CAJ | 학술논문

活化碳酸钾溶液吸收法是实现燃煤电厂烟气中 CO2大规模捕集的颇具潜力的减排技术之一。文中采用停流光谱-pH 指示剂技术和气液接触式湿壁柱实验装置考察了硼酸盐对 CO2水合的活化效应及其对碳酸钾溶液吸收 CO2的影响。研究结果表明：硼酸盐可以活化CO2转化为HCO3-，其活化机制类似于碳酸酐酶催化 CO2水合机制；在碳酸钾溶液中加入硼酸盐可以明显提高 CO2在溶液中的富集速率和吸收过程的增强因子。考虑离子强度的影响，在液膜控制条件下，文中建立的基于液相硼活化机制的模型可以很好的预测硼酸盐活化的碳酸钾法对 CO2的实际吸收效果，为工艺过程设计和操作条件优化提供借鉴参考。
활화탄산갑용액흡수법시실현연매전엄연기중 CO2대규모포집적파구잠력적감배기술지일。문중채용정류광보-pH 지시제기술화기액접촉식습벽주실험장치고찰료붕산염대 CO2수합적활화효응급기대탄산갑용액흡수 CO2적영향。연구결과표명：붕산염가이활화CO2전화위HCO3-，기활화궤제유사우탄산항매최화 CO2수합궤제；재탄산갑용액중가입붕산염가이명현제고 CO2재용액중적부집속솔화흡수과정적증강인자。고필리자강도적영향，재액막공제조건하，문중건립적기우액상붕활화궤제적모형가이흔호적예측붕산염활화적탄산갑법대 CO2적실제흡수효과，위공예과정설계화조작조건우화제공차감삼고。
Promoted potassium carbonate solutions have the potential for large-scale CO2 capture from coal-based power stations. In this paper, the borate-catalyzed CO2 hydration and its effect on potassium carbonate solutions using stopped-flow pH indicator technique and wetted-wall column method was presented. The results show that borate can catalyze the conversion of CO2 into HCO3- via the same fundamental mechanism as the enzyme carbonic anhydrase, and the addition of borate into potassium carbonate solution increases CO2 absorption rate and enhancement factor. Under the condition of liquid-film controlled processes and ion strength effect Considered, the proposed borate catalysis can be used to predict CO2 absorption of borate promoted potassium carbonate solutions well, and will be very useful for separation processes design and operation parameters optimization.