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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2666
Title: The preparation and efficacy of SrO/CeO2 catalysts for the production of dimethyl carbonate by transesterification of ethylene carbonate
Authors: Kumar P.
Kaur R.
Verma S.
Srivastava, Vimal Chandra
Mishra I.M.
Published in: Fuel
Abstract: The need for eco-friendly fuels has given a fillip to search for new molecules and their cost-effective synthesis. A series of ceria-strontium (CexSr1?xO2; x = 0 to 1) catalysts were prepared by a citric acid assisted sol–gel method. These catalysts were characterized by BET, XRD, SEM-EDAX, ICP-MS, FTIR, NH3-TPD and CO2-TPD techniques and tested for the synthesis of dimethyl carbonate (DMC) in a batch reactor for the transesterification of ethylene carbonate (EC). The activity of the synthesized catalysts was found to be closely related to basic and acidic sites, and the surface area of the catalysts. The catalyst, Ce0.6Sr0.4, showed highest basicity and acidity, and was found to be most effective in the formation of DMC from transesterification of EC. Reactions were carried out by varying the particle size (50–800 ?m) and agitation speed (200–600 rpm) for minimizing the internal mass transfer resistance and the external mass transfer resistance, respectively. Further, Ce0.6Sr0.4 catalyst was used to optimize the reaction conditions such as methanol/EC molar ratio (in the range of 4–12), catalyst dose (in the range of 2–5 wt% of EC), reaction time (in the range of 2–6 h) and temperature (in the range of 100–180 °C) for DMC yield and EC conversion. At the optimum conditions of methanol/EC molar ratio of 8, 3 wt% of catalyst, 5 h reaction time and 150 °C temperature, the DMC selectivity was 87% and EC conversion of 82%, with a reaction rate of ?0.547 mol/L.h (with respect to EC). The reusability of the Ce0.6Sr0.4 catalyst for EC conversion with turn-over frequency and DMC selectivity were also studied. © 2018 Elsevier Ltd
Citation: Fuel (2018), 220(): 706-716
URI: https://doi.org/10.1016/j.fuel.2018.01.137
http://repository.iitr.ac.in/handle/123456789/2666
Issue Date: 2018
Publisher: Elsevier Ltd
Keywords: Cerium-strontium mixed oxide
Dimethyl carbonate
Ethylene carbonate
Transesterification
ISSN: 162361
Author Scopus IDs: 57164203600
57213732897
15841096500
35565811700
23668474600
Author Affiliations: Kumar, P., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Chemical Engineering, University of California, Santa Barbara, CA 93106, United States
Kaur, R., Department of Computer Science & Engineering, Jaypee Institute of Information Technology, Waknaghat, Himachal Pradesh 173234, India
Verma, S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
Srivastava, V.C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Chemical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
Corresponding Author: Kumar, P.; Department of Chemical Engineering, University of CaliforniaUnited States; email: praveen.singh@daad-alumni.de
Appears in Collections:Journal Publications [CH]

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