Microreactors have been demonstrated to become an effective tool for increasing mass and heat transfer in heterogeneous chemical processes that are unachievable in batch or continuous stirred tank reactors. The key to superior performance is the availability of a large specific surface area (A/V) in the microsystem for mass and heat transfer between phases. Among the flow patterns generated in the two-phase liquid-liquid flow, slug is an ideal flow with a high stability characteristic, regular velocity, and uniform dimension throughout a microchannel system. The flow behavior gives slugs great potential to increase mass and heat transfer between phases, so optimizing the utilization of microreactors in many chemical process applications needs an in-depth understanding of the liquid-liquid hydrodynamic. Therefore, the current work aims to determine The experiments were performed in 1 mm (ID) circular PTFE and silicone tubes, with a 30–40 ml/hour flow rate, and sodium hydroxide concentrations of 0.1, 0.13, and 0.15 M were used. The results exhibit that the most prominent overall mass transfer coefficient was 0.121/s, attained at 0.15 M sodium hydroxide concentration, with 40 ml/hour total discharge within the silicone channel. .

中文翻译：

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圆形微通道内液-液段塞流下部分互溶液体的传质现象

微反应器已被证明成为在非均相化学过程中增加传质和传热的有效工具，而这在间歇式或连续搅拌釜反应器中是无法实现的。卓越性能的关键是微系统中具有大的比表面积 (A/V)，用于相间的传质和传热。在液-液两相流产生的流型中，段塞流是一种理想的流动，在整个微通道系统中具有高稳定性、规则的速度和均匀的尺寸。段塞的流动行为赋予了段塞在增加相间传质和传热方面的巨大潜力，因此在许多化学工艺应用中优化微反应器的利用需要对液-液流体动力学有深入的了解。因此，当前的工作旨在确定实验在1 mm（ID）圆形PTFE和硅胶管中进行，流速为30-40 ml/小时，使用的氢氧化钠浓度为0.1、0.13和0.15 M。结果表明，最显着的总体传质系数为 0.121/s，在 0.15 M 氢氧化钠浓度下达到，硅树脂通道内的总排放量为 40 毫升/小时。 。