摘要
根据矩形管道流体速度的椭圆抛物曲面分布规律,设计成新的流动电解质电极装置,电极嵌在管道壁面中央.电极对管壁的宽度比度小于1/4,电极表面上方流体的速度差异小于6%.在这种情况下,流速分布基本上是均匀的,可以在层流或湍流的等传质条件下考察电极反应,设矩形面积为2mm×8mm,流体的速度在60cm/sec以下的雷诺数低于2000,为层流状态. 该电极系统已应用于暂态和稳态电化学测量.由于其容易排除附着在电极表面的气泡和固体产物,故比在旋转电极上所获得的数据更为可靠,该装置除了价格便宜且外操作方便,可作为电化学测量中的通用电解池和现场监测器.
According to the law of fluid velocity distribution of the elliptic paraboloid in rectangular conduit, wa have designed a new set-up of flowing electrolyte electrode. The electrode is embedded in the center of conduit wall. The ratio of the electrode width to the wall width is less than 1/4. In this case the velocity differences of fluid flowing over electrode surface is less than 6%, and the uniform velocity distrbution can be obtained. So it will be possible to examine electrode reaction under conditions of equal mass transfer with laminar or turbulent. If the rectangular area is equal to 2mm×8mm and the fluid velocity is below 60cm/sec, the Reynolds number (Re) is not more than 2000 and the flow is laminar.This electrode system has been used in transient and steady electrochemistry measurements. Because the adsorbed bubbles and the solid products rise on the electrode surface can be easily removed by flowing fluid, the data obtained from it are better than that from the rotating disk electrode concering the reliability. This set-up is very convenient to operation besides lower cost, and it can be used as a common cell for electrochemistry measurement as well as an in-situ monitor.
基金
国家自然科学基金
