Experimental study of Ammonia-Methane mixture combustion in the micro gas turbine combustor

To achieve the zero carbon emissions goal, it is of great importance to replace conventional hydrocarbon fuels with carbon-free fuels. In terms of carbon-free fuel, ammonia has several advantages over hydrogen, despite of problems such as low flame speed and high NOx emission. The present experimental study investigates the effect of adding ammonia to methane and its ratio on the combustion performance of a can-type micro-turbine combustion chamber under atmospheric condition at two different heat powers. The results show that with an increase in the percentage of ammonia in the fuel mixture, maximum flame temperature has decreased and combustion has delayed until the end of chamber. Also, the addition of ammonia, despite not reducing CO, results in a sharp increase in the NOx production. In addition, although the outlet temperature of the chamber has not changed much except for one condition, combustion efficiency of the chamber has decreased with the increase of ammonia ratio, and pattern factor is more than the case of pure natural gas. Therefore, although the use of methane/ammonia fuel mixture with stable combustion conditions in the existing chamber is possible, it requires modifications to achieve optimal combustion performance.a
 
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