Add time:07/27/2019         Source:sciencedirect.com

Silicotungstic acid (STA) was modified with melamine and mixed matrix membranes containing melamine-modified STA (M-STA) particles were prepared for the pervaporation dehydration of a water–isopropanol (IPA) mixture. The characterization of the membranes was conducted by FT-IR, SEM, EDS, AFM, XRD and contact angle measurements. The M-STA loaded mixed matrix membranes showed improved pervaporation performance compared to the original membrane. Amidst all the M-STA composite membrane, 8 wt % M-STA loaded (M8-MSTA) membrane gave an optimum pervaporation performance having flux = 0.36 kg/m2h, separation factor 485.6 for 20 wt % water –isopropanol feed composition at 60 °C was observed. The pervaporation performance for M8-STA was further evaluated for various feed composition, from water/IPA 10/90 to 20/80 w/w at 60 °C the flux (increased from 0.033 to 0.36 kg/m2h) and separation factor (decreased from 6425 to 485.6) were strongly influenced by the feed composition. With M8-MSTA membrane, at 80 wt % IPA feed solution, when the temperature increased from 40 to 70 °C, flux increased significantly from 0.29 kg/m2h to 0.47 kg/m2h while separation factor declined from 2171 to 443.0 was observed. In the membrane durability study, the M-STA composite membrane (M8-MSTA) displayed the good stability and constant pervaporation results for long time pervaporation operation which confirmed that melamine modification prevent the leaching of STA from the membrane.

We also recommend Trading Suppliers and Manufacturers of SILICOTUNGSTIC ACID HYDRATE (cas 12027-38-2). Pls Click Website Link as below: cas 12027-38-2 suppliers