大庆炼化石脑油加氢预脱砷的实验研究

Study on the experiment of Daqing petrochemical naphtha hydrotreating arsenic pre-removal

运用分光光度法快速测定原料油和产品油中的砷含量的方法考查了DZAs-1型加氢脱砷剂对大庆炼化石脑油中砷的脱除效果,通过设计单因素实验,分别讨论了反应温度、反应压力、体积空速、剂油比(M/M)等操作条件对脱砷效果的影响,结果显示,脱砷率随反应温度的不断升高而先增大后趋于稳定;脱砷率随反应压力的增大而先增大后缓慢较小;脱砷率随体积空速的增大而逐渐减小;脱砷率随剂油比的增大而先增大后趋于稳定,确定了脱砷工艺的最佳条件:当氢油体积比为100:1,反应温度为225℃,反应压力为2.0 MPa,体积空速为≤10.0 h-1,剂油比(M/M)为15 mg/L时,在不同时间间隔下采样,分别测定残留砷含量,脱砷率可达99%以上,该加氢脱砷剂脱砷活性高且稳定。

By using the spectrophotometric method to determine the arsenic content of raw oil and product oil rapidly and then tested arsenic removal efficiency by DZAs-1 type of hydrodeararsenic to deal with Daqing refining naphtha, through the single factor experiments,discussed the reaction temperature, pressure, volume airspeed, oil ratio（M/M）and other operating conditions on the effects of arsenic removal, the results showed that arsenic removal rate appear after the first increases stabilized with rising temperature, arsenic removal rate appear after the first increases smaller slow with increasing pressure, arsenic removal rate decrease gradually with increasing volume space velocity, the first arsenic removal rate increases with increasing oil ratio stabilized after, determine the optimum conditions for arsenic removal process, when the hydrogen to oil volume ratio of 100：1, the reaction temperature is 225 ℃, the reaction pressure is 2.0 MPa, volume space velocity ≤10.0 h-1, oil ratio（M/M）is 15 mg/L, the arsenic removal rate up to 99 % off, the arsenic removal activity of the hydrodeararsenic is high and stable.