[BMIM]Cl离子液体改性埃洛石为基质制备大孔RFCC助剂

Ionic liquid of[BMIM]Cl modified halloysite as matrix for preparation of macroporous RFCC additives

以氯化1-丁基-3-甲基咪唑([BMIM]Cl)离子液体改性埃洛石为基质,以USY为主剂制备了大孔渣油催化裂化(RFCC)助剂,采用XRD、N2吸附、SEM等手段对制备的助剂进行了表征,以济南FCC原料油为原料,以济南平衡剂为主剂在固定流化床(ACE-MODEL R+MM)上测定了助剂的反应性能。结果表明,在助剂的制备过程中,将离子液体先嫁接到具有开放大孔管状结构的埃洛石上,有效阻止了分子筛碎屑、黏结剂等占据埃洛石的管道及其活性位,高温焙烧去除离子液体后,保留了埃洛石的大孔结构,使制得的助剂具有高的催化裂化活性和良好的汽油选择性。

The residue fluid catalytic cracking （RFCC） additives containing macropores were prepared with1-butyl-3-methylimidazolium chloride （[BMIM] Cl） of room temperature ionic liquid modified halloysite asmatrix and the USY zeolite as base. X-ray powder diffraction and N2 adsorption-desorption were employed forcharacterization of the crystallinity and macroporous structure of RFCC additives. The performance of RFCCadditives were carried out over a confined fluidized bed fluidized bed （ACE-MODEL R＋ MM） with Jinan FCCfeedstock and Jinan FCC balance catalyst. It was found that the ionic liquid strongly interacted with the surfacehydroxyl of halloysite firstly during the preparation of RFCC additives, and then the strong interaction betweenionic liquid and halloysite effectively prevented the binder and USY zeolite to enter the inner of nano-tube ofhalloysite. At last, the macropores in RFCC additives were produced when the additives were calcinated and theionic liquid was removed at higher temperature. The resulting macroporous additive exhibited good catalyticcracking activity and high yield of gasoline.