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Effect of solvent and atmosphere on product distribution, hydrogen consumption and coal structural change during preheating stage in direct coal liquefaction

机译：煤直接液化预热阶段溶剂和气氛对产物分布，氢消耗和煤结构变化的影响

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摘要

In order to study the necessity of hydrogen source at preheating stage of direct coal liquefaction, product distribution, hydrogen consumption, and coal structural change of Hami sub-bituminous coal (HM) with 1-methylnaphthalene (1-MN) and tetralin respectively were investigated under hydrogen and nitrogen atmosphere. The results show that oil could be generated from coal itself with 1-MN under N-2 and the yield increases with temperature rising at the range of 200-350 degrees C, whereas only 4.94% oil is obtained at 350 degrees C. Moreover, volatiles and H/C ratios of pretreated coal decrease dramatically above 250 degrees C. At 350 degrees C, preheating with gas phase H-2 in 1-MN promotes oil yield to 10.42%. In the presence of tetralin, oil yields of 28.55% and 26.15% are achieved under N-2 and H-2 at 350 degrees C, respectively. Approximately same total hydrogen consumption is observed under N-2 and H-2 with tetralin, and the hydrogen consumption from tetralin is higher than that from H-2. With the addition of hydrogen sources, aromaticity of the residual solid decreases and reactivity increases. Decomposition of oxygen-containing functional groups like-COOH and C=O is not affected by the preheating solvent and atmosphere but relies on temperature. In addition, pretreated solid samples achieve increasing oil yield and conversion in the subsequent liquefaction with their rising thermal reactivity and H/C ratios.
机译：为了研究煤直接液化的预热阶段氢源的必要性，研究了哈密亚烟煤（HM）与1-甲基萘（1-MN）和四氢化萘的产物分布，氢消耗和煤结构变化。在氢气和氮气气氛下。结果表明，在N-2下1-MN可以从煤本身中产生石油，并且随着温度在200-350℃范围内升高，产量会增加，而在350℃下仅获得4.94％的石油。在250摄氏度以上时，预处理过的煤的挥发物和H / C比率显着降低。在350摄氏度时，在1-MN中用气相H-2进行预热可将油产率提高到10.42％。在四氢化萘的存在下，在N-2和H-2下在350摄氏度下，油的收率分别达到28.55％和26.15％。在N-2和H-2下，四氢萘的总氢消耗量大致相同，而四氢萘的氢消耗量高于H-2。随着氢源的加入，残余固体的芳族性降低并且反应性提高。含氧官能团（如-COOH和C = O）的分解不受预热溶剂和气氛的影响，而是取决于温度。此外，经过预处理的固体样品具有更高的热反应性和H / C比，可在随后的液化中提高石油产量和转化率。

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  • 来源
    《Fuel》 |2018年第1期|783-788|共6页
  • 作者

    Hao Pan; Bai Zongqing; Hou Ranran; Xu Junli; Bai Jin; Guo Zhenxing; Kong Lingxue; Li Wen;

  • 作者单位

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China;

    Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R 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

    Solvent type; Preheating atmosphere; Product distribution; Hydrogen consumption; Direct coal liquefaction;

    机译：溶剂类型;预热气氛;产品分布;耗氢量;直接煤液化;

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