Mixed Matrix Carbon Molecular Sieve and Alumina (CMS-Al2O3) Membranes.

ABSTRACT: This work shows mixed matrix inorganic membranes prepared by the vacuum-assisted impregnation method, where phenolic resin precursors filled the pore of ?-alumina substrates. Upon carbonisation, the phenolic resin decomposed into several fragments derived from the backbone of the resin matrix. The final stages of decomposition (>650?°C) led to a formation of carbon molecular sieve (CMS) structures, reaching the lowest average pore sizes of ~5?Å at carbonisation temperatures of 700?°C. The combination of vacuum-assisted impregnation and carbonisation led to the formation of mixed matrix of CMS and ?-alumina particles (CMS-Al2O3) in a single membrane. These membranes were tested for pervaporative desalination and gave very high water fluxes of up to 25?kg m(-2) h(-1) for seawater (NaCl 3.5 wt%) at 75?°C. Salt rejection was also very high varying between 93-99% depending on temperature and feed salt concentration. Interestingly, the water fluxes remained almost constant and were not affected as feed salt concentration increased from 0.3, 1 and 3.5?wt%.

SUBMITTER: Song Y 

PROVIDER: S-EPMC4965814 | biostudies-other | 2016

REPOSITORIES: biostudies-other