元素分析仪测定石油炼制催化剂积炭含量的研究和应用

Research and application of elemental analyzer for determination of carbon content in petroleum refining catalysts

采用元素分析仪建立了一种石油炼制催化剂中积炭含量的测定方法,通过高温燃烧将催化剂中的积炭完全氧化为二氧化碳,排除干扰气体后,送入热导检测器定量检测。通过选择合适的标准物质绘制标准曲线,使得该方法适用于几乎所有的石油炼制催化剂。通过调整仪器参数,确定了最佳工作条件,得出试样量为2~20mg、通氧时间为80~140s,且针对不同积炭含量选取合适条件时效果最佳。选取不同类型的催化剂样品进行了方法对比实验,通过T检验得出两者不存在显著性差异,通过加标回收试验考察了方法的准确性。实验结果表明,本方法操作简便,测定结果准确可靠,广泛适用于各种类型的石油炼制催化剂。

An analytical method was developed for determination of carbon content in petroleum refining catalysts by using elemental analyzer.The carbon in the catalyst was completely oxidized to carbon dioxide by means of high temperature combustion,and carbon dioxide was quantitatively detected by thermal conductivity detector.The method was suitable for almost all petroleum refining catalysts by selecting the appropriate standard substance to draw the standard curve.The optimum working conditions were determined by adjusting the parameters of the instrument,the sample size was 2—20mg,the oxygen delivery time was 80—140s,and the best results were obtained when appropriate conditions were selected for different carbon content.Different kinds of catalyst samples were selected for comparison experiment,and no significant difference was found by T-test.The accuracy of this method was investigated through the standard recovery test.The experimental results showed that this method was simple to operate,accurate and reliable,and widely applicable to all kinds of petroleum refining catalysts.