介孔分子筛HMS负载磷钨酸催化剂的制备及其氧化脱硫性能研究

发布时间：2018-04-21 18:38

  本文选题：杂多酸催化剂 + 磷钨酸　； 参考：《能源化工》2016年05期

【摘要】：杂多酸催化剂同时具有酸性和氧化性,用于轻质燃料油的氧化脱硫具有很好的效果。以十二胺为模板剂,磷钨酸为活性组分,介孔分子筛HMS为载体,分别采用浸渍法和一步合成法制备了负载型HPW/HMS催化剂。对催化剂进行了FT-IR和SEM分析表征,考察了催化剂制备条件和反应条件对其脱硫活性的影响。结果表明:采用一步合成法制备的HPW/HMS催化剂,其脱硫效率高于浸渍法制备的催化剂;与焙烧法相比,通过溶剂萃洗去除一步合成法制备过程中的模板剂,得到的催化剂脱硫率更高;HPW/HMS催化剂仍然保持磷钨酸的Keggin结构,能有效催化氧化二苯并噻吩(DBT);在反应温度50℃,反应时间60 min,催化剂质量0.02 g,H2O2体积0.1 m L的条件下,DBT脱除率达到96.5%。
[Abstract]:Heteropoly acid catalyst has both acid and oxidation properties, so it has a good effect for oxidative desulfurization of light fuel oil. Using dodecylamine as template, phosphotungstic acid as active component and mesoporous molecular sieve HMS as carrier, supported HPW/HMS catalysts were prepared by impregnation method and one-step synthesis method, respectively. The catalysts were characterized by FT-IR and SEM. The effects of preparation conditions and reaction conditions on the desulfurization activity of the catalysts were investigated. The results show that the desulfurization efficiency of the HPW/HMS catalyst prepared by one-step synthesis method is higher than that of the catalyst prepared by impregnation method, and the template in the one-step synthesis process is removed by solvent extraction washing compared with the calcination method. The obtained catalyst still maintains the Keggin structure of phosphotungstic acid and can effectively catalyze the oxidation of dibenzothiophene dithiophene dithiophene (DBT) at 50 鈩，

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