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Role ofmembrane in concentrate of oxygen: Experimental study of thermal efficiency of combustion process by concentrated oxygen

Farshad Farahbod, Sara Farahmand, Narges Bagheri, Shoaib Memar Bashi

The effect of oxygen concentration on performance of combustion process with basic fuels such as methane, ethane and propane is evaluated in this paper. Different concentrations of oxygen are provided by membrane and injected in to combustion chamber. The flame temperature, combustion thermal efficiency, x NO emissions in different torques, the amount of exhaust unburned carbon and the amount of saved fuel gas are investigated in different oxygen concentration.Also, the mole fraction of exhaust basics such as; 2 O ,OH , 2 H , H , O and 2 HO from combustion chamber are measured for precious evaluation of this process. In addition, the effluent side components such as; N O 2 , N , HCO , 2 NH , 3 NH and HCN are surveyed in this paper. Experiments show that the highest flame temperature is caused by Propane burning in 60% oxygen concentration however this phenomenon produces higher thermal x NO .Also, the highest thermal efficiency is about 38.3% by burning methane fuel in 21% oxygen volume percentage. Experiments indicate that there is an optimum amount of engine speed accompanied with oxygen concentration to increase the thermal efficiency and decrease the amount of unburned carbon. Obtained results in this paper were used to determine optimal control points in the burner design stage.