Abstract
Hydrogen sulfide (H2S) gas has long been challenging for the gas industry due to its toxicity, corrosiveness, and high concentration. Various physical and chemical methods have been studied to remove sulfur contamination. Among these various methods, the selective adsorption process has been considered a suitable desulfurization process mainly due to its energy consumption, low cost, and high efficiency. Therefore, with high adsorption capacity, fast mass transfer, and easy regeneration, surface imprinting polymerizations (SIPs) is a very efficient method for producing molecularly imprinted polymers (MIPs). Based on the Taguchi design method, the optimum polymerization conditions with signal-to-noise ratio, template molecule (H2O), cross-linking agent (EGDMA), and molar ratio of functional monomer (MAA) 2:15:2.5, volume ratio of acetonitrile/ethyl acetate 1:9, primer was 75 and polymerization time was 24 hours. The volumetric method equation was used to determine the total amount of gas adsorbed. A better fit of the kinetic curve for the molecularly imprinted polymers (MIPs)/ Non-imprinted polymers (NIPs) adsorbent was obtained using the Langmuir equation and the pseudo-second-order kinetic model. The selectivity test results demonstrated the efficient adsorption and desorption capacity of MIPs@H2S. FE-SEM and BET showed that MIPs have a more specific surface area and a more multiporous structure than NIPs, which facilitates the adsorption of H2S.