Masters Theses

Keywords and Phrases

Carbon dioxide; Catalysts; Ceria; DMC; Utilization

Abstract

"In this study, three different shapes of ceria (CeO2) nanostructures (e.g., nanooctahedra, nanocubes and nanorods) were synthesized via the hydrothermal method and screened for carbonylation reaction. Of these three shapes of nanostructures, the nanorod was doped with metals such as Ca, Ni, Cu, and Co by wet impregnation method. All materials were characterized by XRD, NH3/CO2-TPD, XRF, FTIR and N2 physorption to determine the crystal size and phases, acid-base properties, metal loading, and surface properties. The obtained materials were employed as catalysts for the activation of Carbon Dioxide (CO2) and methanol carbonylation reaction to dimethyl carbonate (DMC) at 140 °C, 30 bars and 3 h. It was found that the shape of the nanostructured ceria has a major effect on DMC yield with the CeO2 nanorod catalyst producing the highest DMC yield (1.6 mmol) followed by nanooctahedra (0.66 mmol) and nanocubes (0.32 mmol). All catalytic tests showed 100 % DMC selectivity, and the trends of catalytic activity over ceria doped metal oxide decreased in the following order: CeO2 > CoO/CeO2 > NiO/CeO2 > CaO/CeO2 > CuO/CeO2. The reusability of the catalyst was tested by carrying out four consecutive cycle"--Abstract, page iii.

Advisor(s)

Rownaghi, Ali A.

Committee Member(s)

Rezaei, Fateme
Liang, Xinhua

Department(s)

Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2018

Pagination

ix, 51 pages

Note about bibliography

Includes bibliographic references (pages 40-50).

Rights

© 2018 Jawad Hassan A Al Drwish, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11705

Electronic OCLC #

1164805454

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