A Novel Chemical Surface Modification for the Fabrication of PEBA/SiO2 Nanocomposite Membranes To Separate CO2 from Syngas and Natural Gas Streams
A Novel Chemical Surface Modification for the Fabrication of PEBA/SiO2 Nanocomposite Membranes To Separate CO2 from Syngas and Natural Gas Streams
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DOI：
10.1021/ie503216p
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发表时间：
2014-11-05
影响因子：
4.2
通讯作者：
Kasiri, Norollah
中科院分区：
文献类型：
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作者：
Ghadimi, Ali;Mohammadi, Toraj;Kasiri, Norollah
在这项工作中，一种新的化学改性引入到制造聚（醚-嵌段-酰胺）/二氧化硅（PEBA/SiO2）纳米复合膜分离CO2的合成气和天然气流。顺式-9-十八碳烯酸（OA）用于纳米颗粒的表面改性以限制它们在聚合物基质内的团聚。据我们所知，没有证据表明这种改性剂用于制造纳米复合膜。通过纯气体和混合气体渗透实验考察了所制膜的分离性能。改性纳米粒子的掺入到聚合物基体中改善了所制造的纳米复合膜的分离性能。例如，通过将SiO2纳米颗粒的负载含量从0重量%（纯PEBA膜）增加到8重量%，在25 ℃和2巴下，CO2/H-2、CO2/CH 4和CO2/N-2的理想选择性值分别从9、18和61提高到17、45和137。
In this work, a novel chemical modification is introduced to fabricate poly(ether-block-amide)/silica (PEBA/SiO2) nanocomposite membranes for the separation of CO2 from syngas and natural gas streams. cis-9-Octadecenoic acid (OA) was utilized for surface modification of the nanoparticles to restrict their agglomeration within the polymeric matrix. To our best knowledge, there is no evidence about the application of this modifier agent for the fabrication of nanocomposite membranes. The separation performance of fabricated membranes was investigated by pure and mixed gas permeation experiments. The incorporation of modified nanoparticles into the polymeric matrix improved the separation performance of the fabricated nanocomposite membranes. For instance, by increasing the loading content of the SiO2 nanoparticles from 0 wt % (the neat PEBA membrane) to 8 wt %, at 25 degrees C and 2 bar, the ideal selectivity values of CO2/H-2, CO2/CH4, and CO2/N-2 were improved from 9, 18, and 61 to 17, 45, and 137, respectively.