Mem_Fac_Eng_OU_33_1_19.pdf 589 KB
鷲尾 誠一 Department of Machanical Engineering
高橋 智 Department of Machanical Engineering
井元 智可至 Kayaba Industry Co., Ltd.
吉田 篤正 Department of Machanical Engineering
The present paper deals with measurements of the diffusion coefficients as well as the saturated solubilities of single component gases such as N(2), O(2) and CO(2) to a mineral oil. The method to determine the diffusivity is based upon measuring the pressure changes caused by the one-dimensional diffusion between the gas and the oil enclosed in an airtight container. For N(2) and O(2) the profiles of the measured pressure changes agree well with those predicted by diffusion theory, whereas that is not the case with CO(2). Although the reason why CO(2) does not seem to obey diffusion theory has yet to be studied, it may suggest the possibility that the diffusion coefficient varies with the pressure, considering that the range of pressure change in the diffusivity measurement was much obtained by this method fell within ±30% around the average. Moreover the solubility measurements have made clear that Henry's law holds true between the three pure gases and the oils tested, and that O(2) and CO(2) dissolve into the oil approximately two and ten times more, respectively, than N(2).
Memoirs of the Faculty of Engineering, Okayama University
Faculty of Engineering, Okayama University
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