金属掺杂炭气凝胶的制备及其在燃油脱硫中的应用  

Preparation of mental-doped carbon aerogels and application in fuel desulphurization

作　　者：李华静[1] 李远刚[1] 惠晓刚[1] 

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054

出　　处：《西安科技大学学报》2013年第5期594-598,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金青年基金(201103134);陕西省科技厅工业攻关(2011K08-21)

摘　　要：随着"低碳环保"观念的日益深入人心,各国政府不断出台日益严格的燃油含硫标准来有效控制燃油中的含硫化合物所带来的环境污染。传统的加氢脱硫可有效脱除燃油中的非噻吩类硫化物,但却很难脱除噻吩(thiophene)、苯并噻吩(benzothiophene,BT)、二苯并噻吩(dibenzothiophene,DBT)及其衍生物等。为此,开发了一种吸附脱硫的新方法。制备了3种金属掺杂的炭气凝胶,并考察了该产物对含硫模拟油的吸附脱硫性能。间苯二酚与甲醛在含有金属离子的水溶液中缩聚,经过常压干燥以及N2氛下的高温炭化制备了铜,银,镍3种金属掺杂的炭气凝胶。采用物理吸附仪对典型样品的比表面积、孔径和孔容进行了表征。结果表明,所得样品均具有较大的比表面积,最大的达到了574.1 m2/g,最小的也有460.6 m2/g;而所有样品的孔径都在1.900nm左右。将所制备的炭气凝胶应用于模拟汽油脱硫,采用高效液相色谱法分析脱硫效果,发现不同金属含量、不同制备条件所得样品的脱硫效果差别很大,最大的脱硫效率高达85.64%.With the ＂low carbon＂ concept is growing in popularity,more stringent environmental regula- tions to lower the S-content in fuel oils are continuously introduced by governments for effectively con- trolling the environmental pollution caused by the S-content in fuel oils. The traditional industrial process is the hydrodesulfurization（HDS） , which is effective for non-thiophenic S-compounds, but less effective for the desulfurization of thiophene （ Th）, benzothiophene （ BT）, dibenzothiophene （DBT） and their de- rivatives. Therefore, we proposed a novel adsorption desulfurization method. In this paper, three mental- doped carbon aerogels have been prepared and the adsorption behaviors of three mental-doped carbon aerogels in model oil have been investigated. Copper, silver and nickel doped carbon aerogels were fabri- cated through polyeondensation of resorcinol and formaldehyde in aqueous solution containing mental i- ons followed by ambient pressure drying and then pyrolysis under N2 atmosphere. N2 adsorption-desorp- tion was employed to characterize the obtained samples and the results show that all carbon aerogels have high BET surface area. The maximum aspect surface area reaches 574. lm2/g and the minimum is 460. 6 ma/g. And the average pore size of all samples is about 1. 900 nm. Then we observe the desulphuriza- tion efficiency of different samples on simulated gasoline. High performance liquid chromatography （HPLC） analysis suggests the desulphurization ratio of these samples very different and the maximmn ratio reach 85.64%.

关 键 词：常压干燥 金属掺杂炭气凝胶 燃油脱硫 

分 类 号：TQ131[化学工程—无机化工]