Critical points of mixtures of ethylene and polyethylene wax under high pressure

被引:7
|
作者
Heukelbach, D [1 ]
Luft, G [1 ]
机构
[1] Darmstadt Univ Technol, Inst Chem Engn, D-64287 Darmstadt, Germany
关键词
equation of state; high pressure; mixture; ethylene; polyethylene wax;
D O I
10.1016/S0378-3812(98)00225-8
中图分类号
O414.1 [热力学];
学科分类号
摘要
Critical points of systems of ethylene with different polyethylene wax mixtures have been measured in the temperature range 413 to 513 K and at pressures up to 93 MPa. The results show a distinct influence of the polydispersity of the polyethylene wax on the critical point. A methodology for evaluating critical points of mixtures of ethylene and polydisperse polyethylene wax with a cubic equation of state and the Wong-Sandler mixing rule is proposed. We find that this method is able to predict critical points with good accuracy over a wide range of polydispersity. For industrial calculations it is advantageous to have a simple model with a limited number of parameters. This method applicates simple cubic equations of state to mixtures under high pressure. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:187 / 195
页数:9
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