Investigation of Surface Absorption of Mercaptan from Gas by SBA-15 Supported ZnO Nano Particale
Nader Olad, Bijan Ghanavati
Sulfur in gases causes many problems associated with environmental pollution, and the loss of industrial equipment. Selective adsorption of sulfur compounds is one of the most widely used methods, the most important advantages of this method are the desulphurisation reaction at low temperature and pressure, which reduces the cost of refining operations. In this study, ZnO nanoparticles was made based on Silica mesoporous (SBA-15), different methods such as: ICP, BET, XRD were used to check the physical and chemical properties and the absorbent action to remove gas-Iso¬ propyl-mercaptan (IPM). Various experiments were carried out to remove the mercaptan gas by adsorbent discontinuously. Then, the effect of effective absorption parameters such as temperature, loading rate, contact time, and initial gas concentration were studied. The maximum absorption was achieved in condition, contact time is 50 minutes, and temperatyre is 298 k, With a loading rate of 5% nanoparticles, initial concentration of 500 ppm. For determining the most suitable absorption isotherm, Temkin, Langmuir, Freundlich adsorption isotherm have been studied. The relationships between Langmuir Temkin, Langmuir isotherms for adsorbents were investigated. The result of this study showed that isotherm temperature with Freundlich is more consistent with experimental data (R2 = 0.998). The results showed that the adsorbents have a good ability to remove Iso propyl mercaptan gas.