Reduction kinetics and catalytic activity of VO x /γ-Al 2 O 3 -ZrO 2 for gas phase oxygen free ODH of ethane
作者： AbdAlwadood H Elbadawi , Mohammed S Ba-Shammakh , Sameer Al-Ghamdi , Shaikh A Razzak , Mohammad M Hossain
DOI: 10.1016/J.CEJ.2015.08.048
关键词:
摘要: Abstract Oxidative dehydrogenation (ODH) of ethane is investigated using VO x /Al 2 O 3 -ZrO catalysts in absence gas phase oxygen under circulating fluidized conditions. In this approach, the catalyst particles also serve as a source lattice oxygen. The fluidizable are prepared with various amount successive impregnation technique. XRF measurement confirms consistency between targeted and actual metal loading. Nitrogen adsorption shows type-v monolayer on surface. XRD Raman confirm presence species Al crystal phase. NH -TPD that acidity decreases slightly stable over repeated reduction (TPR) oxidation (TPO) cycles. TPR kinetics modeling reveals activation energy (oxygen release) increases increasing This an indication difficulties at higher ODH experiments established CREC-riser simulator different temperatures (525–600 °C) reaction times (20–50 s). Approximately, 89% ethylene selectivity achieved 10% . remains regeneration
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