Frontiers of Chemical Science and Engineering
>> 2020,
Volume 14,
Issue 4
doi:
10.1007/s11705-019-1830-3
RESEARCH ARTICLE
Enhanced desulfurization performance of hybrid membranes using embedded hierarchical porous SBA-15
. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.. Multi-discipline Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Accepted: 2019-10-09
Available online: 2019-10-09
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Abstract
The utilization of materials with a hierarchical porous structure as multi-functional additives is highly attractive in the preparation of hybrid membranes. In this study, novel hybrid membranes are designed by embedding hierarchical porous Santa Barbara Amorphous 15 (SBA-15) with a dual-pore architecture (micropores and mesopores) for pervaporation desulfurization. The SBA-15 with cylindrical mesopores provides molecular transport expressways to ensure improved permeability, while micropores on the wall have molecular sieving effects that are essential for the enhancement of permselectivity of thiophene molecules. Considering thiophene/ -octane mixture as a model system, the hybrid membrane with embedded 6 wt-% SBA-15 exhibits optimal pervaporation desulfurization performance with a permeation flux of 22.07 kg·m ·h and an enrichment factor of 6.76. Moreover, the detailed structure and properties of hybrid membranes are systematically characterized. This study demonstrates the immense potential of hierarchical porous materials as additives in membranes to simultaneously increase permeability and permselectivity.
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