Synthesis of Nano-zeolite and Its Adsorption Performance for Hydrogen Sulfide

Nanosized SOD type and X-type zeolites were synthesized by the free-template hydrothermal method, and the hydrogen sulfide removal performance was investigated. By comparing the hydrogen sulfide adsorption performance of the two kinds of zeolite, it was confirmed that the adsorption of hydrogen sulfide in zeolite was mainly concentrated in the pores and accessible active silos. The influences of volume space velocity and adsorption temperature as well as the size of zeolite on hydrogen sulfide adsorption were deduced. It is found that nano-sized X zeolite has larger sulfur capacity, and the zeolite is easy to remove hydrogen sulfide molecules at low temperature and low space velocity. Then, the metal supported molecular sieves were obtained by ion exchange. The sulfur capacity of Cu-NaX-N can reach 20.6 mg/g, better than that of other ion modified adsorbents. The sulfur capacity of regenerated NaX-N and Cu-NaX-N zeolites can reach 62.4% and 78.5% of that of fresh zeolite, respectively.