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提出了一种由粗孔硅胶和氯化镁制成的新型复合吸附剂,分析了不同配制参数对复合吸附剂吸附性能的影响。实验表明:第一种配制参数下配制的复合吸附剂在平均温度29℃,相对湿度76.1%的条件下平衡吸附量和吸附速率随着MgCl2溶液浓度的升高而升高,其中Mg7的平衡吸附量是粗孔硅胶(Mg0)的2.95倍,Mg7在开始后62h的吸附量已经超过了Mg0的平衡吸附量,并在90℃下经过35h脱附,吸附量的90%以上都已经脱附,其中Mg7的脱附量是Mg0的2.98倍。第二种配制参数下配制的复合吸附剂在平均温度30.7℃,相对湿度75.4%的条件下测试了120h,结果表明吸附量随着浸泡时间的增加而增加。因此,在配制复合吸附剂时,MgCl2溶液浓度、浸泡时间会影响复合吸附剂中MgCl2的含量,从而影响复合吸附剂的吸附特性。
A new composite adsorbent made of coarse-grained silica gel and magnesium chloride was proposed. The effects of different formulation parameters on the adsorption properties of the composite adsorbent were analyzed. The experimental results showed that the equilibrium adsorption capacity and adsorption rate of the composite adsorbent prepared under the first formulation parameters increased with the increase of the concentration of MgCl2 solution at an average temperature of 29 ℃ and a relative humidity of 76.1%. The equilibrium adsorption of Mg7 The amount of Mg7 was 2.95 times that of the crude silica gel (Mg0). The adsorption amount of Mg7 exceeded the equilibrium adsorption amount of Mg0 at 62h and desorbed at 90 ℃ for 35h, and more than 90% of the adsorption amount had been desorbed. The desorption amount of Mg7 is 2.98 times that of Mg0. The composite adsorbent prepared under the second formulation parameters was tested under the conditions of an average temperature of 30.7 ° C and a relative humidity of 75.4% for 120 hours. The results showed that the adsorption amount increased with the soaking time. Therefore, in the preparation of composite adsorbents, the concentration of MgCl2 solution, soaking time will affect the content of MgCl2 in the composite adsorbent, thus affecting the adsorption characteristics of the composite adsorbent.