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Precipitation, fractionation and characterization of asphaltenes from heavy and light crude oils

机译:重质和轻质原油中沥青质的沉淀,分馏和表征

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摘要

Asphaltenes of Maya and Isthmus crude oils were precipitated, fractionated and characterized in this work. Isolation of asphaltenes was performed by following the ASTM D3279 method, which uses n-heptane for solvent precipitation. Asphaltenes were separated into three fractions by Soxhlet extraction with a binary solvent system of toluene and n-heptane. C, H, O, N, S, and Ni and V contents were determined in asphaltenes and in their fractions by elemental analysis and atomic absorption, respectively. VPO aggregate weight and NMR measurements were also performed in all samples. Important differences in properties of unfractionated asphaltenes and asphaltenes fractions were observed. Some of these differences were attributed to impurities in the unfractionated asphaltenes.
机译:在这项工作中,玛​​雅和地峡原油的沥青质沉淀,分馏并进行了表征。沥青质的分离是按照ASTM D3279方法进行的,该方法使用正庚烷进行溶剂沉淀。通过用甲苯和正庚烷的二元溶剂系统进行索氏提取将沥青质分为三部分。分别通过元素分析和原子吸收法测定沥青质及其馏分中的C,H,O,N,S和Ni和V的含量。在所有样品中还进行了VPO聚集体重量和NMR测量。观察到未分级的沥青质和沥青质馏分的性质存在重要差异。这些差异中的一些归因于未分级的沥青质中的杂质。

著录项

  • 来源
    《Fuel》 |2004年第16期|p.2169-2175|共7页
  • 作者单位

    Programa de Tratamiento de Crudo Maya, Institute Mexicano del Petroleo, Eje Central Ldzaro Cardenas 152, Col. San Bartolo,Atepehuacan, DF 07730 Mexico, Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 燃料化学工业(总论);
  • 关键词

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