考察了中石油自主开发的碳二前加氢催化剂PEC-21在大庆石化270 kt装置一段反应器35个月的运行情况，并与同周期进口催化剂运行性能进行了对比。工业应用结果表明，PEC-21催化剂35个月平均乙炔转化率56.7%，乙烯选择性94.4%，提温幅度仅19℃，比同周期进口剂低7.5℃。在CO含量200~1 200 μL/L，进料量63.6~78.5 t/h的波动工况下显示出良好的长周期运行稳定性。

The catalyst for front-end hydrogenation of acetylene independently developed by PetroChina Company Limited has been operated continuously for 35 months in the 270 kt/a plant of PetroChina Daqing Petrochemical Company,which is compared with the performance of imported catalysts in the same cycle.Industrial application results show that PEC-21 catalyst has given an average acetylene conversion rate of 56.7% in 35 months,an ethylene selectivity of 94.4%,and a temperature increase of only 19℃,which is 7.5℃ lower than that of the imported catalyst in the same cycle.Under the fluctuating operating conditions with a CO content of 200-1 200 μL·L^-1 and a feeding speed of 63.6-78.5 t·h^-1,it shows good long-term running stability.