Ga、P改性对辛烷值助剂芳构化性能的影响

EFFECT OF OCTANE NUMBER PROMOTER MODIFIED WITH GALLIUM AND PHOSPHORUS ON AROMATIZATION PERFORMANCE

采用金属Ga以及P元素对辛烷值助剂进行改性,并采用一系列方法对催化剂进行表征,同时采用固定流化床装置对催化剂进行性能评价,考察金属Ga以及P元素对催化剂物化性质和对汽油芳烃选择性的影响。结果表明:采用金属Ga改性催化剂后,可以提高催化剂的芳构化能力,有利于汽油辛烷值的提高;在金属Ga改性催化剂中再引入P元素后,P与金属Ga发生相互作用,减弱了催化剂的芳构化能力,但是催化剂B酸中心增加,有利于提高产物的低碳烯烃选择性。

Octane number promoters were modified by the addition of gallium and phosphorus through impregnation.The catalyst was characterized by a series of analysis methods,and the performance of the catalyst was evaluated by a fixed fluidized bed reactor.The effects of gallium and phosphorus on the physical and chemical properties of the catalysts modified with gallium and on the selectivity of gasoline aromatics were investigated.The results showed that the aromatization ability of the catalyst modified with gauium could be improved and the octane number of gasoline could be increased.After the gallium modified catalyst was reintroduced with phosphorus,phosphorus interacts with gallium,which weakens the aromatization ability of the catalyst,but the increase of B acid center is beneficial to the increase of the selectivity of low-carbon olefins.