| Summary: | 碩士 === 國立中正大學 === 化學工程研究所 === 92 === The goals of this study are: (1) development of adsorbent regeneration technique for the removal of volatile organic compounds. To implement the research goal, metal salt are impregnated in Zeolite, mixed with silica binder, and followed with extrusion and calcinations. By these hydrophobic catalysts with ring in shape were thus prepared. In this study, the most appropriate metal catalyst is Pt. The principal function of platinum is to decrease incineration temperature. Thereby, reducing the auxiliary energy required during the regeneration process. By using the Pt catalysts, VOCs within adsorbent have been burned completely, and thus to lengthen catalyst life.(2)To prepare catalysts for the catalytic incineration of sulfur compounds containing waste gas and thus to solve of odors problem. The catalytic incineration catalysts are prepared by same procedures those for VOC incineration catalyst, whereas most appropriate metal is Au.
In order to investigate the optimal regeneration conditions and to understand the characteristics of catalyst deactivation, several characterization techniques have been used:
1.We put catalysts in fixed-bed reactor and estimate its adsorption capacity by breakthrough cure. The curve was obtained by examine concentration variation at inlet and outlet of reactor with GC.
2.EXAFS provides quantitative structure information of supported metal catalysts. These techniques are used to characterize fresh and H2S adsorbed Au/SiO2and Pt/SiO2 catalysts.
3.TPD provides regeneration kinetics of adsorbent, and the DMS conc. in tail gas was also analyzed.
4.FT-IR was used to characterize the surface species on the catalysts.
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