利用膜气液接触器制备了纳米CaCO3、SrCO3、Al(OH)3和Al2O3粒子,根据气液反应理论预测了Ca(OH)2浓度、CO2分压等对CO2吸收速率的影响规律,并得到了实验验证,在实验条件下,Ca(OH)2浓度和CO2分压对CaCO3粒子的形貌影响较小,粒径约为70 nm.添加PVP和PEG后,粒度降为48 nm左右,分散性明显提高.所得SrCO3纳米粒子为球形,粒度均匀,Sr(OH)2浓度对粒子粒度具有明显影响.Al(OH)3粒子为球形,50 nm左右,煅烧后得到Al2O3,粒子尺寸增加至70 nm左右.反应后用稀盐酸清洗膜使之再生,膜重复使用9次,膜传质系数未见明显降低.
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