CAJ | 학술논문

为开发出用于吸附式制冷的高性能吸附剂,基于炭化造孔原理制备了木屑氯化钙复合吸附剂,测试了氨气作为制冷剂的吸附性能,考察了原料配比、炭化温度对复合吸附剂性能的影响,并利用扫描电镜和能谱分析仪观察了复合吸附剂的微观形貌和元素分布.结果表明:炭化法制备的复合吸附剂具有丰富的微孔结构,氯化钙的含量高,达到70%以上,而且氯化钙在样本吸附剂中分布均匀;样本吸附剂的烧失率随炭化温度的升高而增加,而样本的吸附量随着炭化温度的升高先增大后减小;样本中氯化钙的含量对吸附量具有重要的影响.样本SB4的最大单位质量吸附剂制冷功率(SCP)达到1418.16 W/kg,前10 min的平均SCP达到876.1 W/kg.实验结果表明,炭化法制备的复合吸附剂不仅解决了氯化钙吸氨过程中的膨胀结块现象,而且增加了传质速率.
위개발출용우흡부식제랭적고성능흡부제,기우탄화조공원리제비료목설록화개복합흡부제,측시료안기작위제랭제적흡부성능,고찰료원료배비、탄화온도대복합흡부제성능적영향,병이용소묘전경화능보분석의관찰료복합흡부제적미관형모화원소분포.결과표명:탄화법제비적복합흡부제구유봉부적미공결구,록화개적함량고,체도70%이상,이차록화개재양본흡부제중분포균균;양본흡부제적소실솔수탄화온도적승고이증가,이양본적흡부량수착탄화온도적승고선증대후감소;양본중록화개적함량대흡부량구유중요적영향.양본SB4적최대단위질량흡부제제랭공솔(SCP)체도1418.16 W/kg,전10 min적평균SCP체도876.1 W/kg.실험결과표명,탄화법제비적복합흡부제불부해결료록화개흡안과정중적팽창결괴현상,이차증가료전질속솔.
To develop a high performance adsorbent,sawdust-CaCl2 composite adsorbents were prepared by carbonization,and their adsorption performance were assessed by measuring the variation of pressure in a vessel with a known volume,with NH3 as the refrigerant. The effects of raw material ratio,carbonization temperature on the adsorption performance of the prepared sawdust-CaCl2 composite adsorbents were investigated. The composite adsorbents were characterized by scanning electron microscope (SEM) and X-ray energy dispersive spectroscopy. The results show that,the prepared composite adsorbents have rich microporous structure,with CaCl2 content as high as 70%. Besides,CaCl2 and the sawdust mixed uniformly. The burn-off of the sample augments with the increase of carbonization temperature,and the NH3 adsorption quantity increases first and then decreases with the increase of carbonization temperature. Compared with the carbonization temperature,the raw material ratio plays the dominant influence on the adsorption properties of the samples. The maximum specific cooling power reaches 1418.16 W/kg,and average specific cooling power reaches 876.1 W/kg with the cycle duration of 10 minutes. The present study demonstrates that the sawdust-CaCl2 composite adsorbents prepared by carbonization are free of salt swelling and agglomeration,and provide a better mass transfer performance.