Steady-state equation of water vapor sorption for CaCl(2)-based chemical sorbents and its application.
Steady-state equation of water vapor sorption for CaCl(2)-based chemical sorbents and its application.
复制标题
CaCl2基化学吸附剂水蒸气吸附稳态方程及其应用
DOI：
10.1038/srep34115
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发表时间：
2016-09-29
影响因子：
4.6
通讯作者：
Sun L
中科院分区：
文献类型：
--
作者：
Zhang H;Yuan Y;Sun Q;Cao X;Sun L
绿色氯化钙基化学吸附剂在吸附制冷、空气净化和空气干燥等方面得到了广泛的应用。提高吸收率的方法已被广泛研究，但相应的理论公式尚未报道。本文在稳态吸附假设的基础上，建立了固液共存吸附体系。理论分析和实验结果表明，该体系可以用稳态吸附过程来描述。得到了考虑湿度、温度和比表面积的稳态吸附方程μ = (η−γT)。基于工程应用和该方程，提出了增大化学吸附剂比表面积和调节临界相对湿度（γ）两种提高吸附剂吸附速率的方法。结果表明，在碳纳米管（CNTs）表面涂覆CaCl2粉末可以获得具有较大比表面积的CaCl2/CNTs复合材料。复合材料在4 h内达到吸附平衡，吸附量比纯CaCl2粉末提高了75%。此外，在饱和CaCl2溶液中加入NaCl粉可以显著降低溶液的γ。在相同的环境下，吸附率提高了30%。
Green CaCl2-based chemical sorbent has been widely used in sorption refrigeration, air purification and air desiccation. Methods to improve the sorption rate have been extensively investigated, but the corresponding theoretical formulations have not been reported. In this paper, a sorption system of solid-liquid coexistence is established based on the hypothesis of steady-state sorption. The combination of theoretical analysis and experimental results indicates that the system can be described by steady-state sorption process. The steady-state sorption equation, μ = (η − γT) , was obtained in consideration of humidity, temperature and the surface area. Based on engineering applications and this equation, two methods including an increase of specific surface area and adjustment of the critical relative humidity (γ) for chemical sorbents, have been proposed to increase the sorption rate. The results indicate that the CaCl2/CNTs composite with a large specific surface area can be obtained by coating CaCl2 powder on the surface of carbon nanotubes (CNTs). The composite reached sorption equilibrium within only 4 h, and the sorption capacity was improved by 75% compared with pure CaCl2 powder. Furthermore, the addition of NaCl powder to saturated CaCl2 solution could significantly lower the solution’s γ. The sorption rate was improved by 30% under the same environment.
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影响因子：
15
作者：
Furukawa, Hiroyasu;Gandara, Felipe;Yaghi, Omar M.
通讯作者：
Yaghi, Omar M.
影响因子：
4.7
作者：
HOORY, SE;PRAUSNITZ, JM
通讯作者：
PRAUSNITZ, JM
影响因子：
9.9
作者：
KHALIL, A
通讯作者：
KHALIL, A
DOI：
10.1021/j150457a006
发表时间：
1948-01-01
期刊：
JOURNAL OF PHYSICAL AND COLLOID CHEMISTRY
影响因子：
--
作者：
WALKER, WC;ZETTLEMOYER, AC
通讯作者：
ZETTLEMOYER, AC
影响因子：
4.6
作者：
Benkoula S;Sublemontier O;Patanen M;Nicolas C;Sirotti F;Naitabdi A;Gaie-Levrel F;Antonsson E;Aureau D;Ouf FX;Wada S;Etcheberry A;Ueda K;Miron C
通讯作者：
Miron C