PEC-21催化剂在兰州石化应用情况分析.

The front-end hydrogenation of acetylene catalyst PEC-21 independently developed by PetroChina has been operated in the 460 X 10³ t/a unit of the Lanzhou Petrochemical Plant for 11 months. The effects of complex cracking materials, high C4 's content and fluctuations in space velocity on the performance of the catalyst were analyzed. Industrial application results showed that PEC-21 catalyst had good space velocity adaptability and C4 es adaptability, and could fully meet the operation conditions of the industrial installation. The acetylene average conversion rate, ethylene selectivity, MAPD conversion rate, and propylene selectivity reached 52.3%, 90.4%, 12.9% and 95.2%. respectively after it had been operating continuously for 11 months. And for one year of operation, the temperature increased from 61-63 t to 68.8 t, with the temperature rising of about 6.6 t. The performance of the catalyst was much better than that of the imported catalyst in the same period and could meet the requirements of stable operation of the unit. [ABSTRACT FROM AUTHOR]