摘要
几种生产工艺和方法不同的5A分子筛(5A-0、5A-2、5A-4)对正癸烷和正十四烷表现出不同的吸附性能,且对含氮,含氧及烯烃等有机物质的影响表现出不同的抗毒性能.在脱蜡过程中失活程度也有不同,5A-2分子筛失活后,蜡收率下降到原来的70%.5A-4分子筛失活后,蜡收率下降到原来的50%.为了分析其原因,采用了XRD、SEM、FABMS、TPD及IR等方法对这几种不同的5A分子筛的结构、阳离子作用及表面酸性作了初步研究及性能上的剖析,从而得出了5A-0、5A-2、5A-4几种分子筛的差距所在.
It has been found that 5A zeolites prepared by different techniques an methods have different properties on the adsorption of n-decane and n-tetradecane.Preadsorption of organic N and O compounds and olefins on the samples affects their adsorbabilities of n-decane and n-tetradecane.Thus,their deactivation during dewaxing process are also different.Samples of 5A zeolites has been characterized by XRD,SEM,FABMS,IR and TPD,and their differences in structures,cation sites and surface acidities are discussed.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1990年第4期8-14,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
