Abstract
High purity oxygen can be used for various things. Oxygen purification method to be applied on this research is the Pressure Swing Adsorption (PSA) technique. The adsorbent that would be used is a natural zeolite, namely ZAL (Zeolite Alam Lampung). Natural zeolite has non-polar properties, so it will adsorb gas with high quadruple moment, which is nitrogen. The varied variable is the size of adsorbent and the concentration of H2SO4. The sizes are 18-35 mesh, 35-60 mesh, and 60-100 mesh. While the H2SO4 concentration are 1M, 2M and 3M. Size of ZAL, and the concentration of sulfuric acid (H2SO4) were varied to get the optimum value. The adsorbent will be activated in aqua demine, H2SO4, NaOH, and through a calcination process. The purpose of this pre-treatment was to remove the impurities and to increase the specific surface area of zeolite. Moreover, ZAL will also be modified by wet impregnation technique using AgNO3 solution with 1%-wt loading nominal. The morphology, composition, and crystal phase were characterized by BET, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX). The result of the adsorption process was analyzed by using GC (Gas Chromatograph). ZAL 35-60 mesh 1M showed the best performance on adsorbing nitrogen, with its lowest peak at 60356 μV. The result of this research suggested that ZAL itself has the main role on adsorbing nitrogen, while AgxO did not give any significant effect
Highlights
Oxygen is a vital chemical element that has an important role, either for a human metabolic system as well as for other purposes
The adsorption process that applies on Pressure Swing Adsorption (PSA) technique is based on the pressure different, in which the gas molecules will be bound to the adsorbent
The process of separating oxygen from the air PSA techniques will rely on the use of mineral aluminosilicate, known as zeolite to be a selective adsorbent of nitrogen [6]
Summary
Oxygen is a vital chemical element that has an important role, either for a human metabolic system as well as for other purposes. The process of separating oxygen from the air PSA techniques will rely on the use of mineral aluminosilicate, known as zeolite to be a selective adsorbent of nitrogen [6].
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