Adaptability Analysis of Natural Gas State Equation with Different Ammonia Ratios
Mixing natural gas with ammonia as a fuel can improve the poor combustion reactivity,narrow flame limit,and high ignition temperature of ammonia as a fuel.On the other hand,it can reduce the carbon emission intensity during the natural gas utilization process,reduce costs and emissions,and ensure the safety of gas supply.The reasonable selection of the state equation during the research process is the key to the reliability of the results.This article compares the optimization process of the state equation in the physical property calculation process of natural gas and ammonia with different mixing ratios under different operating conditions.The results indicate that within the pressure range of 1～12 MPa and the temperature range of 5～30 ℃,after comprehensive comparative analysis,it was found that the BWRS equation of state is the optimal choice for pure natural gas and natural gas mixed with low amounts of ammonia,while the SRK equation is the optimal choice for natural gas with higher mixing ratios(mixed with 10％ammonia).
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