锦州20-2终端轻烃回收制冷工艺方案比选研究

采用pH值摆动法、并流沉淀法制备了Al2O3、TiO2-Al2O3二元复合物、TiO2-MgO-Al2O3和MgO-TiO2-Al2O3三元复合物,并对以其为载体的催化剂进行了催化裂化重汽油加氢脱硫反应性能评价。结果表明,在所制备的TiO2-Al2O3二元复合载体中,TiO2分散在Al2O3表面上,且随其含量的增加TiO2逐渐在Al2O3表面上富集;与TiO2-Al2O3二元复合载体相比,三元复合载体的总孔容和平均孔径减小,但是总酸量增加。相比较而言,TiO2-MgO-Al2O3三元复合载体基催化剂对催化裂化重汽油的脱硫率优于TiO2-Al2O3二元复合载体基催化剂,脱硫率在90%以上,且前者的烯烃饱和率也较低,表明该催化剂具有良好的加氢脱硫选择性。

Refrigeration scheme comparison of NGL recovery process in Jinzhou 20-2 gas processing plant

A series of Al2O3, TiO2-Al2O3 and TiO2-MgO-Al2O3 oxides were prepared by the pH swing method and the paralleled flow precipitation method, respectively, and their supported hydrodesulfurization catalysts for the hydro-upgrading of heavy fluid catalytic cracking naphtha were assessed. The characterization results showed that in the binary TiO2-Al2O3 supports, TiO2 is dispersed on the surface of Al2O3 and there is a surface enriching tendency of TiO2 with the increasing TiO2 content; compared with binary TiO2-Al2O3 supports, trinary TiO2-MgO-Al2O3 supports have relatively smaller pore volumes and diameters but higher acid amounts. The catalytic assessment results revealed that the catalysts supported on trinary TiO2-MgO-Al2O3 ox- ides demonstrated better hydrosulfurization performance, and gave a desulfurization ratio of 90% while presenting a lower olefin saturation.