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AuthorKumar, Anand
AuthorAshok, Anchu
AuthorTarlochan, Faris
Available date2022-09-15T07:07:59Z
Publication Date2019
Publication NameAIChE Annual Meeting, Conference Proceedings
ResourceScopus
URIhttp://hdl.handle.net/10576/34061
AbstractIn this work, we report the catalytic dehydrogenation of ethanol over porous cobalt oxide and nickel-cobalt bimetal oxide (NiCoO2). Catalyst deactivation and the nature of carbon formation on these two catalysts are studied in detail to correlate the active phase with carbon formation. In-situ FTIR analysis was conducted between 50°C to 400°C on Co3O4 and NiCoO2 catalysts to understand the reaction mechanism and product selectivity. Addition of Ni improves the activity for ethanol decomposition by achieving complete ethanol conversion at 350°C as compared to 420°C for cobalt alone. The crystallinity, morphology and particle analysis of the spent catalyst after reaction was identified using XRD, SEM and TEM respectively. The XRD shows a phase change of porous NiCoO2 to NiCo alloy, whereas SEM indicates the presence of fibrous structure on the surface with 91.7 % of carbon while keeping 1:1 ratio of Ni and Co after the reaction. The detailed analysis of carbon structure using HRTEM-STEM (Fig. 1) shows simultaneous growth of carbon nanofibers (CNFs) and multiwalled carbon nanotubes (MWCNTs) that were favored by larger and smaller crystallites respectively.
SponsorThis publication was made possible by NPRP grant (NPRP8-145-2-066) from the Qatar national research fund (a member of Qatar foundation).The statements made herein are solely the responsibility of the author(s). The authors also wish to acknowledge the technical services granted by Central Laboratory Unit (CLU) and Gas Processing Centre (GPC) at Qatar University.
Languageen
PublisherAmerican Institute of Chemical Engineers
SubjectEthanol decomposition
Hydrogen production
Nickel cobalt catalysts
Solution combustion synthesis
TitleCombustion synthesized nickel-cobalt catalyst deactivation by coking during ethanol decomposition reaction
TypeConference Paper
Volume Number2019-November
dc.accessType Abstract Only


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