Synthesis of nano-composite membranes using a phase inversion technique with polymer polyacrilonitrile-fe2o3 membrane for the separation of oil refinery effluent by coating using crosslinked PVA obtained results about the effect of the concentration of nano-composite polyacrilonitrile-Fe2O3 membrane on membrane performance can increase flux and rejection because Fe2O3 has properties that can increase hydrophilic properties. The effect of the duration of ultra violet irradiation on the performance of nano-composite polyacrilonitrile-Fe2O3 membrane for the separation of oil refinery wastewater, makes the membrane flux value increase but the rejection value decreases. The addition of PEG to increase the work and characterization of nano-composite membranes in the separation of oil refinery waste increases. Significant results can be seen from SEM, fourier transform electron microscopy (FTIR) and mechanical tests on membranes.
Titanium Silicate-1 (TS-1) has been successfully modified by combining Silver (Ag) metals. In this study, the preparation of Ag/TS-1 was carried out by impregnation method using a solution of silver nitrate (AgNO3) as a precursor to TS-1 with a loading variation of 0.5%, 1%, 2%, and 4%. Impregnation carried out on TS-1 aims to disperse Ag (1) only attached to the surface of TS-1 particles (before calcination/TK) and (2) on the entire surface of TS-1 particles (after calcination/K). The synthesized catalyst was then characterized by X-ray diffraction, infrared spectroscopy, and pyridine adsorption techniques. The XRD pattern shows that all the catalysts have high crystallinity with MFI structure, and there is no other crystalline phase. The infrared spectra showed that the titanium tetrahedral in TS-1 remained after Ag impregnation. The TS-1 and Ag/TS-1 catalysts were analyzed for their surface acidity using pyridine adsorption on the sample. The pyridine adsorption technique showed the presence of Lewis sites on Ag/TS-1. In this study, the presence of Ag loading on the Ag/TS-1 catalyst affected the TS-1 catalytic activity. The amount of cyclohexanone oxime product produced in XAg/TS-1 was more than in Ag/TS-1.
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