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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2710
Title: Dimethyl carbonate synthesis from carbon dioxide using ceria-zirconia catalysts prepared using a templating method: Characterization, parametric optimization and chemical equilibrium modeling
Authors: Kumar P.
With P.
Srivastava, Vimal Chandra
Shukla K.
Gläser R.
Mishra I.M.
Published in: RSC Advances
Abstract: In this paper, a series of CexZr1-xO2 solid solution spheres were synthesized by exo- and endo-templating methods and tested for dimethyl carbonate (DMC) synthesis using direct conversion of CO2. The synthesized catalysts were characterized by X-ray diffraction (XRD), N2-physisorption, scanning electron microscopy (SEM), and CO2/NH3-temperature-programmed desorption (TPD). Formation of CexZr1-xO2 solid solutions with tetragonal and cubic crystal structures depending on cerium/zirconium compositions was confirmed by XRD analysis. The specific surface area of the mixed oxide decreased and the average pore diameter increased with an increase in the ceria content, with the exception of the mixed oxides with x = 0.4-0.5 i.e. Ce0.4Zr0.6O2 and Ce0.5Zr0.5O2. The basic and acidic site density of the synthesized catalysts was in the order: ZrO2 < CeO2 < Ce0.5Zr0.5O2, and the basic and acidic site density per unit area followed the same order. The best Ce0.5Zr0.5O2 catalyst was further used for the optimization of reaction conditions such as reaction time, reaction temperature, catalyst dose and reusability for DMC synthesis. Furthermore, study of chemical equilibrium modeling was done using the Peng-Robinson-Stryjek-Vera equation of state (PRSV-EoS) along with the van der Waals one-fluid reaction condition so as to calculate change of Gibbs free energy (?G°) and heat of reaction (?H°). © 2016 The Royal Society of Chemistry.
Citation: RSC Advances (2016), 6(111): 110235-110246
URI: https://doi.org/10.1039/c6ra22643d
http://repository.iitr.ac.in/handle/123456789/2710
Issue Date: 2016
Publisher: Royal Society of Chemistry
ISSN: 20462069
Author Scopus IDs: 57164203600
36159965000
35565811700
57188985875
7202586559
23668474600
Author Affiliations: Kumar, P., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India, Institute of Chemical Technology, Universität Leipzig, Linnéstraße 3, Leipzig, 04103, Germany
With, P., Institute of Chemical Technology, Universität Leipzig, Linnéstraße 3, Leipzig, 04103, Germany, Chemical Division, Leibniz Institute for Surface Modification, Permoserstr. 15, Leipzig, 04318, Germany
Srivastava, V.C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Shukla, K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Gläser, R., Institute of Chemical Technology, Universität Leipzig, Linnéstraße 3, Leipzig, 04103, Germany
Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India, Department of Chemical Engineering, Indian Institute of Technology (ISM), Dhanbad, 826004, India
Corresponding Author: Srivastava, V.C.; Department of Chemical Engineering, Indian Institute of Technology RoorkeeIndia; email: vimalcsr@yahoo.co.in
Appears in Collections:Journal Publications [CH]

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