Characterization of various zinc oxide catalysts and their activity in the dehydration-dehydrogenation of isobutanol

Abstract

Mono and bifunctional zinc oxide catalysts were prepared to study their activity in the catalytic conversion of isobutanol. The prepared catalysts were characterized by X-ray diffraction analysis and nitrogen adsorption measurements. The conversion of isobutanol was taken as a model reaction to measure the catalytic activity of the prepared oxide catalysts. The overall conversion yield of competitive dehydration-dehydrogenation reactions of isobutanol was found to be higher over the binary oxide catalysts than over the single oxide one at all reaction temperature within the range 250-400 °C. The binary oxide catalysts were more selective for isobutene, as the predominant dehydrated product. The single oxide catalyst exhibited higher selectivity towards isobutyraldehyde as the dehydrogenated product, and the selectivity increased with increasing reaction temperature.

Efficient transformation in characteristics of cations supported-reduced graphene oxide nanocomposites for the destruction of trichloroethane

“…It is evident that diffraction peaks shifted towards low angle due to the heat treatment induced in the ST synthesis that increased the interlayer spacing of the sample [35]. The shift might be due to the increase in copper contents observed in the EDS analysis.…”

“…Nitrogen filling occurs approximately at P/Po = 0.40–0.80 due to the capillary condensation occuring in pores, reflecting a high uniformity of mesopores. The beginning of the linear middle section of the isotherm denotes the completion of monolayer adsorption and the beginning of multilayer behavior [35]. The sorption process varies depending on the size of pores that increase from micro to meso, and concomitantly the relative pressure needed to fill the pores will also increase.…”

Investigation on Temperature Sensing of Nanostructured Zinc Oxide Synthesized via Oxalate Route

“…Nano sized zinc oxide due to the large band gap 3.37 eV and high exciton binding energy of 60 meV shows various useful properties and gives large and diverse range of growth of different type of morphologies such as nanosheets, nanocombs, nanobelts, nanowires and nanorings, which may be used in various applications [1][2][3][4][5][6]. It is one of the promising materials among metal oxides for use in different types of sensors [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

“…It is one of the promising materials among metal oxides for use in different types of sensors [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. As the temperature is an important parameter for measuring the different properties of materials.…”

Synthesis of 3-Methylindole from Glycerol Cyclization with Aniline over CuCr/Al2O3Catalysts Modified by Alkali Earth Oxides

“…From results of the above catalytic tests, it is observed that the introduction of Cu-active species and basic species improves 3-MI formation, and another cyclization product such as 3-IMol is also found to be formed. As reported [15][16][17], the basic sites are typical catalytic centers for dehydrogenation of alcohols to aldehydes. Therefore, it is proposed that the formation of SB is from AN and intermediate 2,3dihydroxypropanal produced by the dehydrogenation of GL molecules [3] over Cu 0 particles or basic sites (Scheme 4).…”