USY zeolite was modified by HF.

对usy分子筛进行HF改性实验。

LCH is a new generation USY zeolite cracking catalyst.

LCH催化剂是新一代超稳Y型分子筛催化裂化催化剂。

Upgrading of FCC gasoline was investigated in a fixed fluidized bed microreactor over USY, REY and REHY.

采用USY、REY和REHY分子筛为催化剂，在固定流化床上进行了催化裂化（FCC）汽油改性试验。

The effect of pressure on coke and its precursor's formation was studied during catalytic cracking of toluene over USY catalyst.

研究了压力对USY催化剂催化甲苯裂解结焦及其前驱体的影响。

The catalyst containing P-RE-USY exhibits excellent performance of reducing naphtha olefins, increasing diesel yield more than 2.31%.

评价表明含有这种改性沸石的催化剂显示了优越的降低汽油烯烃的效果，柴油产率可增加2.31%。

For FCC resid processing, USY zeolite is perferred because of its superior hydrothermal stability, vanadium resistance and coke selectivity compared to conventional zeolites.

超稳y分子筛的水热稳定性、抗钒性能和焦炭选择性都优于传统的沸石，适合作为渣油FCC催化剂的活性主体。

The thermal stability ofthe crystal structure of modified USY zeolite is increased, and n-hexane cracking activity ina pulse micro-reactor is decreased, while the olefin selectivity is increased.

改性后超稳Y型分子筛的晶体结构热稳定性增加，脉冲微反试验的正已烷裂解活性下降而烯烃选择性得到提高。