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首页> 外文期刊>Crystal growth & design >Potential of Osmotic Membrane Crystallization Using Dense Membranes for Na2CO3 Production in a CO2 Capture Scenario
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Potential of Osmotic Membrane Crystallization Using Dense Membranes for Na2CO3 Production in a CO2 Capture Scenario

机译：在CO2捕获场景中使用致密膜生产Na2CO3的渗透膜结晶的潜力

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The potential of a membrane crystallizer equipped with a BW-30 reverse osmosis membrane has been investigated for recovering Na2CO3 from aqueous streams, targeting its application in CO2 mitigation. The effect of various crystallization conditions, such as the concentration of the osmotic solution, the concentration of the Na2CO3 solution, as well as membrane orientations on the process performance has been systematically determined. This dense membrane crystallizer was thought to be better than the membrane contactor applied in previous work due to its higher water flux, marked as 0.210 L.m(-2).h(-1) in forward osmosis (FO) mode and 0.164 L.m(-2).h(-1) in pressure retard osmosis (PRO) mode compared with 0.08 L.m(-2).h(-1) for the membrane contactor. Compared with the PRO mode, the FO mode was found to be a better alternative with higher water permeability and draw solute rejection. The concentration of the osmotic solution was the key parameter to condition the applicability of this system. The long-term operation of the system can be realized without any membrane damage and fouling. In addition, Na2CO3.10H(2)O crystals were obtained with a superhigh purity of 99.98%. Therefore, this osmotic crystallizer equipped with a dense membrane was proven to be an effective alternative for Na2CO3 crystallization for the application in CO2 capture process.
机译：已经研究了装备有BW-30反渗透膜的膜结晶器从水流中回收Na2CO3的潜力，目标是将其应用于减少CO2的应用。已经系统地确定了各种结晶条件的影响，例如渗透溶液的浓度，Na2CO3溶液的浓度以及膜取向对工艺性能的影响。人们认为这种致密的膜结晶器比以前的工作中使用的膜接触器更好，因为它的水通量更高，在正向渗透（FO）模式下标记为0.210 Lm（-2）.h（-1），在0.164 Lm（- 2）.h（-1）在压力渗透（PRO）模式下与膜接触器的0.08 Lm（-2）.h（-1）相比。与PRO模式相比，FO模式被认为是更好的替代方法，具有更高的透水性和吸引溶质。渗透溶液的浓度是调节该系统适用性的关键参数。可以实现系统的长期运行，而不会造成膜损坏和结垢。此外，获得了Na2CO3.10H（2）O晶体，具有99.98％的超高纯度。因此，这种具有致密膜的渗透结晶器被证明是Na2CO3结晶的有效替代品，可用于CO2捕集过程。

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