排序方式: 共有14条查询结果,搜索用时 187 毫秒
1.
2.
3.
作者将最近十余年来发展的四种活度系数模型(Wilson、NRTL、McCann和UNIFAC)与维里方程及三对角矩阵法相结合,成功地应用于各类非理想溶液精馏过程的严格计算。所编的NIDISTL精馏计算程序曾先后对33个精馏系统进行过百余次考核运算。 为对这些活度系数模型作一平行的比较,本文选取了18组二元汽-液平衡实验数据,用非线性最小二乘法分别确定Wilson、NRTL和McCann方程中各对二元参数值。所得参数值被应用于预测18组二元系和8组由此导出的多元系泡点汽-液平衡数据,并与UNIFAC官能团模型的预测结果及实验数据作比较。 通过四个精馏计算的示例,可以说明采用下同活度系数模型时的收敛特性和计算结果是一致的。本文对各模型所算得的温度、流量和组成分布作了比较,并就某些情况下可能出现较大偏离的原因进行了讨论。 相似文献
4.
5.
本文(三)详细介绍了应用Prausnitz-Wilson模型进行精馏计算之公式、方法及计算程序。 相似文献
6.
7.
8.
9.
Four well-known activity coefficient models (Wilson,NRTL,McCann and UNIFAC),coupled withvirial equation and tridiagonal matrix method,have been applied to the vigorous computation of variousnon-ideal distillation processes.The NIDISTL program developed by authors has been tested for 33 distil-lation systems,with more than one hundred calculations performed.18 sets of binary vapor-liquid equilibrium data were chosen for the parallel comparison of these activ-ity coefficient models,each set was fitted to Wilson,NRTL,and McCann equations respectively by us-ing nonlinear least square technique.The binary parameters so determined were used to predict the bubblepoint equilibrium data of 18 binary and 8 derived multicomponent systems.The predictions of four mod-els were compared with experimental data.Five examples were presented to illustrate the consistency of distillation calculation results using dif-ferent coefficient models. 相似文献
10.