摘要
按照单位体积搅拌功率恒等的放大准则,采用不同规格的反应釜以溶胶凝胶法(sol-gel)制备Ti O2-Al2O3复合载体;依据还原气体线速度恒等的放大准则,在不同规格管式炉中以程序升温还原法(TPR)制备Ni2P/Ti O2-Al2O3催化剂,并在连续固定床反应器中考察催化剂的加氢脱硫性能,以研究凝胶、TPR这两个催化剂制备关键过程的"放大效应"。结果表明,放大制备的载体物化性质与小试结果相当,放大制备的催化剂在温度603 K、压力2.5 MPa、质量空速2 h?1、氢油体积比500的条件下对含硫量为0.1%(wt)的二苯并噻吩(DBT)/环己烷溶液进行90 h的加氢脱硫反应,转化率达到99.4%,模型油品中硫含量降至6 ppm,其结果也与小试相同,表明上述载体以及催化剂制备工艺可靠、重复性好,有望实现规模化制备。
Reactors with different specifications were used to prepare TiO 2-Al2O3 composite supports by a sol-gel method（sol-gel）. The scale-up process was followed the criterion of identical stirring power per unit volume. Tube furnaces with different sizes were used to prepare Ni2P/Ti O2-Al2O3 catalysts by a temperature-programmed reduction（TPR） method in accordance with the scale-up criterion of identical reducing gas flow rate. The hydrodesulfurization performance of the catalysts was examined using a continuous fixed-bed reactor to investigate the ＂scale-up effect＂ in gelation and TPR processes（two key processes in catalyst preparation）. The results show that the physical properties of the supports prepared in large scale is close to that prepared in small scale. Hydrodesulfurization at 603 K, 2.5MPa, WHSV 2 h？1 and hydrogen/oil volume ratio of 500 for 90 h shows that the catalysts prepared in large scale achieves a conversion rate of 99.4%. The sulfur content in the model oil was reduced to 6 ppm, which was the same as the lab-scale test results. These results show that the preparation processes of the support and the catalyst are reliable and repeatable, and the scale-up of the catalyst is possible.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2015年第2期305-311,共7页
Journal of Chemical Engineering of Chinese Universities
基金
陕西省科技统筹创新工程计划项目(2012KTCL01-09)
关键词
溶胶凝胶法
程序升温还原
磷化镍
加氢脱硫
制备放大
sol-gel method
temperature-programmed reduction
nickel phosphide
hydrodesulfurization
preparation scale-up
