高校化学工程学报Issue(5)：1252-1258,7.DOI:10.3969/j.issn.1003-9015.2015.05.033
多相体系蜡晶析出热力学预测模型
Thermodynamic Prediction Model of Wax Precipitation in Multiphase Systems
摘要
Abstract
Thermodynamic condition changes in oil and gas transportation pipeline can lead to the deposition of heavy components of the system on pipe walls, especially for deep-water systems with low temperature and high pressure, which results in pipeline blockage. The UNIQUAC model and state equation were used to establish the thermodynamic model for wax deposition. Liquid phase fugacity in vapor-liquid equilibrium and liquid-solid equilibrium, solid-solid transition, thermodynamic properties of pure components, Poynting correction term and activity coefficient were taken into account in model establishment. The binary interaction parameter (0.0296) between the light and heavy components was determined through inverse computation of the vapor-liquid equilibrium and liquid-solid phase equilibrium data. This established model was used to calculate wax appearance temperature of six mixture systems, and the calculation results show that the model results using pressure as a parameter are consistent with the experimental results, and the absolute prediction error is less than 2.40 K and the relative error is less than 0.77%.关键词
多相体系/蜡/热力学模型/相平衡Key words
multiphase system/wax/thermodynamic model/phase equilibrium分类
能源科技引用本文复制引用
曹学文,杨文,马玉鹏,郭悠悠..多相体系蜡晶析出热力学预测模型[J].高校化学工程学报,2015,(5):1252-1258,7.基金项目
国家自然科学基金(51274232)；国家自然科学基金青年基金(51406240)。 （51274232）
