Abstract As a newkind of 2D nanomaterials, graphene oxide (GO)with 2-4 layerswas fabricated viaamodified Hummers method and used for the preparation of pervaporation (PV) membranes. Such GO membranes were prepared via a facile vacuum-assisted method on anodic aluminiumoxide disks and applied for the dehydration of butanol. To obtain GO membranes with high performance, effects of pre-treatments, including high-speed centrifugal treatment of GO dispersion and thermal treatment of GO membranes, were investigated. In addition, effects of operation conditions on the performance of GO membranes in the PV process and the stability of GO membranes were also studied. It is of benefit to improve the selectivity of GO membrane by pre-treatment that centrifuges the GO dispersion with 10000 r·min-1 for 40 min, which could purify the GO dispersion by removing the large size GO sheets. As prepared GO membrane showed high separation performance for the butanol/water system. The separation factor was 230, and the permeability was as high as 3.1 kg·m-2·h-1 when the PV temperature was 50 ℃ and the water content in feed was 10% (by mass). Meanwhile, the membrane still showed good stability for the dehydration of butanol after running for 1800 min in the PV process. GO membranes are suitable candidates for butanol dehydration via PV process.
Supported by the National High Technical Research Program of China (2012AA03A606), the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (12KJA530001) and the Innovative Research Team Program by the Ministry of Education of China (IRT13070).
Corresponding Authors: Yiqun Fan
Cite this article:
Xianfu Chen,Gongping Liu,Hanyu Zhang et al. Fabrication of graphene oxide composite membranes and their application for pervaporation dehydration of butanol[J]. Chin.J.Chem.Eng., 2015, 23(7): 1102-1109.
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