Dendrimer liquid membranes:: CO2 separation from gas mixtures
Dendrimer liquid membranes:: CO2 separation from gas mixtures
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DOI：
10.1021/ie0010520
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发表时间：
2001-05-30
影响因子：
4.2
通讯作者：
Sirkar, KK
中科院分区：
文献类型：
--
作者：
Kovvali, AS;Sirkar, KK
研究了第0代聚酰胺-胺（PAMAM）树状大分子在固定化液膜（ILM）中的应用，并将其用于CO2-N2的分离。该树枝状聚合物作为纯液体用作具有高度增湿的进料气体的CO（2）-选择性分子门（Kovvali等人，J，Aml Chem. Sec. 2000，122，7594）。本工作拓宽了：通过向纯树枝状聚合物液体中加入少量甘油，进料气流（RH（f））的相对湿度范围。发现75%树枝状聚合物-25%甘油ILM显著增加RH（f）的操作范围，同时保持CO（2）渗透性和选择性（α（CO2/N2））接近用纯树枝状聚合物ILM观察到的水平。发现纯的和75%的树枝状聚合物离子液体膜的性能是上级的或与报道的最高α（CO2/N2）相当。这种行为在三个方面得到了解释：在加湿进料条件下树枝状聚合物液膜中的带电环境和促进CO（2）的传输。
A generation 0 poly(amidoamine) (PAMAM), dendrimer in the immobilized liquid membrane (ILM) configuration was studied using flat films and hollow fibers for CO(2)-N(2) separation. This dendrimer as a pure liquid functions as a CO(2)-selective molecular gate with highly humidified feed gas (Kovvali et al. J, Aml Chem. Sec. 2000, 122, 7594). The present work broadens:the range of relative humidity of the feed gas stream (RH(f)) by adding a small amount of glycerol to the pure dendrimer liquid. A 75% dendrimer-25% glycerol ILM was found to increase-the operating range of RH(f) substantially while maintaining the CO(2) permeance and the selectivity (alpha (CO2/N2)) close to the levels observed with a pure dendrimer ILM. The performances of pure and 75% dendrimer ILMs were found to be superior or comparable to the highest reported alpha (CO2/N2); This behavior is explained in ter;lis of the charged environment in the dendrimer liquid membrane under humidified feed conditions and facilitated transport Of CO(2).