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Methane steam reforming with axial variable diameter particle structures in grille-sphere composite packed bed: A numerical study of hydrogen production performance

机译：格栅球复合填料床上轴向可变直径颗粒结构的甲烷蒸汽重整：氢气生产性能的数值研究

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摘要

Methane steam reforming with packed bed is an important approach to get hydrogen in industrial production. Compared with the conventional packed bed, the grille-sphere composite packed bed has the advantages of lowering the pressure drop, increasing the uniformity of the radial temperature distribution and improving overall efficiency. In the present paper, the axial variable diameter particle structure of grille-sphere composite packed bed has been proposed, and four different structures are studied to compare their performances. Moreover, two simulation methods are used in study: (a) the solid particle method which can show details of the simulation, (b) the equivalent medium method which can show the macro situation of simulation. Through these two methods, performances of four structures in different parameters are compared and analyzed. It is found that the axial variable diameter particle structures have better performance than the typical structures in different parameters cases. Inlet temperature, inlet velocity and inlet steam-carbon ratio are set to parameters respectively in simulation. According to the simulations, higher inlet temperature and inlet steam-carbon ratio will facilitate the reactions, however, higher inlet velocity will hinder the reactions. Through the solid particle method, the reasons of better performance have been found, and two methods difference are also studied. Compared with typical structures, the specific axial variable diameter structure brings 4.5% higher outlet hydrogen mass flow and 5.2% higher outlet hydrogen selectivity. Analysis of this study can guide the design of packed beds in industrial production and the results of this study have significance in industrial hydrogen production.
机译：用填充床甲烷蒸汽重整是在工业生产中获得氢的重要方法。与传统的填充床相比，格栅 - 球形复合填充床具有降低压降的优点，增加了径向温度分布的均匀性并提高了整体效率。在本文中，已经提出了格栅球形复合填充床的轴向可变直径粒子结构，研究了四种不同的结构以比较它们的性能。此外，在研究中使用了两种仿真方法：（a）可以显示仿真细节的固体颗粒方法，（b）可以显示模拟宏观情况的等效介质方法。通过这两种方法，比较和分析了不同参数中的四种结构的性能。发现轴向可变直径粒子结构具有比不同参数案例中的典型结构更好的性能。入口温度，入口速度和入口蒸汽 - 碳比分别设定为仿真中的参数。根据模拟，更高的入口温度和入口蒸汽 - 碳比将促进反应，然而，较高的入口速度会阻碍反应。通过固体颗粒方法，已经发现了更好的性能的原因，并且还研究了两种方法差异。与典型结构相比，特定的轴向可变直径结构具有4.5％的高出氢气质量流量和5.2％的氢气选择性。本研究的分析可以指导工业生产中的包装床设计，这项研究的结果对工业氢气产生具有重要意义。

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  • 来源
    《Energy Conversion & Management》 |2021年第7期|114163.1-114163.10|共10页
  • 作者

    Wu Zhihong; Wang Jingyu; Xie Bingjing; Yang Jian; Wang Qiuwang;

  • 作者单位

    Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn Xian 710049 Shaanxi Peoples R China;

    Xian Univ Sci & Technol Energy Sch Xian 710054 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Energy & Power Engn Key Lab Thermofluid Sci & Engn Xian 710049 Shaanxi 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

    Methane reforming; Numerical simulation; Grille-sphere composite packed bed; Axial variable diameter particle;

    机译：甲烷重整;数值模拟;格栅 - 球形复合包装床;轴向可变直径粒子;

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