摘要
分别采用超声浸渍法和普通浸渍法制备了Cu(Ⅰ)/SBA-15吸附剂,利用静态吸附实验比较了这两种方法制备的吸附剂在模型汽油中的噻吩吸附脱硫性能,并利用BET,TEM,XPS等手段对所制备的吸附剂进行了表征。结果表明,超声浸渍法制备的Cu(Ⅰ)/SBA-15吸附剂的脱硫性能明显优于普通浸渍法制备的吸附剂。BET结果显示,超声促进了活性组分铜在吸附剂表面的分散。TEM分析表明,在超声场下制备的Cu(I)/SBA-15吸附剂表面的铜粒子颗粒较小,且分布均匀。XPS分析显示,超声有效地提高了铜离子在吸附剂表面的负载量,并且促进Cu(I)在其表面含量的增加,从而有利于吸附脱硫性能的提高。
A series of Cu（I）/SBA-15 adsorbents were prepared by the methods of ultrasound-assisted impregnation and conventional impregnation, respectively. The thiophene adsorption desulfurization performance of the prepared adsorbents was compared by the static adsorption experiments with the model gasoline. The properties of these adsorbents were characterized by means of BET, TEM and XPS. The experimental results show that the adsorption desulfurization performance of Cu（I）/SBA-15 adsorbents prepared by ultrasound-assisted impregnation is much better than that of the adsorbent prepared by conventional impregnation method. BET results show that ultrasound treatment can promote the active Cu species to disperse on the adsorbents surface. In addition, TEM results show that the Cu particles on the surface of the adsorbents prepared by ultrasound treatment are finer and well-distributed. According to XPS analysis results, it was also found that the application of ultrasound promotes the distribution of Cu ions on the surface of the adsorbents, and increases the Cu（I） loading over the adsorbents obviously, therefore, adsorption desulfurzation performance of the adsorbents prepared with ultrasound treatment can be enhanced.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2008年第5期839-843,共5页
Journal of Chemical Engineering of Chinese Universities
基金
高等学校博士学科点专项科研基金项目(2004-02910050)
关键词
超声
铜
SBA-15
噻吩
吸附
脱硫
ultrasound
copper
SBA-15
thiophene
adsorption
desulfurization
