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A temperature-programmed oxidation method for quantitative characterization of the thermal cokes morphology

机译：一种程序升温氧化法，用于热焦炭形态的定量表征

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摘要

A series of thermal cokes obtained by coking of vacuum residues and fractions have been studied by polarized light microscopy observation, scanning electron microscope (SEM), and temperature-programmed oxidation (TPO) technique. The anisotropic degrees of coke samples are found to be considerably different for discriminating characterization, which indicates that the coke morphology is closely dependent on the chemical nature of the coking materials. The restricted mesophase development in thermal coke might be ascribed to the increasing amount of heteroatoms contained in the parent coking materials. A proper signal analysis procedure of TPO profiles was obtained to discriminate the carbon species in the coke quantitatively, and then a good one-to-one correlation between determinations by polarized-light micrographs analysis and TPO method was observed, which shows that the TPO technique could be a suitable and more rapid method than polarized-light microscopy to quantitatively assess the morphology of coke, even in some situations in which the traditional method is inadequate.
机译：通过偏光显微镜观察，扫描电子显微镜（SEM）和程序升温氧化（TPO）技术研究了通过真空残留物和馏分的焦化获得的一系列热焦炭。发现焦炭样品的各向异性程度在区分特征方面有很大不同，这表明焦炭形态与焦化材料的化学性质密切相关。热焦中中间相受限制的发展可能归因于母体焦化材料中所含杂原子的增加。获得了正确的TPO曲线信号分析程序以定量区分焦炭中的碳种类，然后观察到偏光显微照片分析和TPO方法之间的良好一对一相关性，这表明TPO技术相对于偏光显微镜，定量分析焦炭的形态可能是一种合适且更快速的方法，即使在传统方法不足的情况下也是如此。

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  • 来源
    《Fuel》 |2013年第11期|274-279|共6页
  • 作者

    Kun Chen; Zhenxi Xue; He Liu; Aijun Guo; Zongxian Wang;

  • 作者单位

    State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, China;

    State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, China;

    State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, China;

    State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, China;

    State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao Economic Development Zone, Qingdao, Shandong 266580, China;

  • 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

    Temperature-programmed oxidation; technique; Coke morphology; Polarized light microscopy; Scanning electron microscopy;

    机译：程序升温氧化;技术;焦炭形态偏光显微镜;扫描电子显微镜;

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