Abstract
The catalytic reduction of CO 2 by C 3 H 8 on Zn-loaded HZSM-5, concurrently converting C 3 H 8 into aromatics, was investigate through the catalytic test, the characterization of catalysts by XRD, XPS, SEM, TEM, and N 2 -adsorption, and some test reactions. The catalytic test revealed that HZSM-5 containing excess amount of Zn is effective for the reduction of CO 2 concurrently aromatizing C 2 H 8 as a reducing agent, and that CO 2 suppresses the by-production of C 2 H 6 and the deposition of coke in the aromatization of C 3 H 8 . The characterization study indicated that ZnO particles with a diameter of several nm are deposited in the mesopore of polycrystalline-type HZSM-5 and forms active sites not only for the activation of C 3 H 8 and the reduction of CO 2 but also for some side reactions of olefinic species. Test reactions revealed that CO 2 suppresses the side reactions of olefinic species through the preferential adsorption on ZnO surface.
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