采用微波技术制备了NiW /TiO2 Al2 O3 加氢脱硫催化剂,并用NH3 TPD ,Py FT IR ,TPR和TPS(程序升温硫化)对催化剂进行了表征;以噻吩为模型化合物,在中压固定床微反装置上考察了催化剂的加氢脱硫性能.结果表明,在w(TiO2 ) =15 %的催化剂样品中,微波处理的催化剂的活性比常规催化剂高.微波处理改变了载体和催化剂表面的酸性质,催化剂样品表面的强酸酸量减少,弱酸和中强酸酸量增加.微波处理的催化剂的还原性能和硫化性能均好于常规法制备的催化剂.这可能是微波技术制备的催化剂具有较高加氢脱硫活性的原因.
【英文摘要】
The NiW/TiO_2-Al_2O_3 catalyst samples were prepared by conventional drying method (CON-Cat) and by microwave irradiation method (MW-Cat and MW-Cat1). The catalyst samples were characterized with NH_3-temperature-programmed desorption, Py-FT-IR, temperature-programmed reduction, and temperature-programmed sulfurization techniques. The hydrodesulfurization (HDS) reactivity of thiophene over them was studied in a fixed-bed microreactor. The thiophene conversion over MW-Cat increased from 70.9% at 16 h to 71.8...
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