| 摘要: |
| 采用凹凸棒粘土和氯化钙为主要原料，用溶解-混合法制备了复合吸附剂；采用正压重量法测量了复合吸附剂对氨的吸附等温线；并测定了吸附剂-氨工质对的制冷特性。结果表明：吸附温度30℃下，复合吸附剂对氨的平衡吸附量为1.1kg/kg，与氯化钙对氨的平衡吸附量相当。在装填密度为600kg/m3，吸附温度为30℃、蒸发压力为0.25MPa、解吸温度为300℃条件下，对氨的吸附量达到0.89~0.92kg/kg，?环吸附量为0.55~0.58kg/kg，是纯氯化钙的1.7倍；复合吸附剂-氨工质对制冷量可达761.84kJ/kg，比氯化钙-氨工质对提高了70%。而且，复合吸附剂具有良好的吸附解吸稳定性能。 |
| 关键词: 工程热物理 复合吸附剂 吸附量 制冷量 凹土 |
| DOI： |
| 投稿时间：2011-09-28
|
| 基金项目:国家自然科学基金（20876074）资助项目。 |
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| Adsorption Refrigeration Characteristic of Attapulgite Based Calcium Chloride Composite Adsorbents |
|
Wan Yi, Li Quanguo, Rui Zhengqiu, Cui Qun, Chen Haijun, Wang Haiyan, Yao Huqing
|
| (College of Chemistry and Chemical Engineering, Nanjing University of Technology) |
| Abstract: |
| The composite absorbent is mainly consisted of attapulgite and CaCl2 as the resources, which were prepared by the dissolution-mixed method, and the content of attapulgite in composite absorbent is 10%. Adsorption isotherms of ammonia on absorbents were determined by positive gravimetric method. Adsorption-desorption cycle performance and cooling characteristics of composite absorbent -ammonia working pairs was evaluated by self-made adsorption-desorption measuring device. Experimental results show that the equilibrium capacity of ammonia on the composite absorbent is up to 1.1kg/kg at 30℃, which is equal to that of CaCl2. The conditions of loading density 600kg/m3, adsorption temperature 30℃, ammonia evaporation pressure 0.25 MPa, desorption temperature 300℃, adsorption capacity of ammonia in the composite absorbent and its cyclic adsorption capacity is 0.89~0.92 kg/kg and 0.55~0.58 kg/kg, respectively, which is 1.7 times than that of CaCl2-ammonia working pairs. The cooling capacity is up to 761.84kJ/kg, which is increased by 70% compared to CaCl2/ ammonia. What’s more, composite absorbent has excellent adsorption and desorption stability. |
| Key words: engineering thermophyics composite adsorbent adsorption capacity cooling capacity attapulgite |
