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委内瑞拉减渣供氢热转化中沥青质结构变化研究

Qi WANG,Lei GUO,Zong-xian WANG,He LIU,Hong-yan LI,Bao-quan MU,Ai-jun GUO

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology（2013）

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Abstract
以委内瑞拉减压渣油为原料,在高压反应釜内考察了反应温度425℃时不同反应时间下常规热转化与供氢热转化反应前后沥青质的平均相对分子质量、元素组成、氢类型分布及其平均结构参数变化.结果表明,与常规热转化相比,反应时间相同时,供氢热转化过程所得残渣油沥青质平均相对分子质量较低,S/C原子比较低,而H/C原子比及活泼性氢量较高.供氢剂能够在热转化过程中降低残渣油沥青质的芳碳率,提高其环烷碳率及环烷环与芳香环的比值,从而延缓其相分离及生焦过程.
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Key words
Asphaltene,Average molecular weight,Average structural parameters,Elemental analysis,Thermal conversion
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