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首页> 外文期刊>Fuel >Rapid pyrolysis of brown coal in a drop-tube reactor with co-feeding of char as a promoter of in situ tar reforming
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Rapid pyrolysis of brown coal in a drop-tube reactor with co-feeding of char as a promoter of in situ tar reforming

机译：褐煤在滴管式反应器中快速热解，同时加入焦炭作为原位焦油重整的促进剂

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摘要

A Victorian brown coal (Loy Yang, LY) was co-fed with char prepared from the same coal in an atmospheric drop-tube reactor (DTR) at 900 and 950 ℃ in the presence of 50% steam to study in situ reforming of tar derived from rapid pyrolysis of brown coal over a char surface. Two different chars were prepared, including devolatilised LY at 800 ℃ under nitrogen flow (LYC, surface area 524 m~2/g) and LYC gasified with steam at 900 ℃ (GLYC, surface area 734 m~2/g). The concentrations of chars in the blended samples varied from 50% to 85% on a carbon basis. The yield of tar derived from LY (no char was blended) was 4.2 wt.% at 900 ℃ and particle residence time around 3-4 s. The yield decreased with increasing char concentration, and was 0.5 wt.% at a GLYC concentration of 85% at 900 ℃. Tar conversion over GLYC was more extensive than that over LYC and occurred more significantly at a higher temperature. Increasing the feeding rate of sample particles enhanced tar reforming, suggesting that solid hold-up was an important factor determining tar conversion characteristics. Liquid chromatography (LC) showed that the major components of heavy tar included typical polycyclic aromatic hydrocarbons (PAHs) ranging from three-membered rings (acenaphthylene) to seven-membered rings (coronene).
机译：将维多利亚州的褐煤（Loy Yang，LY）在相同的煤焦中，在大气滴管式反应器（DTR）中，在50％蒸汽存在下，于900和950℃联合进料，以研究焦油的原位重整源自焦炭表面上褐煤的快速热解。制备了两种不同的炭，包括在氮气流下于800℃脱挥发分的LY（LYC，表面积524 m〜2 / g）和在900℃用蒸汽气化LYC（GLYC，表面积734 m〜2 / g）。以碳为基准，混合样品中的焦炭浓度从50％到85％不等。 LY（未掺入焦炭）的焦油得率在900℃下为4.2 wt。％，颗粒停留时间为3-4 s。随着焦炭浓度的增加，收率降低，在900℃下，GLYC浓度为85％时，收率为0.5 wt。％。 GLYC上的焦油转化率比LYC上的焦油转化更广泛，并且在更高的温度下更明显地发生。增加样品颗粒的进料速度可提高焦油重整率，这表明固含量是决定焦油转化特性的重要因素。液相色谱法（LC）显示，重焦油的主要成分包括典型的多环芳烃（PAH），范围从三元环（ena）到七元环（并苯）。

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  • 来源
    《Fuel》 |2013年第10期|681-686|共6页
  • 作者

    Li-xin Zhang; Toru Matsuhara; Shinji Kudo; Jun-ichiro Hayashi; Koyo Norinaga;

  • 作者单位

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 8J6-8580, Japan;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 8J6-8580, Japan;

    Research and Education Center of Carbon Resources, Kyushu University, Kasuga 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 8J6-8580, Japan,Research and Education Center of Carbon Resources, Kyushu University, Kasuga 816-8580, Japan,Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 8J6-8580, Japan,Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga 816-8580, Japan;

  • 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

    Steam gasification; Tar decomposition; Rapid pyrolysis; Volatile char interaction; Coking;

    机译：蒸汽气化;焦油分解;快速热解;挥发性炭相互作用;焦化;

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