【摘要】 以介孔纳米硅球(MSN)为载体,采用溶胶-凝胶法制备出一系列不同La/Ni摩尔比的LaxNiyOz/MSN吸附剂(Ni0与La0的总质量分数固定为20%),利用氮气吸附(BET)、X射线衍射(XRD)、氢气程序升温还原(H2-TPR)、高分辨透射电子显微镜(HRTEM)、扫描电子显微镜(SEM)等分析手段对吸附剂进行了表征,并用含硫量为150 mg/L的商业柴油对其吸附脱硫性能进行了活性测试。结果表明,随着La含量的增加,LaxNiyOz/MSN系列吸附剂的比表面积、介孔孔容及突破硫容量均呈现先增大后减小的趋势,吸附剂La2Ni8Oz/MSN具有最高的比表面积和介孔体积,且在室温(25℃)下达到最大突破硫容量(0.598 mg/g)。更多还原

【Abstract】 Using the support of MSN( mesoporous silica- nano- particles),a series of sorbents LaxNiyOz/ MSN with different La / Ni molar ratios( the total mass fraction of Ni0 and La0was fixed at20%) were prepared by a sol- gel method. The sorbents were characterized by nitrogen adsorption isotherms( BET),X- ray diffraction( XRD),temperature- programmed reduction of hydrogen( H2-TPR),high- resolution transmission electron microscopy( HRTEM) and scanning electron microscopy( SEM),and the adsorption desulfurization performance of the synthesized sorbents was evaluated by using commercial diesel with sulfur content of 150 mg /L. The results showed that the BET surface area,the mesoporous volume and the breakthrough sulfur capacity first increased and then decreased with the increase of the content of La. The La2Ni8Oz/ MSN had the highest BET surface area and the mesoporous volume,and exhibited the maximum breakthrough sulfur capacity of 0. 598 mg / g at 25 ℃.更多还原