氧化铝基铜吸附剂的制备及其对柴油脱硫性能的研究  

Preparation and Performance of Alumina Supported Copper Adsorbent for Diesel Desulfurization

作　　者：陈素华[1] 陈晓晖[1] 魏可镁[1] 

机构地区：[1]福州大学化肥催化剂国家工程研究中心化学化工学院,福建福州350002

出　　处：《石油化工》2012年第7期789-795,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(20976030)

摘　　要：采用等体积浸渍法制备氧化铝基铜吸附剂,以柴油考察制备条件和吸附脱硫工艺条件对吸附剂脱硫性能的影响,并通过XRD和N2吸附-脱附等方法对其进行表征。表征结果显示,铜负载量4%(w)(按CuO计)己达到氧化铝负载硝酸铜单分子层最大分散量。实验结果表明,氧化铝基铜吸附剂的较佳制备条件为:载体采用乙酸溶液浸泡处理,氮气中于450℃下焙烧4h;吸附脱硫工艺条件为:吸附温度60℃,WHSV=1.0 h-1,铜负载量2%(w)。在此条件下,吸附剂总脱硫率为66.4%,其中各种硫化物的脱硫率分别为:噻吩类硫化物100.0%、甲基苯并噻吩85.1%、C2-苯并噻吩51.2%、多烷基苯并噻吩9.6%、二苯并噻吩81.0%、甲基二苯并噻吩77.9%、C2-二苯并噻吩74.8%、多烷基二苯并噻吩69.9%。Alumina supported copper adsorbents were prepared by isochoric impregnation and characterized by means of X-ray diffraction and N2-physisorption. The desulfurization of diesel on the adsorbents was studied in a fixed bed reactor. The XRD result showed that the copper loading（based on mass fraction of copper oxide） could reach 4%, the maximum monolayer copper nitrate loading on the alumina support. The experimental results indicate that the appropriate preparation conditions for the adsorbents are as follows： treating the support with acetic acid solution and calcination in nitrogen at 450℃ for 4 h; that the appropriate conditions for the desulfurization on the adsorbent are as follows： temperature 60℃, 2% copper loading and WHSV 1.0 h-1. The total desulfurization rate can reach 66.4% under the above conditions, thereinto, thiophene compounds 100.0%, methyl-benzothiophene 85.1%, C2-benzothiophene 51.2%, polyalkyl-benzothiophene 9.6%, dibenzothiophene 81.0%, methyl-dibenzothiophene 77.9%, C2-dibenzothiophene 74.8% and polyalkyl-dibenzothiophene 69.9%.

关 键 词：氧化铝铜基吸附剂 柴油 吸附脱硫 

分 类 号：TQ424.2[化学工程]