MIP-CGP专用催化剂CGP-1的积炭选择性特点

THE COKE SELECTIVITY CHARACTERISTICS OF SPECIAL CATALYST CGP-1 USED IN MIP-CGP PROCESS

采用新型制备工艺,特别是通过对基质的改性开发出的MIP-CGP工艺专用催化剂CGP-1,可以选择性控制积炭沉积位置,其积炭后的催化剂仍保持较好的反应性能。孔分析及氩离子(Ar+)刻蚀实验结果表明,CGP-1待生剂中的炭主要沉积在基质的中孔(2-8 nm)中,很好地保护了催化剂的活性中心,这也与红外吡啶吸附酸性分析结果相符。因此,催化剂CGP-1在MIP-CGP装置的第二反应区中能够很好地裂化小分子烯烃,从而达到在降低汽油烯烃的同时多产丙烯的目标。

The special catalyst CGP-1 used in MIP-CGP process, which was prepared by novel technique, especially by the modification of matrix, can control the coke deposited location selectively, leading to the considerable activity of spent catalyst. It is proved by Ar^＋ sputtering experiment that carbon mainly deposits in the mesopores of matrix （2-8 nm） in catalyst CGP-1, leading to the active sites well protected, which is also in accord with the acidity analysis result that more strong acids are reserved in spent CGP-1 compared to the Cat-A used in this process before special CGP-1 used. Therefore, the activity of CGP-1 in the second reaction zone is obviously enhanced to produce clean gasoline and more propylene simultaneously.