磷改性制备微晶蜡加氢精制催化剂
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摘要
采用磷元素对载体进行改性,并制备出微晶蜡加氢精制催化剂,考察了磷元素对载体和催化剂性能的影响,在滴流床加氢试验装置上进行了催化剂加氢活性和稳定性评价实验。结果表明:磷元素可使载体表面L酸转化为B酸,提高了催化剂加氢活性,还能有效提高催化剂上活性金属的分散性,使催化剂的高、低温还原峰向低温方向移动,有利于形成高活性催化中心;磷改性催化剂加氢产品的含油量、颜色、光安定性、稠环芳烃含量等指标优于未改性催化剂,活性稳定性可满足工业应用要求。
The microcrystalline wax hydrofining catalyst was prepared by the carrier modified by phosphorus modification, the influences of phosphorus on the performance of the carrier and catalyst were investigated, and the hydrogenation activity and stability of catalyst were evaluated in a trickle bed hydrogenation test device. The results showed that phosphorus could change acid L of carrier surface into acid B, improving the activity of the catalyst hydrogenation and the activity of catalyst on the dispersion of the metal effectively, making the reduction peak of catalyst high and low temperature move to the low temperature direction, which was helpful to form a highly active catalytic center. The oil content, color, light stability, polycyclic aromatic hydrocarbon content of hydrogenation products produced by phosphorus modified catalyst, were better than those of the unmodified catalyst, and the active stability could meet the requirements of industrial application.
The microcrystalline wax hydrofining catalyst was prepared by the carrier modified by phosphorus modification, the influences of phosphorus on the performance of the carrier and catalyst were investigated, and the hydrogenation activity and stability of catalyst were evaluated in a trickle bed hydrogenation test device. The results showed that phosphorus could change acid L of carrier surface into acid B, improving the activity of the catalyst hydrogenation and the activity of catalyst on the dispersion of the metal effectively, making the reduction peak of catalyst high and low temperature move to the low temperature direction, which was helpful to form a highly active catalytic center. The oil content, color, light stability, polycyclic aromatic hydrocarbon content of hydrogenation products produced by phosphorus modified catalyst, were better than those of the unmodified catalyst, and the active stability could meet the requirements of industrial application.
引文
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[10]AL D K,Aravind B,Stanislaus A.Influence of complexing agents on the adsorption of molybdate and nickel ions on alumina[J].Applied Catalysis A( General),2005,296(1):49-53.
[2]张明伟,宋纪蓉,马海霞,等.磷改性NiW/γ-Al2O3催化剂加氢处理低温煤焦油[J].石油化工,2017,46(9):1132-1137.
[3]刘丽芝,宋君辉,金吉海,等.磷改性USY分子筛催化剂上四氢萘选择性开环反应性能[J].工业催化,2018,26(6):34-38.
[4]李鹤鸣,李东胜,富玉,等.磷含量对非负载型Ni-Mo-W加氢处理催化剂性能影响的研究[J].天然气化工,2016,41(6):72-77.
[5]刘其海,周红军,胡文斌,等.磷钼酸改性Ni催化剂上秸秆液化油的加氢脱氧研究[J].天然气化工,2017,42(4):11-16.
[6]曾鹤,施岩,李鹤鸣,等.氧化铝和磷改性对非负载型催化剂结构和加氢脱硫性能的研究[J].应用化学,2016,33(8):951-959.
[7]Ding Lianhui,Zheng Ying,Zhang Zisheng,et al.Hydrotreating of light cycled oil using WNi/Al2O3 catalysts containing zeolite beta and/or chemically treated zeolite Y[J].Journal of Catalysis,2006,241(2):435-445.
[8]Ding Lianhui,Zheng Ying,Zhang Zisheng,et al.Hydrotreating of light cycle oil using WNi catalysts containing hydrothermally and chemically treated zeolite Y[J].Catalysis Today,2007,125(3):229-238.
[9]沈志虹,潘惠芳,徐春生.镁对γ-Al2O3表面酸性及积炭性能的影响[J].石油大学学报(自然科学版),1995,19(3):79-82.
[10]AL D K,Aravind B,Stanislaus A.Influence of complexing agents on the adsorption of molybdate and nickel ions on alumina[J].Applied Catalysis A( General),2005,296(1):49-53.