XIONG Xiaojun, LIN Wensheng. Calculation of CO2 frost point temperature in CH4+CO2+N2/C2H6 ternary mixtures[J]. CIESC Journal, 2015, (S2): 30-39. DOI: 10.11949/j.issn.0438-1157.20151069.
XIONG Xiaojun, LIN Wensheng. Calculation of CO2 frost point temperature in CH4+CO2+N2/C2H6 ternary mixtures[J]. CIESC Journal, 2015, (S2): 30-39. DOI: 10.11949/j.issn.0438-1157.20151069.DOI:
When natural gas encounters low temperature processes
CO2 in natural gas mixtures easily forms into frost and causes plugging problems
so it is necessary to predict the frost point temperature of CO2 in natural gas mixtures.This paper employs three different methods to calculate the frost point temperature of CO2 in CH4+CO2+N2/C2H6 ternary mixtures.The first method is to build fugacity balance model based PR equation of state.The second method is to establish pressure balance model based Dalton's law of partial pressure.And the third method is using HYSYS software.The results by three different methods are all found to be in good agreement with the experimental results.Moreover
the comparison results of three methods show that the method by PR equation of state has the highest accuracy and the method by Dalton's law of partial pressure has the lowest accuracy.Despite that the method by Dalton's law of partial pressure is not as precise as the other two methods
it can be used for fast prediction in engineering because it is simple to calculate and achieve satisfactory precision.