Multicomponent (Binary and Ternary) Adsorption Equilibria of Volatile Organic Compounds (Acetone, Toluene, and n-Hexane) on Activated Carbon in Supercritical Carbon Dioxide
Multicomponent (Binary and Ternary) Adsorption Equilibria of Volatile Organic Compounds (Acetone, Toluene, and n-Hexane) on Activated Carbon in Supercritical Carbon Dioxide
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DOI：
10.1021/acs.iecr.5b04383
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发表时间：
2016-02
影响因子：
4.2
通讯作者：
Ikuo Ushiki;Yoshiyuki Sato;Masaki Ota;H. Inomata
中科院分区：
文献类型：
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作者：
Ikuo Ushiki;Yoshiyuki Sato;Masaki Ota;H. Inomata
在超临界CO2（scCO 2）条件下，研究了丙酮、甲苯和正己烷3种挥发性有机物（VOCs）在活性炭上的多元（二元和三元）吸附平衡。在313-353 K和4.2-10.0 MPa下测得了多组分吸附平衡数据，该数据取决于吸附剂与被吸附物的亲和力。由于CO2浓度的影响，吸附的VOCs量随压力的升高和温度的降低而降低。测得的吸附平衡相关的Dubininin-Astakhov方程使用两个参数的平均相对偏差的5.5%以内。这些参数，这是基于这些相关性确定的，提供了信息的多组分吸附平衡的挥发性有机化合物scCO 2条件下，同时考虑挥发性有机化合物和吸附剂之间的相互作用，体相CO2密度，和竞争吸附的挥发性有机化合物和CO2在吸附相。
The multicomponent (binary and ternary) adsorption equilibria of three volatile organic compounds (VOCs) (acetone, toluene, and n-hexane) on activated carbon were studied under supercritical carbon dioxide (scCO2) conditions. The multicomponent adsorption equilibrium data were obtained at 313–353 K and 4.2–10.0 MPa and depended on the affinities of the adsorbates for the adsorbent. The amounts of adsorbed VOCs decreased with increases in the pressure and decreases in the temperature, owing to the effects of the CO2 density. The measured adsorption equilibria were correlated within 5.5% of the average relative deviation to the Dubinin–Astakhov equation using two parameters. These parameters, which were determined based on these correlations, provided information on the multicomponent adsorption equilibria of the VOCs under scCO2 conditions while considering the interactions between the VOCs and the adsorbent, the bulk phase CO2 density, and the competitive adsorption of the VOCs and CO2 in the adsorbed phase.