摘要
利用恒温压力搜索法在277．15～295．49K温度范围内测量了3组含R-134a混合气体生成水合物的相平衡条件，结果表明在实验温度范圊内R-134a显著降低甲烷和氢气形成水合物的压力；对其中一组数据采用Parrish-Prausnitz模型进行了相平衡预测计算，并修正了该奈件下的Langmuir经验常数，修正前后模型计算的最大压力误差分别为25．6％和4．11％，表明经验参数的修正改进了预测结果。
The hydrate formation conditions of the R-134a mixtures were measured in a temperature range of 277.15- 295.49 K, and the equilibrium were carried out by using a transparent sapphire cell equipped with magnetic stirring and data acquisition system by isothermal pressure search method. The equilibrium resuhs indicated that the equilibrium pressures of the gas mixture of R-134a and methane were lower （〉 3 MPa） than that of pure methane at the same temperature range and R-134a can promote the hydrate formation of the gas mixtures more effectively than propane. The Parrish-Prausnitz model with modified Langrnuir constant gave a maximum relative deviation of the pressure of 4.11% , much lower than that of 25.6% predieted by the original model.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2006年第1期115-118,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(90410003)
"973"子课题(G2000026306)
