摘要
通过搭建小质量的化学吸附试验台，采用容积法，研究了在约束体积为7．4L条件下复合吸附剂的吸附性能．结果表明，解吸过程中，当吸附床温度为70℃时，CaCl2·8NH3完全转化为CaCl2·4NH3，吸附床温度为80℃时，CaCl2·4NH。开始向CaCl2·2NH3转化，并在90℃转化完全；同时，通过对CaCl2·8NH3和CaCl2·4NH3，以及两者同时解吸时解吸速度的试验和数值预测发现：相同解吸温度下，CaCl2·8NH3的平均解吸速度是CaCl2·4NH3的2．0～3．7倍，两者同时解吸时的解吸速度小于两者单独解吸时的解吸速度之和；约束压力每提高0．05MPa，吸附剂在吸附过程中的平均吸附速度和总吸附量提高不大，约1．1倍．但是，氨的循环量相等为0．35g／g，约束压力为0．7、0．5MPa时，所需时间分别为2．5、10．1min．因此，约束压力的提高可以有效地缩短循环时间，从而达到提高系统性能的目的．
Using small mass system and by volumetric method, the adsorption performance of the composite adsorbent of calcium chloride and expanded graphite with mass ratio 4： 1 was studied. The constraint volume is 7.4 L. The testing results show that, during the heating process, CaC12 · 8NH3 completely transforms into CaCl2 - 4NH3 at 70 ℃; at 80 ℃, CaC12 · 4NH3 converses to CaCl2 · 2NH3, and at 90℃, the transformation completes. The experimental results also present that the desorption speed of CaCl2 · 8NH3 is 2.0--3.7 times of that of CaCl2 · 4NH3 and the desorption speed when CaCl2 · 8NH3 and CaCl2 · 4NHa desorption at the same time is lower than that of the sum of CaCl2 · 8NHa and CaCl2 · 4NHa respectively. The enlargement of the constraint pressure has a small influence on the total adsorption quantity and the average adsorption speed only enhances 1.1 times, but the enhancement of the constraint pressure can effectively shorten the cycle time and improve the adsorption performance of adsorption system when the cycle adsorption quantity is 0.35 g/g.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2008年第8期1381-1386,共6页
Journal of Shanghai Jiaotong University
基金
"十五"武器装备预研项目(41309020202)
关键词
复合吸附剂
容积法
约束压力
氯化钙
氨
composite adsorbent
volumetric method
constraint pressure
calcium chloride
ammonia
