Adsorption Equilibria of cis-5,8,11,14,17-Eicosapentaenoic Acid Ethyl Ester and cis-4,7,10,13,16,19-Docosahexaenoic Acid Ethyl Ester on C18-Bonded Silica from Supercritical Carbon Dioxide
Adsorption Equilibria of cis-5,8,11,14,17-Eicosapentaenoic Acid Ethyl Ester and cis-4,7,10,13,16,19-Docosahexaenoic Acid Ethyl Ester on C18-Bonded Silica from Supercritical Carbon Dioxide
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超临界二氧化碳中 cis-5,8,11,14,17-二十碳五烯酸乙酯和 cis-4,7,10,13,16,19-二十二碳六烯酸乙酯在 C18 键合二氧化硅上的吸附平衡
DOI：
10.1021/je801003d
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发表时间：
2009-07
影响因子：
--
通讯作者：
Ren, Qilong
中科院分区：
文献类型：
--
作者：
Wu, Pingdong;Yang, Yiwen;Su, Baogen;Xing, Huabin;Han, Yisong;Ren, Qilong
研究了C18键合硅胶对超临界CO2中顺式-5，8，11，14，17-二十碳五烯酸乙酯（EPA-EE）和顺式-4，7，10，13，16，19-二十二碳六烯酸乙酯（DHA-EE）的吸附平衡。通过静态法测定了在（318.15）K、328.15和338.15）K下的吸附等温线，压力对应于二氧化碳密度（0.497、0.618和0.723）g·mL−1。等温线被认为是II型，可以很好地拟合的BET方程。EPA-EE的单分子层吸附量为（0.039 ~ 0.048）mmol·g−1，DHA-EE的单分子层吸附量为（0.040 ~ 0.063）mmol·g−1。在体相中EPA-EE或DHA-EE的平衡分子分数一定的情况下，吸附量随温度略有下降，但随二氧化碳密度的增加而显著下降。在相同条件下，DHA-EE的吸附量大于EPA-EE，EPA-EE和DHA-EE在不同温度和CO2浓度下的吸附等温线一致。
The adsorption equilibrium of cis-5,8,11,14,17-eicosapentaenoic acid ethyl ester (EPA-EE) and cis-4,7,10,13,16,19-docosahexaenoic acid ethyl ester (DHA-EE) on C18-bonded silica from supercritical carbon dioxide was studied. The adsorption isotherms at (318.15, 328.15, and 338.15) K under pressures corresponding to carbon dioxide densities of (0.497, 0.618, and 0.723) g·mL−1 were determined by a static method. The isotherms were found to be of type II and could be well fitted by the BET equation. The monolayer adsorption amount of EPA-EE was (0.039 to 0.048) mmol·g−1, and that of DHA-EE was (0.040 to 0.063) mmol·g−1. At a given equilibrium molecular fraction of EPA-EE or DHA-EE in the bulk phase, the adsorption amount decreases slightly with temperature but decreases significantly with carbon dioxide density. Under the same conditions, the adsorption amount of DHA-EE is greater than that of EPA-EE. The adsorption isotherms of both EPA-EE and DHA-EE at different temperatures and carbon dioxide densities coi...
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影响因子：
3.9
作者：
P. Subra;Arlette Vega-Bancel;E. Reverchon
通讯作者：
P. Subra;Arlette Vega-Bancel;E. Reverchon
影响因子：
4.7
作者：
E. Reverchon;G. Lamberti;P. Subra
通讯作者：
E. Reverchon;G. Lamberti;P. Subra
影响因子：
4.2
作者：
C. Tan;Din-Chung Liou
通讯作者：
C. Tan;Din-Chung Liou
影响因子：
2.6
作者：
H. Inomata;T. Kondo;S. Hirohama;K. Arai;Suzuki Yasuo;Masanori Konno
通讯作者：
H. Inomata;T. Kondo;S. Hirohama;K. Arai;Suzuki Yasuo;Masanori Konno
DOI：
10.5650/jos1996.48.1169
发表时间：
1999-10
期刊：
Journal of Japan Oil Chemists Society
影响因子：
--
作者：
M. Yamaguchi;Yasuhiko Kadota;Isao Tanaka;Y. Ohtsu
通讯作者：
M. Yamaguchi;Yasuhiko Kadota;Isao Tanaka;Y. Ohtsu