关键词: 测量, 固含量, 过滤, 离心分离, 灰分, 炭化灼烧

Abstract: So far there has not been an universal standard in determining solids content in catalytic cracking slurry oil. Comparisons between current determination methods were seldom reported. In order to provide guidance to the selection of solids content determination methods,the accuracy and precision of four solids content determination methods including filtration,centrifugation,ash analysis and burning method were systematically analysed by experiments,after which the filtration method was further optimized in selection of filter material and dilution solvent. The results showed that filtration method is of both high accuracy and precision and can reflect both catalysts and coke powders contents in slurry oil. The determination result of centrifugation method is too large,with both low accuracy and precision. The determination results of ash analysis and burning method are too small,with high precision but low accuracy. When using filtration method to determine solids content,choosing slow quantitative filter paper as filter material will meet normal accuracy requirements and choosing organic filter membrane with bore diameter of 0.22μm can meet the higher ones. Besides,an aromatic solvent such as toluene can be used as dilution solvent in filtration method.

Key words: measurement, solids content, filtration, centrifugation, ash analysis, burning method