多孔材料烷烃/烯烃分离技术的研究

Study on alkanes/olefin separation technology of porous material

以模拟油品为原料,在小型固定床(200mL)反应器上考察了硅胶、γ-Al2O3、13X分子筛、Y分子筛及ZSM-5分子筛等多孔材料对烷烃/烯烃的吸附分离性能;其中硅胶的烷烃/烯烃分离效果最好,在吸附温度为40℃、压力为0.5MPa、解吸剂为正辛烷/甲基环己烷的条件下,烷烃/烯烃分离度最高达到0.81;与其他类型硅胶相比,平均孔径为4~6nm的B型硅胶传质效果更好,吸附-脱附过程更易趋于平衡。经过焙烧和溶剂再生的吸附剂,与新鲜剂相比,分离效果没有明显的降低。

The adsorption and separation properties of porous materials such as silica gel,γ-Al2O3,13X molecular sieve,Y molecular sieve and ZSM-5 molecular sieve on alkane/olefin were investigated on a small fixed bed(200 mL) reactor using simulated oil as raw material.The alkane/olefin separation effect of silica gel was the best.Under the conditions of adsorption temperature of 40 ℃,pressure of 0.5 MPa and desorbent of n-octane/methylcyclohexane,the alkane/olefin separation degree was up to 0.81.Compared with other types of silica gel,type B silica gel with an average pore diameter of 4~6 nm had better mass transfer effect,and the adsorption-desorption process turned to be more balanced.The regenerated adsorbents by roasting and solvent,compared with fresh agent,the separation effect did not decreased obviously.