关键词: 管式炉, 裂解, 结焦抑制剂

Abstract: The effects of both alkali-metal salts such as potassium carbonate and organic sulfide-phosphate compounds such as CRShave been investigated on the pyrolysis of light gas oil with a continous flow laboratory pyrolysis unit. The effects of operating conditions such as temperature and the ratio of steam to oil etc. have also been investigated. The results show that the apparent rate of coke formation decreases by 30-70 percent by coating the inner wall of the reactor with 0. 002-0. 010 kg per square meter of potassium carbonate. If we add 0. 0001-0. 0005 kg/kg CRS in the feedstock, not only the rate of coke formation decreases by 20-50 percent, but also the state of deposited coke becomes fragible, and the yields of ethylene and propylene increase. In addition, according to the experimental results and some concepts from referenc articles, the mechanism of coking inhibition by inhibitors such as potassium carbonate and CRS has been discussed in detail.

Key words: Tube-f urnale, Pyrolysis, Coking inhibitors