活性氧化铝/(LiCl+CaCl_(2))复合吸附剂水吸附性能研究  

Research on water adsorption performance of activated alumina/(LiCl+CaCl_(2)) composite adsorbent

作　　者：孙有改 赵惠忠[1] 张峰 高娅洁 张斌斌 SUN You-gai;ZHAO Hui-zhong;ZHANG Feng;GAO Ya-jie;ZHANG Bin-bin(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：《化学工程》2022年第5期6-11,共6页Chemical Engineering(China)

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：采用两步浸渍法将LiCl和CaCl_(2)复合到活性氧化铝多孔基质中,制备用于吸附式空气取水的性能良好的新型复合吸附剂。对复合吸附剂进行水蒸气吸附及解吸性能测试,并将单一吸附剂和复合吸附剂吸附能力作对比分析。实验结果表明:相同工况下,复合吸附剂AA-CXL25型相比AA-L25CX型吸附能力有很大提升,在25℃、50%RH(相对湿度)下,AA-C10L25的平衡吸附量为0.296 g/g,吸附能力比AA-L25C10提高了76.19%;随着CaCl_(2)溶液质量分数的增加,AA-L25CX型复合吸附剂的吸附能力依次增强,而AA-CXL25型复合吸附剂的吸附能力相差不大甚至是下降的;复合吸附剂对水蒸气的吸附能力随相对湿度的增加而增强;无论从吸附能力还是经济性来看,AA-C10L25相比AA-L25都有一定的优越性。活性氧化铝/(LiCl+CaCl_(2))复合吸附剂的制备与研究,为吸附式空气取水的研究提供了基础数据。The novel composite adsorbents with good performance for the adsorption water extraction from air were prepared by combining LiCl and CaCl_(2)into an activated alumina porous matrix with a two-step dipping method.The adsorption and desorption properties of the composite adsorbent on water vapor were tested,and the adsorption capacity of the single adsorbent and the composite adsorbent was compared and analyzed.The results of experiments demonstrate that the adsorption capacity of the composite adsorbent AA-CXL25 is significantly improved,compared with AA-L25CX under the same operating conditions,the equilibrium adsorption capacity of AA-C10L25 is 0.296 g/g,with 76.19%of adsorption capacity that is higher than that of AA-L25C10 at 25℃and 50%RH(relative humidity);the adsorption capacity of AA-L25CX composite adsorbent increases with the increase of CaCl_(2)solution mass fraction,but there is no significant difference in the adsorption capacity of AA-CXL25 composite adsorbent,which even decreases;the adsorption capacity of the composite adsorbent for water vapor increases with the increase of relative humidity;AA-C10L25 has certain advantages over AA-L25 in terms of adsorption capacity and economy.The preparation and study of activated alumina/(LiCl+CaCl_(2))composite adsorbent provide the basic data for the study of adsorption water extraction from air.

关 键 词：空气取水 复合吸附剂 二元盐 活性氧化铝 吸附 解吸 

分 类 号：TQ424[化学工程]