四氢萘加氢裂化反应规律研究

Study on reaction rules of tetralin hydrocracking

以四氢萘为模型化合物原料,采用加氢精制剂和裂化剂分级配比的模式,在高压微反固定床装置上进行加氢裂化反应。采用XRD、N_(2)吸附-脱附、TEM和NH_(3)-TPD方法对加氢精制剂和裂化剂进行了表征,并基于4因素6水平的正交实验,研究了采用不同酸量裂化剂时反应条件对加氢裂化产物收率的影响。实验结果表明,生产汽油的最佳反应条件是No.1裂化剂,反应温度360℃、反应压力8 MPa、氢油体积比600、质量空速3.5 h^(-1),最高汽油收率为11.13%;加氢反应的最佳反应条件是No.1裂化剂、反应温度405℃、反应压力7 MPa、氢油体积比400、质量空速2.0 h^(-1),最高加氢产物收率为32.21%;异构反应的最佳反应条件是No.1裂化剂、反应温度390℃、反应压力10 MPa、氢油体积比400、质量空速3.5 h^(-1),最高异构产物收率为35.03%;脱氢反应的最佳反应条件是No.2裂化剂、反应温度330℃、反应压力5 MPa、氢油体积比800、质量空速2.5 h^(-1),最低脱氢产物收率为0.62%。

Using tetralin as the model compound feedstock,the hydrocracking reaction was carried out in a high-pressure fixed bed micro-reactor by using the mode of graded matching of hydrotreating agent and cracking agent.The hydrotreating agent and cracking agent were characterized by XRD,N_(2) adsorption-desorption,TEM and NH_(3)-TPD.The effect of reaction conditions on the product yield of the hydrocracking reaction with different acid amount cracking agents was investigated through orthogonal experiments based on 4 factors and 6 levels.The results show that the optimal conditions are as follows:for gasoline production,using cracking agent No.1,reaction temperature 360℃,reaction pressure 8 MPa,volume ratio of H_(2)/oil 600 and WHSV 3.5 h^(-1);for hydrogenation reaction,using cracking agent No.1,reaction temperature 405℃,reaction pressure 7 MPa,volume ratio of H_(2)/oil400 and WHSV 2.0 h^(-1);for isomerization reaction,using cracking agent No.1,reaction temperature 390℃,reaction pressure 10 MPa,volume ratio of H_(2)/oil 400 and WHSV 3.5 h^(-1);for dehydrogenation reaction,using cracking agent No.2,reaction temperature 330℃,reaction pressure 5 MPa,volume ratio of H_(2)/oil 800 and WHSV 2.5 h^(-1).Under these conditions,the highest yield of gasoline,hydrogenation product,isomerization product,and the lowest yield of dehydrogenation product are 11.13%,32.21%,35.03%,and 0.62%,respectively.