改性Y型分子筛对硫醇硫醚的吸附脱除研究

发布时间：2018-04-09 21:12

本文选题：Y型分子筛　切入点：硫醇　出处：《燃料化学学报》2017年12期

【摘要】：通过液相离子交换法制备了Cu(I)Y、Ni Y、Ce Y分子筛,以XRD、低温N2吸附-脱附、NH3-TPD、吡啶红外Py-FTIR等方法对其进行物性表征。利用固定床技术、WK-2D微库伦仪及硫化学发光检测GC-SCD色谱评价了改性分子筛对于硫含量300μg/g模拟油(含硫化合物二丙硫醚、环己硫醇和1-庚硫醇与壬烷配制)及HDS汽油的吸附脱硫性能。结果表明,吸附剂对模拟油和HDS燃料油品中硫醇硫醚具有吸附效果,且改性后的分子筛在吸附脱硫过程中,强的B酸对于吸附脱硫有负作用,会使油品中硫醇硫醚发生催化反应,聚合的大分子硫化物遮盖及阻塞吸附活性位点,从而使吸附剂不能够完全地吸附硫化物,造成吸附硫容较小,而弱L酸无催化活性对吸附脱硫有正面影响。
[Abstract]:The molecular sieves of CuOI _ (I) Y _ ((Y)) Ni (Y) ce _ (Y) were prepared by liquid phase ion exchange method, and their physical properties were characterized by XRD, N _ 2 adsorption and desorption of NH _ 3-TPD at low temperature, and pyridine infrared Py-FTIR.The modified molecular sieve was used to evaluate the effect of modified molecular sieve on sulfur content of 300 渭 g / g simulated oil (disulfide) by WK-2D microcoulometry and sulfur chemiluminescence detection (GC-SCD).Cyclohexanethiol and 1-heptylmercaptan and nonane) and HDS gasoline adsorption desulfurization performance.The results show that the adsorbent can adsorb mercaptan thioether in the simulated oil and HDS fuel oil, and the strong B acid has negative effect on the adsorption desulfurization of the modified molecular sieve in the process of adsorption and desulfurization.Mercaptan thioether in oil will be catalysed, polymerized macromolecular sulfides will cover up and block adsorption sites, thus the adsorbent will not be able to completely adsorb sulfides, resulting in a smaller sulfur adsorption capacity.Weak L acid has a positive effect on adsorption desulfurization without catalytic activity.
【作者单位】：中石油克拉玛依石化有限责任公司;辽宁石油化工大学石油化工催化科学与技术重点实验室;中国石油大学(华东)化学化工学院;
【分类号】：TE624.5;TQ424.25

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