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Thermodynamic equilibrium analysis on oxidative dehydrogenation of propane using CO2: Finding a suitable reactant ratio for propylene formation

Authors : Gyanesh Kumar a, Aishanee Pattnaik b, Saksham Sehgal b, Koustuv Ray *a and Dharmendra Pandey *b


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Abstract

Thermodynamic equilibrium analysis has been employed to propose a suitable reactant ratio for propylene formation from oxidative dehydrogenation of propane reaction. The reactants and products were modelled in RGibbs reactor to understand the effect of temperature, addition of carbon dioxide and inert molecules on top of equimolar feed between propane and CO2. The desired product propylene is formed along with other undesired products like CO over a broad range of temperature. The formation of propylene is significantly affected by CO forming side reactions such as reverse water gas shift and dry reforming of propane which are endothermic in nature. The reactant stream with equimolar CO2 and propane appears to be the most favourable for propylene formation. The higher operating temperature should be avoided to minimize CO and maximize propylene formation.

Keyword

CO2, propane, oxidative dehydrogenation, propylene, reactant ratio