(448f) MoVNbTeO for Chemical Looping - Oxidative Dehydrogenation of Ethane
AIChE Annual Meeting
Wednesday, November 13, 2019 - 9:45am to 10:06am
The present study investigates the potential of chemical looping ODH (CL-ODH) of ethane. A multimetallic catalyst, namely MoVNbTeO, was chosen as the primary catalyst for this study, given its high activity for ODH. The choice was confirmed by a wide catalyst screening, spanning other active metals and oxygen carriers. The activity of MoVNbTeO was optimised for CL by tuning preparation conditions, most importantly calcination regimes. XRD, TGA and SEM-EDS confirmed the improved crystal structure, high oxygen capacity and homogenous distribution of metals for the developed catalysts.
To further enhance ethylene yield, particulate oxygen carriers composed of bismuth oxides supported on ceria-zirconia were physically mixed with the catalyst. This class of oxygen carriers can selectively combust hydrogen in the presence of ethylene. The results showed that the presence of the oxygen carriers slightly improved conversion and CO2 selectivity, without affecting overall ethylene yield.
Catalyst testing indicated that the developed catalyst can realise 50% ethylene yield, with 90% selectivity and 55% conversion at 450°C. This represents a significant improvement compared to CL-ODH catalysts described in the literature that can achieve similar yields only at temperatures as high as 850°C.
This paper has an Extended Abstract file available; you must purchase the conference proceedings to access it.
Do you already own this?
Log In for instructions on accessing this content.
|AIChE Graduate Student Members||Free|
|AIChE Undergraduate Student Members||Free|