氧化吸附法深度脱除MTBE产品中硫化物研究
发布时间：2018-07-23 12:18
【摘要】：甲基叔丁基醚(MTBE)是我国汽油中一种重要的调和组分。降低MTBE产品中硫化物含量,可促进汽油的清洁燃烧和环境保护。采用MTBE为溶剂分别配制了以二甲基二硫醚(DMDS)、甲基叔丁基硫醚(TBMS)为模型硫化物的含硫MTBE产品样品。脱硫剂由Pd/C、异丙醇、氢氧化钠和去离子水组成。首先,采用N2吸附等温线、TEM、XRD对Pd/C结构特征进行了表征。结果显示,Pd/C的比表面积为1 836m~2/g,孔容为0.98cm~3/g,根据其I型吸附等温线可知,其绝大部分孔为微孔。由Pd/C的TEM图可以看出,Pd的纳米颗粒比较均匀地分布于活性炭材料上,Pd金属纳米粒子直径约3~5nm。XRD图显示Pd纳米晶体颗粒的(111)、(200)、(220)和(311)典型晶面存在。脱硫实验结果显示,采用间歇反应器在50℃下,脱硫剂可在1h内将MTBE产品中的硫质量分数从150μg/g降至10μg/g以下,从而得到低含硫MTBE产品,脱硫剂的脱硫效果得到较好的验证。Pd/C既作为原位产生过氧化氢的催化剂,又是吸附砜类硫化物的吸附剂,洗脱再生后仍具有较好的催化和脱硫性能。
[Abstract]:Methyl tert Ding Ji ether (MTBE) is an important blending component in gasoline in China. Reducing sulfide content in MTBE products can promote clean combustion and environmental protection of gasoline. Using MTBE as solvent, the samples of sulfide-containing MTBE with dimethyl disulfide (DMDS),) methyl tert-Ding Ji sulfide (TBMS) as model sulfides were prepared. The desulfurizer consists of PD / C, isopropanol, sodium hydroxide and deionized water. Firstly, the structure of Pd/C was characterized by N 2 adsorption isotherm. The results show that the specific surface area of PD / C is 1 836 mg / g, and the pore volume is 0. 98 cm / g. According to the isotherm of type I adsorption, most of the pores are micropores. From the TEM diagram of Pd/C, it can be seen that the nanoparticles of Pd are uniformly distributed on the activated carbon material. The diameter of PD metal nanoparticles is about 3~5nm.XRD diagram. The typical crystal planes of (111), (200), (220) and (311) of PD nanocrystalline particles are found in 3~5nm.XRD diagram. The results of desulphurization experiment showed that the mass fraction of sulfur in MTBE product could be reduced from 150 渭 g / g to less than 10 渭 g / g in 1 h by using batch reactor at 50 鈩，
本文编号：2139395
[Abstract]:Methyl tert Ding Ji ether (MTBE) is an important blending component in gasoline in China. Reducing sulfide content in MTBE products can promote clean combustion and environmental protection of gasoline. Using MTBE as solvent, the samples of sulfide-containing MTBE with dimethyl disulfide (DMDS),) methyl tert-Ding Ji sulfide (TBMS) as model sulfides were prepared. The desulfurizer consists of PD / C, isopropanol, sodium hydroxide and deionized water. Firstly, the structure of Pd/C was characterized by N 2 adsorption isotherm. The results show that the specific surface area of PD / C is 1 836 mg / g, and the pore volume is 0. 98 cm / g. According to the isotherm of type I adsorption, most of the pores are micropores. From the TEM diagram of Pd/C, it can be seen that the nanoparticles of Pd are uniformly distributed on the activated carbon material. The diameter of PD metal nanoparticles is about 3~5nm.XRD diagram. The typical crystal planes of (111), (200), (220) and (311) of PD nanocrystalline particles are found in 3~5nm.XRD diagram. The results of desulphurization experiment showed that the mass fraction of sulfur in MTBE product could be reduced from 150 渭 g / g to less than 10 渭 g / g in 1 h by using batch reactor at 50 鈩，
本文编号：2139395
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