Preparation, characterization and performance evaluation of supported zeolite on porous glass hollow fiber for desalination application

A-type zeolite membranes were synthesized on porous glass hollow fibers that prepared using the in-situ hydrothermal process. The porous glass hollow fibers were prepared using the phase inversion and sintering technique with the addition of yttria stabilized zirconia (YSZ) to improve their porosity. The glass hollow fibers were characterized using the scanning electron microscope (SEM), Fourier transform infrared (FTIR), mechanical properties and water permeability. The porosities of pure glass hollow fiber were improved by the addition of YSZ particles, which lead to an increase in the pure water permeability. The water permeability shows that the glass hollow fiber prepared form spinning suspension E, which has 30 wt% zeolite particles and 20 wt% YSZ particles, has the highest permeability of 155.65 L m−2 hr−1 bar−1 compared to the previous work, which was only 4.0 L m−2 hr−1 bar−1. This glass hollow fiber was later used as the support for the incorporation of zeolite membrane for the desalination application. The performance of membranes is separating sodium chloride (NaCl) salt solution were tested using two different setups, namely pressure driven reverse osmosis (RO) and sweeping liquid assisted reverse osmosis (SLRO). The solute flux for 5,000 and 10,000 ppm NaCl salt solutions were 24.45 and 17.86 L m−2 hr−1, respectively. Both operations enabled the solute rejection up to 98%

Synthesis and characterizations of mil-140b-al2o3/ysz ceramic membrane using solvothermal method for seawater desalination

Membranes for desalination using forward osmosis (FO) should be stable and ordered, with high water flux and low reverse solute flux performances. In this study, metal-organic framework (MOF) was embedded on a ceramic membrane surface in order to make it feasible to be used in FO process. Two-stage preparation steps were taken involving sol-gel Pechini’s method for membrane surface modification, followed by solvothermal synthesis to finally deposit the MIL-140B (MOF) on the membrane’s surface. 1D structure of our MOF (MIL-140B) was observed using field-emission scanning electron microscopy (FE-SEM) and its unaffected crystallinity was proved using X-ray diffraction (XRD) regardless of changes in the study parameters (reactant concentration and time of synthesis). Brunauer-Emmett-Teller (BET) conducted in this study displayed type IV isotherm pattern with hysteresis loop which signify MIL-140B as a mesoporous particle. The final performance results concluded that 0.3 M reactant concentration under 16 h synthesis time was the best preparation condition since sample D gave excellent water flux (12.023 L/m2 h) and showed remarkable drop in the reverse solute flux (0.094 L/m2 h) performances. These results indicate a potential of high FO membrane efficiency as comparable to the best in the literature