焦化粗苯加氢脱硫脱氮催化剂工艺条件研究

对研制的焦化粗苯预加氢催化剂HDA016和主加氢脱硫催化剂HDB017进行工艺条件试验，在预加氢温度180 ℃、主加氢温度270 ℃、液体流速0.15 L·h-1、氢油体积比600∶1、预加氢段液体空速1.88 h^-1、主加氢段液体空速0.75 h^-1和反应压力2.5 MPa条件下，进行催化剂连续寿命考察。结果表明，产品中硫含量低于0.7 mg·L^-1，氮含量约维持在1 mg·L^-1。采用压汞法对催化剂的比表面积以及孔结构进行测试，结果表明，预加氢催化剂HDA016比表面积219.3 m2·g-1，平均孔径1.56 nm，最可几孔径1.71 nm，孔容0.19 mL·g^-1；主加氢催化剂HDB017比表面积196.6 m²·g^-1，平均孔径1.58 nm，最可几孔径1.88 nm，孔容0.15 mL·g^-1。XRD测试结果显示，活性金属组分负载在γ-Al2O3上，达到了非常高的分散度。

Research on the process conditions of the catalysts for hydrogenation desulfurization and denitrification of coking crude benzol

The process condition experiments of the catalysts for coking crude benzol hydrogenation desul-furization were carried out. Under the condition of prehydrogenation temperature 180℃,main hydrogenation temperature 270 ℃,liquid flow rate 0. 15 L·h-1 ,volume ratio of hydrogen to oil 600：1,liquid airspeed of preliminary and main reactor 1. 88 h-1 and 0. 75 h-1 respectively,and reaction pressure 2. 5 MPa,the continuous life span experiments of HDA016 and HDB017 catalysts were investigated. The results indicated that the sulfur content and the nitrogen content in the product were less than 0. 7 mg·L-1 and 1 mg·L-1 , respectively. The specific surface area and pore structure of the catalysts were characterized by mercury injection method. The results showed that specific surface area of 219. 3 m2 ·g-1,average pore size of 1. 56 nm,most probable aperture 1. 71 nm and pore volume 0. 19 mL·g-1 of HDA016 prehydrogenation catalyst were attained;The specific surface area,average pore size,most probable aperture and pore vol-ume of HDB017 hydrogenation catalyst reached 196. 6 m2 ·g-1 ,1. 58 nm,1. 88 nm and 0. 15 mL·g-1 , respectively. The results of XRD characterization showed that the active metal component loaded onγ-Al2 O3 possessed a very high degree of dispersion.