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首页> 外文期刊>RSC Advances >Recycling the CoMo/Al2O3 catalyst for effectively hydro-upgrading shale oil with high sulfur content and viscosity
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Recycling the CoMo/Al2O3 catalyst for effectively hydro-upgrading shale oil with high sulfur content and viscosity

机译：再循环COMO / AL2O3催化剂，以具有高硫含量和粘度的高压升级页岩油

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Hydrotreatment is an effective upgrading technology for removing contaminants and saturating double bonds. Still, few studies have reported the hydro-upgrading of shale oil, with unusually high sulfur (13200 ppm) content, using the CoMo/Al _(2) O _(3) catalyst. Here we report an extensive study on the upgrading of shale oil by hydrotreatment in a stirred batch autoclave reactor (500 ml) for sulfur removal and viscosity reduction. From a preliminary optimization of the reaction factors, the best-operating conditions were 400 °C, an initial H _(2) -pressure of 5 MPa, and an agitation rate of 800 rpm, a catalyst-to-oil ratio of 0.1, and a reaction time of 1 h. We could achieve a sulfur removal efficiency of 87.1% and 88.2% viscosity reduction under the optimal conditions. After that, the spent CoMo/Al _(2) O _(3) was repeatedly used for subsequent upgrading tests without any form of pre-treatment. The results showed an increase in the sulfur removal efficiency with an increase in the number of catalyst runs. Ultimately, 99.5–99.9% sulfur removal from the shale oil was achieved by recycling the spent material. Both the fresh and the spent CoMo/Al _(2) O _(3) were characterized and analyzed to ascertain their transformation levels by XRD, TEM, TG, XPS, TPD and N _(2) adsorption analysis. The increasing HDS efficiency is attributed to the continuing rise in the sulfidation degree of the catalyst in the sulfur-rich shale oil. The light fraction component in the liquid products (IBP–180 °C) was 30–37 vol% higher than in the fresh shale oil. The product oil can meet the sulfur content requirement of the national standard marine fuel (GB17411-2015/XG1-2018) of China.
机译：加氢处理是一种用于去除污染物和饱和双键的有效升级技术。尽管如此，仍有少数研究报告了岩油油的升级，具有异常高的硫（13200ppm）含量，使用COMO / Al _（2）O _（3）催化剂。在这里，我们报告了对搅拌批量高压釜反应器（500mL）中的加氢处理升级的岩土油的广泛研究，用于硫去除和粘度降低。从反应因子的初步优化，最佳操作条件为400°C，初始H _（2）缓和5MPa，搅拌速率为800 rpm，催化剂与油比为0.1，和1小时的反应时间。我们可以在最佳条件下达到87.1％和88.2％粘度降低87.1％和88.2％的粘度降低。之后，在没有任何形式的预处理的情况下重复使用废物COM / Al _（2）O _（3）进行后续升级试验。结果表明硫去除效率的增加随着催化剂的数量的增加而增加。最终，通过回收废料，实现了来自页岩油的99.5-99.9％硫去除。特征和分析新鲜和废的COMO / AL _（2）O _（3），以通过XRD，TEM，TG，XPS，TPD和N _（2）吸附分析来确定其转化水平。随着HDS效率的增加归因于富含硫的页岩油中催化剂的硫化程度的持续上升。液体产物（IBP-180℃）中的光馏分组分比新鲜页岩油高30-37体积％。产品油可以满足中国国家标准海洋燃料（GB17411-2015 / XG1-2018）的硫磺含量要求。

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