天然气技术与经济
天然氣技術與經濟
천연기기술여경제
Natural Gas Technology
2015年
1期
30-35,77
,共7页
孟凡超%李超%王亦修%吕书玲%王悦%马正飞
孟凡超%李超%王亦脩%呂書玲%王悅%馬正飛
맹범초%리초%왕역수%려서령%왕열%마정비
多组分气体%吸附平衡%预测%模型
多組分氣體%吸附平衡%預測%模型
다조분기체%흡부평형%예측%모형
multicomponent mixed-gas%adsorption equilibrium%predication%model
为解决由纯组分吸附平衡拟合结果预测多组分气体吸附平衡的问题,在纯组分模型构建时考虑吸附剂表面的不均一性提出了新的双位点吸附模型(Langmuir-Freundlich-Langmuir),将其吸附行为假设为两类不同吸附位共同作用的结果。在进行双组分的预测时考虑了两类位点的不同排布而导致的两种边界情况,对于每个体系的二元组分吸附平衡的预测都能够很好的满足其中的一种边界情况,三组分气体预测取得良好效果。另外从纯组分模型选取、多组分平衡预测的方程构建方面探讨了影响多组分预测精度的几个因素。
為解決由純組分吸附平衡擬閤結果預測多組分氣體吸附平衡的問題,在純組分模型構建時攷慮吸附劑錶麵的不均一性提齣瞭新的雙位點吸附模型(Langmuir-Freundlich-Langmuir),將其吸附行為假設為兩類不同吸附位共同作用的結果。在進行雙組分的預測時攷慮瞭兩類位點的不同排佈而導緻的兩種邊界情況,對于每箇體繫的二元組分吸附平衡的預測都能夠很好的滿足其中的一種邊界情況,三組分氣體預測取得良好效果。另外從純組分模型選取、多組分平衡預測的方程構建方麵探討瞭影響多組分預測精度的幾箇因素。
위해결유순조분흡부평형의합결과예측다조분기체흡부평형적문제,재순조분모형구건시고필흡부제표면적불균일성제출료신적쌍위점흡부모형(Langmuir-Freundlich-Langmuir),장기흡부행위가설위량류불동흡부위공동작용적결과。재진행쌍조분적예측시고필료량류위점적불동배포이도치적량충변계정황,대우매개체계적이원조분흡부평형적예측도능구흔호적만족기중적일충변계정황,삼조분기체예측취득량호효과。령외종순조분모형선취、다조분평형예측적방정구건방면탐토료영향다조분예측정도적궤개인소。
To solve the problem of adsorption equilibrium predication of multicomponent mixed-gases from the knowledge of adsorption isotherms for only single-component gases, a new model (Langmuir-Freundlich-Langmuir) considered the influence of adsorbent surface heterogeneity was developed for correlating the unary equilibria, which assumed that the adsorption behavior happened on two adsorption sites which were different from each other due to their different adsorption energy. In the predication of adsorption equilibria for the two-component mixed-gases, there were two boundary conditions caused by the different arrangement of two types of sites and only one case would turn out to be the correct correlation, and the prediction of adsorption equilibria for the three-component mixed-gas achieved good results. Several factors affecting the accuracy of prediction for the two-component mixed-gases were discussed from the selection of single-component model and the construction of multicomponent equilibrium prediction equation.