Alkanes, alkenes and aromatics: the oxidative dehydrogenation of n-octane using iron molybdate catalysts

Yeo, Benjamin Roy 2014. Alkanes, alkenes and aromatics: the oxidative dehydrogenation of n-octane using iron molybdate catalysts. PhD Thesis, Cardiff University. Item availability restricted.

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Abstract

The oxidative dehydrogenation (ODH) of n-octane to produce octene at atmospheric pressure has been studied using an industrially supplied iron molybdate catalyst from Johnson Matthey (JM). In situ X-ray diffraction studies revealed at temperatures ≥450 °C the catalyst undergoes a reductive phase transition when reacted with noctane at 450 °C where the phase changes from Fe2(MoO4)3-MoO3 to FeMoO4-MoO2-Mo4O11. As a result, if the temperature is taken back below this point the catalyst does not revert to the original phase and therefore the same activity and selectivity cannot be achieved. Thus the system can be considered as two different catalysts: i)the oxidised phases at temperatures < 450 °C, Fe2(MoO4)3-MoO3, which is associated with the production of octene and COx, and ii) as the reduced phases at temperatures ≥

Item Type:	Thesis (PhD)
Status:	Unpublished
Schools:	Chemistry
Subjects:	Q Science > QD Chemistry
Funders:	EPSRC
Date of First Compliant Deposit:	30 March 2016
Last Modified:	23 Sep 2018 01:30
URI:	https://orca.cardiff.ac.uk/id/eprint/76035

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