摘要
采用XRD、BET、NH3-TPD、H2-TPR、CO-IR、Raman等表征方法,详细考察了水热处理温度及助剂改性对加氢处理催化剂性质的影响,并以催化柴油为原料,评价了水热处理温度及助剂改性对加氢处理催化剂加氢脱硫、脱氮活性的影响。结果表明:基于助剂改性的水热处理可以有效地改善催化剂表面活性金属的存在状态,催化剂表面更容易形成八面体的Mo物种。评价结果表明,水热处理后的催化剂孔结构更为畅通,其加氢脱硫、脱氮活性显著提高;SRC-2和SRC-3的HDS活性明显提高,分别在93%和94%左右,较SRC-1的脱硫率提高了3~4个百分点。SRC-5的产物中,总芳烃质量分数最低为69.2%,总饱和烃质量分数最高为30.8%,其总饱和烃质量分数相比于原料和SRC-1的加氢产物分别提高11.3、7.3个百分点。
XRD,BET,NH3-TPD,H2-TPR,CO-IR,Raman and other characterization methods were used to investigate in detail the effects of hydrothermal treatment temperature and additive modification on the properties of hydrotreating catalysts.The effects of hydrothermal treatment temperature and additive modification on the hydrodesulfurization and denitrification activity of hydrotreating catalysts were evaluated using catalytic diesel as raw material.The results indicated that hydrothermal treatment based on additive modification could effectively improve the presence of active metals on the catalyst surface,making it easier to form octahedral Mo species on the catalyst surface.The evaluation results indicated that the pore structure of the catalyst after hydrothermal treatment was smoother,and its hydrodesulfurization and denitrification activities were significantly improved;The HDS activity of SRC-2 and SRC-3 significantly increased,at around 93%and 94%,respectively,which increased the desulfurization rate by 3~4 percentage points compared to SRC-1.Among the products of SRC-5,the lowest total aromatic mass fraction was 69.2%,and the highest total saturated hydrocarbon mass fraction was 30.8%.Compared with the raw material and the hydrogenation product of SRC-1,the total saturated hydrocarbon mass fraction increased by 11.3 and 7.3 percentage points,respectively.
作者
刘文洁
穆福军
隋宝宽
李雪婧
LIU Wenjie;MU Fujun;SUI Baokuan;LI Xuejing(Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian Liaoning 116045,China)
出处
《当代化工》
CAS
2024年第2期294-299,共6页
Contemporary Chemical Industry
基金
中国石化重点科技项目,加氢脱金属催化剂的生产技术优化(项目编号:121016)。
关键词
水热处理
助剂改性
加氢处理
催化剂
Hydrothermal treatment
Additive modification
Hydrotreating
Catalyst
