Catalytic properties of spinel-type mixed oxides in transesterification of vegetable oils

Sankaranarayanan, T. M.; Shanthi, R. Vijaya; Thirunavukkarasu, K.; Pandurangan, A.; Sivasanker, S.

doi:10.1016/j.molcata.2013.08.027

Cited by 31 publications

(12 citation statements)

References 34 publications

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“…Sanakarnarian et al, [18] examined the activity of various types of spinel alumina (CuAl 2 O 4 , NiAl 2 O 4 , CoAl 2 O 4 and ZnAl 2 O 4 ) on biodiesel production. Tests suggest that copper-alumina and zinc-alumina catalysts demonstrated higher-level activity than other catalysts.…”

Section: Introductionmentioning

confidence: 99%

A study on the structure and catalytic performance of ZnxCu1−xAl2O4 catalysts synthesized by the solution combustion method for the esterification reaction

Hashemzehi

Saghatoleslami

Nayebzadeh

2016

Comptes Rendus. Chimie

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a b s t r a c tA Zn x Cu 1Àx Al 2 O 4 catalyst was prepared via the microwave-assisted solution combustion method (MSC). This method presents a fast procedure for industrial scale catalyst preparation. The physicochemical properties of the fabricated catalyst were characterized using XRD, FTIR, BET, SEM and TEM analyses. The catalytic performance through the esterification reaction was examined under the following conditions: reaction temperature ¼ 180 C, catalyst concentration ¼ 3% (w/w), molar ratio of oleic acid to methanol ¼ 9 and reaction time ¼ 6 h. XRD results showed that loading both zinc and copper oxides on alumina at a ratio of amounts that were nearly the same resulted in decreased crystalline size and well-dispersed copper-alumina and zinc-alumina crystals. Moreover, the mean pore diameter of the sample was increased by simultaneous loading of zinc and copper oxides on alumina that enhanced permeation of the reactants within pores and increased the interaction of the reactant with the catalyst active sites. The catalyst showed minimum tendency towards adsorbing moisture from air, which was attributed to it having less atoms on the surface through which binding with H 2 O molecules takes place. The highest level of activity in the esterification reaction (96.9%) was obtained at the optimum ratio of the Zn:Cu molar ratio, identified to be 2:3. The sample particles ranged from 10 to 30 nm in size, without agglomeration.

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Section: Introductionmentioning

confidence: 99%

A study on the structure and catalytic performance of ZnxCu1−xAl2O4 catalysts synthesized by the solution combustion method for the esterification reaction

Hashemzehi

Saghatoleslami

Nayebzadeh

2016

Comptes Rendus. Chimie

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“…By the year 2000, the global productions of palm, soybean and rapeseed oils were 20, 25 and 15 million tonnes but increased to 50, 41 and 25 million tonnes in 2012, with further increase projected for the current and future years [1]. Vegetable oils are primarily employed in the energy industry for conversion into biodiesel, mostly via the process of catalytic transesterification [2], [3], [4], [5], [6] and [7]. However, the current trend in the global energy crisis as related to fossil fuels production and consumption accounted for evaluating the prospects of the vegetable oils in the production of jet fuels (i.e.…”

Section: Introductionmentioning

confidence: 99%

Catalytic upgrading of vegetable oils into jet fuels range hydrocarbons using heterogeneous catalysts: A review

Galadima

Muraza

2015

Journal of Industrial and Engineering Chemistry

117

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“…The metal ion with large size tends to prefer the tetrahedral site and the metal ion with the smallest size tend to prefer octahedral site [1,2], such as spinel catalyst SrAl2O4, ZnFe3O4 [3,4]. In these oxides, Sr and Zn as a larger divalent ions occupy the tetrahedral sites while Al and Fe as a smallest trivalent ions occupy the octahedral sites in spinel oxides structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Catalytic Activity of NiO-Mn2O3/ZrO2 Spinel Co-Catalysts

Kadhim¹

2018

Asian J. Chem.

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The spinel co-catalyst NiO-Mn2O3/ZnO2 in two different ratios (0.5:0.5:2) and (1:2:1) of the components oxides were prepared using coprecipitation method of their metal hydroxides. This method was performed in basic medium (pH 9), using sodium carbonate as a precipitated agent. The precipitated samples dried at 120 ºC overnight and then calcinated at 650 ºC for three hours. The prepared spinel co-catalyst was investigated using powder X-ray diffraction, Fourier transfer infrared spectroscopy, energy-dispersive X-ray spectroscopy and atomic force microscopy. According to spectroscopic studies and magnetic properties, the obtained co-catalyst was a normal spinel type. The catalytic activity of prepared co-catalysts was conducted by following photocatalytic degradation of Bismarck Brown G dye. From the obtained results, the best ratio of spinel catalyst was (0.5:0.5:2) optimized, which achieved a higher activity for removal percentage (97 %) dye.

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Catalytic properties of spinel-type mixed oxides in transesterification of vegetable oils

Cited by 31 publications

References 34 publications

A study on the structure and catalytic performance of ZnxCu1−xAl2O4 catalysts synthesized by the solution combustion method for the esterification reaction

A study on the structure and catalytic performance of ZnxCu1−xAl2O4 catalysts synthesized by the solution combustion method for the esterification reaction

Catalytic upgrading of vegetable oils into jet fuels range hydrocarbons using heterogeneous catalysts: A review

Synthesis, Characterization and Catalytic Activity of NiO-Mn2O3/ZrO2 Spinel Co-Catalysts

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