Hydrodynamic and mass transfer in a new co-current two-phase flow gas-liquid contactor
Hydrodynamic and mass transfer in a new co-current two-phase flow gas-liquid contactor
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DOI：
10.1016/j.cej.2006.12.004
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发表时间：
2007-07
影响因子：
15.1
通讯作者：
C. Sanchez;A. Couvert;A. Laplanche;C. Renner
中科院分区：
文献类型：
--
作者：
C. Sanchez;A. Couvert;A. Laplanche;C. Renner
这项工作展示了一种名为 CoReC 的新型气液反应器的流体动力学和传质性能。与填料塔 (PT) 等具有气体连续相的传统气液接触器相比，CoReC 具有小型设备的优势。进行实验以量化表观气体速度和液体速度分别从 5.6 到 28ms−1 和 0.016 到 0.055ms−1 变化的压降 ΔP、体积界面面积 a 和液体侧传质系数（kLa 和 kL）。测试了不同的流动配置（垂直向上（VU）、垂直向下（VD）和水平（H））。结果与先前针对 Lightnin SM 的研究结果进行了比较。 CoReC 内部的压降 ΔP（范围从 500 到 20,000Pam−1）低于经典 SM 产生的压降。体积界面面积a和传质系数kLa分别达到2800m2m−3和0.22s−1，高于SM中的测量值，并且远优于PT中的测量值。此外，事实证明，流量配置是一个需要考虑的重要参数。与 VU 和 H 配置相比，VD 配置似乎是最经济上可接受的，具有有利的界面面积、高传质系数和最低的压降。
This work presents hydrodynamic and mass transfer performances of a new gas–liquid reactor, named CoReC. Compared to conventional gas–liquid contactors with a gas continuous phase like packed towers (PT), the CoReC presents the advantage to be a small sized device. Experiments were carried out to quantify pressure drop ΔP, volumetric interfacial area a, and liquid side mass transfer coefficients (kLa and kL) for superficial gas and liquid velocities varying from 5.6 to 28ms−1and 0.016 to 0.055ms−1, respectively. Different flow configurations (vertical upward (VU), vertical downward (VD) and horizontal (H)) were tested. The results were compared to a previous study lead on Lightnin SM. Pressure drop ΔP inside the CoReC, ranging from 500 up to 20,000Pam−1, was found lower than the one generated by classical SM. Volumetric interfacial area a and mass transfer coefficient kLa, respectively reaching values of 2800m2m−3and 0.22s−1, were found higher than those encountered in SM, and far better than those measured in PT. Moreover, it has been shown that the flow configuration is an important parameter to take into account. VD configuration appeared to be the most economically acceptable with advantageous interfacial areas, high mass transfer coefficients and the lowest pressure drops if compared to VU and H configurations.