Doctoral Dissertations

Abstract

"Dry reforming of methane (DRM) could be a promising choice to utilize natural gas (mainly methane or CH4), recycle captured CO2, and produce valuable syngas. Promoters (e.g., CeO2 and MgO) on Ni/Al2O3 prepared by atomic layer deposition (ALD) and ALD-prepared ultrathin overcoating (e.g., ZrO2 and CeOx) on Ni/Al2O3 prepared by incipient wetness method were investigated for methane reforming.

MgO and CeO2 prepared by traditional incipient wetness method were used to promote the performance of ALD-prepared Ni nanoparticles (NPs) supported on four-channel α-Al2O3 hollow fibers and Al2O3 NPs support for DRM. CeO2 could help release NiO from inactive NiAl2O4. MgO could introduce surface oxygen and enhanced the adsorption of CO2.

ALD technique could effectively deposit highly dispersed Ni NPs (average size of 4.3 nm) on multiple 20-cm long four-channel α-Al2O3 hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al2O3-HF catalysts by reducing the void space.

ALD-prepared ultrathin ZrO2 or CeOx overcoating was used to promote Ni/Al2O3 catalyst for methane reforming. During the reduction process, ZrO2 ALD overcoating cracked and exposed the active Ni NPs and generated oxygen vacancy. CeOx ALD overcoating exhibited a sub-stoichiometric form with oxygen vacancy-rich property"--Abstract, p. iv

Advisor(s)

Liang, Xinhua

Committee Member(s)

Ludlow, Douglas K.
Al-Dahhan, Muthanna H.
Rezaei, Fateme
Nath, Manashi

Department(s)

Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2022

Pagination

xvi, 204 pages

Note about bibliography

Includes_bibliographical_references_(pages 199-203)

Rights

© 2022 Baitang Jin, All Rights Reserved

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12278

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