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采用“时间滞后”法测定了乙炔、水蒸气在聚砜膜中的渗透系数、扩散系数和溶解度系数,结果表明乙炔在膜中的渗透符合双方式模型,渗透活化能为负值;水蒸气在膜中的渗透行为比较特殊,存在溶胀和成簇迁移,渗透活化能为正值;乙炔在膜中的扩散系数和溶解度系数均比水蒸气小。聚砜膜中H2O/C2H2选择性在300以上。 相似文献
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金属化聚丙烯薄膜交流电容器,正在逐步取代油浸纸介电容器,在交流电动机启动,交流电动机运转、照明和功率因数补偿等领域,得到广泛的应用。交流金属化电容器的质量与生产工艺相关连,但是,我厂以前一直沿用直流电容器 相似文献
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针对纺织印染厂排放的含聚乙烯醇退浆废水,采用中空纤维膜组件,利用超滤法对其进行处理。研究了运行时间对渗透通量的影响、膜两侧的压差、料液的温度及料液的流速对渗透通量及截留率的影响.结果表明,采用超滤法处理聚乙烯醇废水技术可靠,操作方便,经济可行,具有很好的环境效益和经济效益。 相似文献
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The residue curve maps are considered as a powerful tool for the preliminary design of reactive distillation. The residue curve maps of ethyl acetate synthesis reaction were calculated based on the pseudo-homogeneous rate-based kinetic model and the NRTL activity coefficient model. The results show that the unstable node branch emerges from the ethyl acetate/water edge, moving toward the chemical equilibrium surface with the increase of Damk ler value (D), and the node reaches the ternary reactive azeotrope when D→∞ eventually. Conceptual design for the ethyl acetate synthesis of reactive distillation based on the residue curve maps is presented at last. 相似文献