苏丹高酸原油两段催化裂化初步研究

A preliminary study on catalytic cracking of Sudanese high TAN crude oil

在小型提升管催化裂化实验装置上进行了苏丹高酸原油两段提升管催化裂化的实验研究,考察了LTB-2催化剂和ZC-7300催化剂对苏丹高酸原油的催化裂化效果。结果表明苏丹高酸原油虽然性质较差,但是很容易催化裂化。苏丹高酸原油在ZC-7300催化剂上的转化率很高,但产物分布较差,尤其是柴油的收率太低;采用LTB-2催化剂时,苏丹高酸原油的转化率较低,但柴油和低碳烯烃的收率较高,同时可以完全脱除其中的石油酸。在丙烯产率高达20.18%的情况下,柴油收率可以达到21.63%,而且汽油的烯烃含量非常低。由于原料的残炭很高,焦炭的产率非常高,将增加烧焦负荷。

A study on two-stage riser catalytic cracking of Sudanese high TAN crude oil is carried out in the miniriser experimental unit. LTB-2 and ZC-7300 are used as the catalysts. The experimental resuhs show that Sudanese high TAN crude oil is very easy to crack over the catalysts. The conversion of Sudanese high TAN crude oil is very high over ZC-7300 catalyst, but the distribution of products is not very good, with the yield of diesel very low. However, the yields of diesel and light olefins are higher over LTB-2 catalyst though the conversion of Sudanese high TAN crude oil is lower than that over ZC-7300 catalyst. Petroleum acids in Sudanese high TAN crude oil can react completely over this catalyst. The yield of diesel is 21.63% and of propylene reaches up to 20. 18% ,with olefins content in gasoline being very low. Because of the high carbon residue of the feedstock, the yield of coke is very high. This will increase the charge of burning coke.