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[摘要]：The feasibility of Pd/Ti-SBA-15 catalysts in the elimination of benzene was explored comprehensively. The effects of the titanium incorporation on catalyst physicochemical property and activity were investigated by X-ray diffraction, N-2 adsorption/desorption, Fourier transform infrared spectroscopy, DRUV-vis, NH3-TPD, scanning electron microscope, and transmission electron microscope techniques. Only a certain quantity of titanium can be incorporated into the support, and titanium has a positive influence on active phase dispersion. Titanium-modified catalysts possess larger pore diameter than the pure Pd/SBA-15 and titanium can introduce the acid sites to the support. The evaluation result shows that the titanium incorporation can noticeably improve the catalytic activity, and all evaluated catalysts possess excellent stability, without obviously activity loss during 60 h test. (C) 2010 American Institute of Chemical Engineers Environ Prog, 29: 435-442, 2010 |
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