A novel structured packing, the 4D packing, has been characterized in terms of hydrodynamics, effective area and gas side mass transfer coefficient. The increase of the 4D opening fraction allows to reduce pressure drop and to get a better capacity than Mellapak 500Y and 750Y, for which the geometric areas are similar. The 50% open 4D packing, 4D-50%, leads to effective areas which are higher than Mellapak 500Y ones, and doubled compared with Mellapak Plus 252Y ones. Effective areas for the 4D do not decrease when the opening fraction increases from 30 to 50%, this indicates that a non-negligible amount of droplets is generated at 50%. Gas side mass transfer coefficient had been measured with an original experimental method: water evaporation. Corresponding results seem to be in agreement with the literature, and with the fact that a large amount of droplets is generated. Correlations are proposed for both effective area and gas side mass transfer coefficient for the 4D-50%.The 4D-50% packing could be very interesting for post-combustion CO2 capture since it generates low pressure drop and a very high interfacial area. This will be further confirmed by an economic study for which the absorber plant will be designed with a rate based model.udud
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机译：新型结构填料，即4D填料，具有流体动力学，有效面积和气体侧传质系数的特点。与几何面积相似的Mellapak 500Y和750Y相比，增加4D开孔率可以减少压降并获得更好的容量。 50％的开放式4D包装，4D-50％的有效面积比Mellapak 500Y的有效面积高，并且是Mellapak Plus 252Y的两倍。当开口率从30％增加到50％时，4D的有效面积不会减少，这表明在50％时会产生不可忽略的液滴数量。气体侧传质系数已通过原始实验方法测量：水蒸发。相应的结果似乎与文献相符，并且与产生大量液滴的事实相符。对于4D-50％的有效面积和气体侧传质系数都提出了相关性。4D-50％填充对于燃烧后的CO2捕集可能非常有趣，因为它产生的压降低且界面面积很大。这将通过一项经济研究得到进一步证实，该经济研究将为吸收器工厂设计基于速率的模型。 ud ud
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