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Study of Brazilian asphaltene aggregation by Nuclear Magnetic Resonance spectroscopy

机译：核磁共振波谱法研究巴西沥青质聚集体

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摘要

Nuclear Magnetic Resonance experiments were used to study the relationship between the structural type (continental or archipelago) and aggregation properties of three different asphaltenes (asph_A, asph_B and asph_C). Diffusion-ordered NMR spectroscopy (DOSY) was applied to investigate the diffusion coefficients. The self-diffusion of the asphaltene aggregates was investigated in the concentration range of 0.01-10% of each asphaltene in deuterated toluene. Data obtained from ~1H and ~(13)C NMR indicate that asph_B has a predominantly continental type of structure. This contributes to different properties of aggregation. DOSY shows the presence of three aggregates, with three different diffusion coefficients, called nanoaggregate, microaggregate and macroaggregate.
机译：核磁共振实验用于研究三种不同沥青质（asph_A，asph_B和asph_C）的结构类型（大陆或群岛）与聚集特性之间的关系。扩散有序核磁共振波谱（DOSY）用于研究扩散系数。在氘代甲苯中，每种沥青质的浓度范围为0.01-10％，研究了沥青质聚集体的自扩散。从〜1H和〜（13）C NMR获得的数据表明asph_B具有主要的大陆型结构。这有助于聚合的不同属性。 DOSY显示存在三种聚集体，具有三种不同的扩散系数，分别称为纳米聚集体，微观聚集体和宏观聚集体。

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  • 来源
    《Fuel》 |2014年第ptaa期|146-151|共6页
  • 作者

    Emanuele Catarina da Silva O1iveira; Alvaro Cunha Neto; Valdemar Lacerda Junior; Eustaquio Vinicius Ribeiro de Castro; Sonia Maria Cabral de Menezes;

  • 作者单位

    Departamento de Quimica, Centra de Ciencias Exatas, Universidade Federal do Espirito Santo, UFES, Avenida Fernando Ferrari 514, Goiabeiras, 29075-910-Vitoria, ES, Brazil;

    Departamento de Quimica, Centra de Ciencias Exatas, Universidade Federal do Espirito Santo, UFES, Avenida Fernando Ferrari 514, Goiabeiras, 29075-910-Vitoria, ES, Brazil;

    Departamento de Quimica, Centra de Ciencias Exatas, Universidade Federal do Espirito Santo, UFES, Avenida Fernando Ferrari 514, Goiabeiras, 29075-910-Vitoria, ES, Brazil;

    Departamento de Quimica, Centra de Ciencias Exatas, Universidade Federal do Espirito Santo, UFES, Avenida Fernando Ferrari 514, Goiabeiras, 29075-910-Vitoria, ES, Brazil;

    Petrobras/Cenpes/QM, Ilha do Fundao, 21941-598 Rio de Janeiro, RJ, Brazil;

  • 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
  • 关键词

    Asphaltene aggregation; ~1H NMR and DOSY;

    机译：沥青质聚集;〜1H NMR和DOSY;

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