汽油活性炭基脱硫吸附剂的制备与评价  

Preparation and evaluation of gasoline activated carbon-based desulfurization adsorbent

作　　者：唐晓东[1,2] 李林[3] 曾雪玲[1] 赖先熔[1] 

机构地区：[1]西南石油大学油气藏地址及开发工程国家重点实验室,四川成都610500 [2]西南石油大学化学化工学院,四川成都610500 [3]中国石油兰州石化公司炼油厂,甘肃兰州730060

出　　处：《燃料化学学报》2009年第5期629-634,共6页Journal of Fuel Chemistry and Technology

摘　　要：以250℃温度下浓硫酸改性后的活性炭为载体,采用浸渍法制备了以MnO2为活性组分的活性炭基的汽油脱硫吸附剂MnO2/AC,考察了吸附剂的制备条件及脱硫条件对脱硫效果的影响。研究结果表明,适宜的吸附剂制备条件为,以Mn(NO3)2为活性组分前驱物,Mn(NO)2浸渍液浓度0.15 mol/L、常温下浸渍24 h、焙烧温度350℃、焙烧时间2 h。该吸附剂在静态吸附温度120℃、吸附时间2 h、剂油质量比0.10的条件下可使原料油硫的质量分数从628.6×10-6降至221.5×10-6,脱硫率达到64.8%;在动态吸附温度60℃、空速1.76 h-1的条件下,初始流出汽油硫的质量分数降至21.8×10-6,初始脱硫率达到96.5%。Taking the activated carbon that was modified under 250℃ by concentrated sulfuric acid as support, a gasoline activated carbon-based desulfurization adsorbent MnO2/AC with MnO2 as active component was firstly prepared by impregnation. The effect of preparation and desulfurization condition on the desulfurization efficiency was investigated. The research results show that Mn（NO3）2 as the precursor, Mn（NO3）2 impregnation concentration of 0.15 mol/L, the impregnation time of 24 h under room temperature, the roasting temperature of 350 ℃ and the toasting time of 2 h are the suitable adsorbent preparation conditions . The sulfur content of material gasoline can be reduced from 628.6×10^-6 to 221.5×10^-6 which has the desulfurization efficiency up to 64.8% at the static adsorption temperature of 120℃, the adsorption time of 2 h and the mass ratio of adsorbent to gasoline of 0.10 ; while the sulfur content in initial gasoline effluent after adsorption can be decreased from 628.6×10^-6 to 21.8×10^-6 and the initial desulfurization efficiency is 96.5% at the dynamic adsorption temperature of 60℃ and the LHSV of material gasoline of 1.76h^-1.

关 键 词：汽油 吸附脱硫 吸附剂 制备 评价 

分 类 号：TE624.54[石油与天然气工程—油气加工工程]