Research on Chemical Intermediates p. 7619 - 7639 (2018)
Update date:2022-08-16
Topics:
Madduluri, Venkata Rao
Katari, Naresh Kumar
Peddinti, Nagaiah
Velpula, Venkataramana Kumar
Burri, David Raju
Kamaraju, Seetha Rama Rao
Jonnalagadda, Sreekantha B.
Abstract: Excellent catalytic activity of activated redbrick clay (ARB) for dehydration and highly selective conversion of cyclohexanol to cyclohexene and 1-phenylethanol to styrene is reported. The efficacy of the catalyst is compared with commercial catalysts, silica and α-Fe2O3, which performed poorly giving side products. Synergistic acidic properties and combinational Lewis and Bronsted acidic sites of ARB afforded superior performances relative to silica and α-Fe2O3 catalysts. Pyridine Fourier-transform-infrared spectra (FT-IR) and temperature-programmed desorption (NH3-TPD) measurements showed the presence of combinational Lewis and Bronsted acidic sites and a weak to mild acidic texture, which could facilitate favorable interaction between the ARB clay catalyst and the reactants (cyclohexanol and 1-phenylethanol). The physicochemical characteristics of ARB, commercial silica and α-Fe2O3 catalysts were investigated using X-ray diffraction, scanning electron microscopy, X-ray fluorescence, NH3-TPD, UV–visible diffuse reflectance spectroscopy, and pyridine FT-IR. Graphical abstract: [Figure not available: see fulltext.]
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