The oxygen diffusion coefficient in air measured by this method corresponded with data in the literature within 卤6% deviation. The oxygen diffusion coefficients of two kinds of porous media generally used for the GDL were measured by the experimental method for dry and wet samples. The results ...
Even though the reaction by-product from the fuel cell is water, the membranes are most often kept hydrated by humidifying the inlet hydrogen and/or air gas streams. The proton conductivity measured in Siemens per centimeter (S cm−1) for a 3M ionomer with an equivalent weight (EW) of ...
Mixed ionic and electronic conductors (MIEC) have presented great economical and environmental interests for these last years because of their potential applications for electrode materials in solid oxide fuel cell and for oxygen separation form air such as in catalytic membrane reactors for methane conv...
Solubility of oxygen in glucose solutions S.A.M. van Stroe-...,A.P.M. Janssen,L.J.J. Janssen - 《Analytica Chimica Acta》 - 1993 - 被引量: 23 Measurement of Diffusion Coefficients of Air in Silicone Oil and in Hydraulic...
Virial coefficients of nitrogen, oxygen, and air at temperatures from 75 to 2500°k 来自 国家科技图书文献中心 喜欢 0 阅读量: 29 作者: RM Sevast'Yanov,RA Chernyavskaya 摘要: The second and third virial coefficients are calculated for the (12-7, δ) model pair potential. With their ...
Oxygen is a colourless gas that exists in large quantities in the air. All plants and animals need oxygen in order to live. e.g. The human brain needs to be without oxygen for only four minutes before permanent damage occurs. 人的大脑缺氧4分钟后便会造成永久性损伤。
The oxygen transfer in conventional HFCW is poor and inconsistent, which occurs mainly via convection and diffusion from the air to the surface water with estimated oxygen transfer rates of 0.3–3.2 g O2 m−2 d−1 (Kadlec and Wallace, 2009). The conventional VFCW allows oxygen transfer ...
From the IGA data we can diffusion coefficient, Da, to be estimate the in the range air 10 À(870–%10NÀ29acnmd22s0À%1Ofo2r) the CH3NH3PbI3 perovskite material (calculations provided in SI). This value is comparable to the fast diffusion of gases into polymer thin films where, ...
1) diffusion coefficient of oxygen 氧气扩散系数1. The law on diffusion coefficient of oxygen influenced by constructive method . 为了确定施工方法与钢筋位置对混凝土氧气扩散系数的影响规律,应用中国矿业大学耿欧教授的混凝土氧气扩散系数测试装置,在不同温湿度和水灰比的条件下,对钢筋混凝土的上保护层和下保护...
In the latter case, nitrogen plays certainly the role of an oxidation inhibitor as it works as a barrier to diffusion. In this paper, we also have determined all the coefficient (activation energy and autodiffusion coefficient) to predict the thickness of the oxidized layer and diffused layer....