The results show that VLE estimation method with MWS mixing rule based on PR equation is generally better than those with WS mixing rule.MWS mixing rule can be applied widely in engineering practice.

• 结果表明，采用PR方程结合MWS型混合规则预测汽液平衡结果一般优于WS型混合规则，能广泛应用于工程实践。