 2013;Zhuravlev et al 2013;Gonzalez-Cortes and Imbert 2013;Chakrabortty and Gupta 2013;Yadav et al 2012). The characteristics of metal oxides in this case are mainly directed by enthalpy or temperature produced during combustion, which inherently depends on the type of fuel used and its ratio with oxidant (Purohit et al 2001a;Mani et al 2013;Yadav and Fernandes 2013;Yadav and Gawade 2013).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel titania membrane support via combustion synthesis route and its application in decolorization of aqueous effluent using microfiltration

Doke

Yadav

2015

Clean Techn Environ Policy

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A simple preparation method for synthesizing porous ceramic membrane support was developed from nanocrystalline titania powder using solution combustion synthesis. Different characteristics of combustion-synthesized titania membranes such as surface morphology, porosity, pore size, pure water and solvent permeability were measured using advanced characterization techniques. Novel titania membrane support sintered at 450°C showed mean pore diameter 0.33 lm, porosity of about 77.5 %, and pure water permeability 20.31 9 10 -5 L h -1 m -2 Pa -1 . Combustion-synthesized titania membrane supports were used in decolorization of commercial dye-based ink effluent using microfiltration. Effects of different parameters such as pressure, initial concentration of ink effluent, and pH on decolorization of ink effluent were studied. Furthermore, combustion-synthesized titania membranes operated at lower pressure (1 9 10 5 Pa) showed significant color removal ([99 %) and moderate chemical oxygen demand reduction with lower membrane fouling during decolorization of water-based ink effluent. Graphical AbstractKeywords Titania Á Combustion Á Inorganic membrane Á Ink effluent Á Microfiltration Abbreviations J Permeate flux (L m -2 h -1 ) Q Volume of permeate (L) S Permeable area of membrane (m 2 ) Electronic supplementary material The online version of this article (

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“…It is observed that the catalytic activity of unmodified SZ is often not strong enough and for this reason a number of transition metals like (Fe, Mn, Co, Al, Zn, Ni, Cr,…..etc.) have added to SZ resulting in catalysts with higher activity than unmodified SZ [4,21]. So in this work, the differences of catalytic behavior over undoped SZ and Zn doped SZ have been studied with relation to crystalline phase, acidity and Zn concentration.…”

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confidence: 99%

“…Coumarins are the benzo-2-pyrone derivatives mainly found in plants of the family of Rutaceae and Umbelliferae [13,21,22]. They are used in pharmaceuticals [23,24], insecticides [25], fluorescent [26] and dye lasers [27,28].…”

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confidence: 99%

“…Furthermore, these acids are corrosive, required in excess, difficult to separate and create critical environmental problems due to getting rid of the post reaction wastes [13][14][15]21]. To overcome these defects heterogeneous catalysts exhibit a remarkable role in Pechmann condensation reactions [13][14], especially nanocrystalline sulfated zirconia catalyst, which exhibits excellent performance under solvent free conditions [39].…”

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confidence: 99%

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Structural and Catalytic Properties of Sulphated Zirconia doped by Zn Oxide

2017

Egypt. J. Chem.

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ULFATED zirconia (SZ) and zinc supported sulfated ……zirconia (Zn/SZ) catalysts were synthesized, characterized and evaluated by coumarin synthesis reaction. The reaction was carried by reacting resorcinol and ethyl acetoacetate with a molar ratio 1:2 respectively. The investigated SZ and Zn/SZ catalysts were prepared by the simple impregnation method with an aqueous solution of H 2 SO 4 as a precipitating agent, followed by drying in rotary and finally calcined at 600 o C for 3 hrs. The physicochemical properties of the investigated catalysts were characterized by the X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and potentiometric titration to characterize the number and the strength of the acid sites. The 6%Zn/SZ catalyst possessed the maximum catalytic activity as well the number of acid sites. Increase of the tetragonal phase content in ZrO 2 increases the catalytic activity.

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Preparation of highly superacidic sulfated zirconia via combustion synthesis and its application in Pechmann condensation of resorcinol with ethyl acetoacetate

Cited by 62 publications

References 44 publications

Adsorption desulfurization study with ionic liquid compound ZrO2/PSMIMHSO4

Adsorption desulfurization study with ionic liquid compound ZrO2/PSMIMHSO4

Synthesis of novel titania membrane support via combustion synthesis route and its application in decolorization of aqueous effluent using microfiltration

Structural and Catalytic Properties of Sulphated Zirconia doped by Zn Oxide

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