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OALib Journal期刊
ISSN: 2333-9721
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多孔陶瓷膜的气体渗透模型
DOI: 10.3969/j.issn.1671-7627.2013.04.010, PP. 48-52
Keywords: 陶瓷膜,渗透性能,气体渗透
Abstract:
为了揭示气体在多孔陶瓷膜中的传质规律,研究陶瓷膜在20～500℃下的n2渗透性能。实验测定了平均孔径为100、200和500nm的陶瓷膜渗透速率;在达西定律的基础上,分别依据k-c方程和h-p方程建立气体传质模型,修正相关参数并进行比较和预测。结果表明:在考察的膜孔径范围内,气体的传质机制主要为黏性流扩散,气体的渗透速率随温度的升高而减小,随膜平均孔径和孔隙率的增大而增大,随膜厚度的增加而减小,修正的k-c方程能较好地描述n2在陶瓷膜孔中的传递规律。
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