稀土改性对HZSM-5沸石催化性能的影响

The effect of La_2O_3 modification on the catalytic property of the HZSM-5 zeolite

对HZSM - 5沸石进行稀土改性。随着稀土载入量的增多 ,沸石的总酸量下降 ,强酸所占比例减少 ,因而使烯烃与异构化产物增多 ,提高了汽油辛烷值。稀土载入量应以 4%为宜。

The effect of La 2O 3 modification on HZSM-5 zeolites was studied. As the content of La 2O 3 in the zeolite increased, the acid amount in the zeolite decreased, so did the percentage of strong acids. As a result, alkene and iso-products increased, leading to a rise in gas octane value. The optimal content of La 2O 3 was found to be 4%.