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Thermal regeneration of amines in vertical, inclined and oscillating CO2 packed-bed strippers for offshore floating applications
International Journal of Greenhouse Gas Control ( IF 3.9 ) Pub Date : 2018-05-26 , DOI: 10.1016/j.ijggc.2018.05.008
Ion Iliuta , Faïçal Larachi

CO2-monoethanolamine desorption process performance was studied for standard vertical, static inclined, and symmetric/asymmetric oscillating packed-bed columns via a dynamic three-dimensional model which links the macroscopic volume-averaged continuity, momentum, energy and species balance equations in the liquid and gas phases with the purpose to describe the stripping packed-bed columns aboard floating production, storage and offloading platforms. CO2 thermal desorption process is negatively impacted in static inclined and asymmetric oscillating packed-bed columns because of secondary liquid flow, generated by the buoyancy force in the radial and tangential directions, and its consequence on two-phase flow hydrodynamics and temperature fields. The continual variation of the extent of reverse secondary flow in symmetric oscillating packed-bed columns induces a symmetrical oscillatory two-phase flow follows by time-dependent waves for thermal fields and CO2 thermal desorption performance in the vicinity of the standard vertical stripper steady-state solution. Operation with extra heat allows to obtain higher CO2 desorption rates and avoids the deterioration of CO2 desorption performance in static inclined and asymmetric oscillating packed-bed columns. The extra heat is considerable when the inclined and asymmetric oscillating packed-bed columns are operated at elevated reboiler heat duty in the vertical state.



中文翻译:

垂直,倾斜和振荡式CO 2填充床汽提塔中胺的热再生,用于海上漂浮应用

通过动态三维模型将标准的垂直,静态倾斜和对称/不对称振荡填充床塔的CO 2-单乙醇胺解吸过程性能进行了研究,该模型将宏观体积平均的连续性,动量,能量和物种平衡方程式联系起来。液相和气相,目的是描述浮式生产,储存和卸载平台上的汽提填充床塔。一氧化碳2由于在径向和切线方向上的浮力产生的二次液体流动,热解吸过程在静态倾斜和非对称振荡的填充床塔中受到负面影响,并且其对两相流流体动力学和温度场产生了影响。对称振荡填充床塔中逆向二次流程度的连续变化会引起对称的振荡两相流,随后是标准立式汽提塔附近的热场和CO 2热脱附性能随时间变化的波。状态解决方案。在额外的热量下运行可实现更高的CO 2解吸速率,并避免CO 2变质静态倾斜和非对称振荡填充床色谱柱的解吸性能。当倾斜的和不对称的振荡填充床塔在垂直状态下以较高的再沸器热负荷运行时,额外的热量是相当大的。

更新日期:2018-05-26
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