空气取水用硅胶/MgCl_(2)复合吸附剂吸附性能研究  

Study on adsorption of silica gel/MgCl_(2)composites for air-water intake

作　　者：高娅洁 赵惠忠[1] 张斌斌 孙有改 张峰 GAO Ya-jie;ZHAO Hui-zhong;ZHANG Bin-bin;SUN You-gai;ZHANG Feng(Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学商船学院,上海201306

出　　处：《应用化工》2023年第2期376-381,388,共7页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(50976073);上海市教育委员会科研创新重点项目(13ZZ121)。

摘　　要：通过浸渍法合成了一种硅胶/MgCl_(2)新型复合材料。探究了球型硅胶孔径和粒径、MgCl_(2)溶液浓度、吸附环境温湿度对硅胶/MgCl_(2)复合吸附剂吸附性能的影响。实验表明,复合吸附剂的吸附能力与硅胶孔径成正比,与硅胶粒径成反比。在25℃、50%RH下,SG-A/M20、SG-B/M20、SG-C/M20的平衡吸附量分别为0.25,0.37,0.39 g/g;在25℃、35%RH下,SG-D/M20、SG-A/M20、SG-E/M20的平衡吸附量分别为0.21,0.16,0.14 g/g。RH为35%~80%时,复合吸附剂的吸附量随RH增大而增大,温度为25~35℃时,复合吸附剂的吸附量随温度升高先增大后减小。在25℃、RH 80%下,SG-B/M20取得最大吸附量0.58 g/g。复合吸附剂在110℃下脱附90 min水蒸气脱附率>98%。SG-B/M20、SG-C/M20具有良好的循环稳定性,经8次吸附-脱附循环后吸附量减小量<0.03 g/g。硅胶/MgCl_(2)复合吸附剂的水蒸气吸附性能探究,为硅胶基复合材料在空气取水领域的应用提供数据参考。A new type of silica/MgCl_(2)composites was synthesized by the impregnation method.The effects of the pore size and particle size of silica gel,the MgCl_(2)concentration,and the temperature and RH of the adsorption environment on the adsorption performance of silica gel/MgCl_(2)composite adsorbent were analyzed.Experiments show that the adsorption capacity of the composite adsorbents is proportional to the pore size of silica gel and inversely proportional to the particle size of silica gel.The equilibrium adsorption capacities of SG-A/M20,SG-B/M20,SG-C/M20 are 0.25,0.37 and 0.39 g/g at 25℃,50%RH,respectively;at 25℃,35%RH,the equilibrium adsorption capacities of SG-D/M20,SG-A/M20,and SG-E/M20 are 0.21,0.16,and 0.14 g/g,respectively.When the RH is 35%~80%,the adsorption amount of the composite adsorbent increases with the increase of RH,and the adsorption amount of the composite adsorbent increases with the temperature increase and then decreases.At 25℃and RH 80%,SG-B/M20 achieved maximum adsorption of 0.58 g/g.The desorption rate of the composite adsorbent is more than 98%when at 110℃for 90 min.SG-B/M20 and SG-C/M20 have good cycling stability,and the decrease in adsorption capacity is less than 0.03 g/g after 8 adsorption cycles.The water vapor adsorption performance of silica gel/MgCl_(2)composite adsorbent was explored to provide data reference for the application of silica-based composite materials in the field of air-water extraction.

关 键 词：复合吸附剂 平衡吸附量 硅胶孔径 硅胶粒径 空气取水 

分 类 号：TQ424[化学工程]