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| TS-1 zeolite with a Si/Ti ratio of 50 was synthesized by hydrothermal method, which was characterized by XRD, FTIR and SEM techniques. The synthesized TS-1 showed low catalytic activity for the decomposition of nitric oxide and soon completely deactivate by oxygen inhibition. While TS-1 was pretreated in hydrogen at 723K for 10h, 100% NO conversion to N2 could be obtained for almost 125 minutes, which was attributed to the superior capability to adsorb hydrogen of TS-1 zeolite. As expected, TS-1 exhibited high catalytic activity as well as perfect selectivity in the reduction of nitric oxide by excess hydrogen. At the temperature above 723K, all the 2000 ppm nitric oxide could be converted to nitrogen entirely. TS-1 was thought as a promising catalyst for nitric oxide reduction in excess hydrogen and a supposed mechanism was given for better understanding of the reaction process. |
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| Keywords:TS-1, hydrogen, adsorption, nitric oxide, catalytic reduction |
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