Study on consolidated activated carbon: Choice of optimal adsorbent for refrigeration application
Study on consolidated activated carbon: Choice of optimal adsorbent for refrigeration application
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DOI：
10.1016/j.ijheatmasstransfer.2013.08.052
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发表时间：
2013-12
影响因子：
5.2
通讯作者：
Yong Zhao;L. W. Wang;Ruzhu Wang;Kelong Ma;Long Jiang
中科院分区：
文献类型：
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作者：
Yong Zhao;L. W. Wang;Ruzhu Wang;Kelong Ma;Long Jiang
针对制冷工况，研究了复合活性炭的导热系数、渗透率、平衡吸附性能和非平衡吸附性能，以选择最佳的固结复合活性炭。制备了3种不同密度、不同粒度的吸附剂（硫酸处理膨胀天然石墨固结活性炭（ENG-TSA）、膨胀天然石墨固结活性炭（ENG）和颗粒活性炭（粒状活性炭）），并对3种吸附剂的性能进行了比较。实验表明，当密度为350 kg/m3 ~ 450 kg/m3时，ENG-TSA加固AC的导热系数和渗透率分别为6.75 ~ 7.45 W/m K和2.00 × 10− 12 ~ 1.00 × 10− 11 m2。平衡和非平衡吸附性能的研究表明，ENG-TSA的加入有助于改善浓度摆动。与ENG和粒状AC相比，ENG-TSA的固结AC的循环时间显著降低。对于从矩阵的ENG-TSA的最佳结果，虽然AC的体积密度降低，体积冷却功率是30%的颗粒状AC的结果相比，提高，因为循环时间显着减少。
For refrigeration condition in order to choose an optimal consolidated composite activated carbon (AC), the thermal conductivity, permeability, equilibrium adsorption performance, and non-equilibrium adsorption performance were studied. Six samples of three types of adsorbents (consolidated AC with expanded natural graphite treated with sulfuric acid (ENG-TSA), consolidated AC with expanded natural graphite (ENG) and granular AC) with different density and different grain size were produced and compared. Experiments showed that the thermal conductivity and permeability of consolidated AC with ENG-TSA are between 6.75 to 7.45 W/m K and 2.00 × 10−12to 1.00 × 10−11m2, respectively, when the density is ranged between 350 kg/m3and 450 kg/m3. The study on the equilibrium and non-equilibrium adsorption performance indicated that the addition of ENG-TSA helps to improve the concentration swing. The cycle time of consolidated AC with ENG-TSA decreases significantly compared with that of consolidated AC with ENG and granular AC. For the optimal results from the matrix of ENG-TSA although the bulk density of AC decreases, the volume cooling power is 30% improved in comparison with the results of granular AC because the cycle time decreases significantly.