催化剂颗粒形状对甲烷水蒸气重整反应的影响及工业反应器模拟

doi:10.11949/j.issn.0438-1157.20151252

化工学报 ›› 2016, Vol. 67 ›› Issue (2): 563-572.DOI: 10.11949/j.issn.0438-1157.20151252

• 催化、动力学与反应器 • 上一篇下一篇

催化剂颗粒形状对甲烷水蒸气重整反应的影响及工业反应器模拟

秦雯, 周志明, 程振民

华东理工大学化学工程联合国家重点实验室, 上海 200237

收稿日期:2015-08-03 修回日期:2015-11-06 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: 周志明
基金资助:
国家自然科学基金项目(21276076);教育部新世纪优秀人才支持计划项目(NCET-13-0801);中央高校基本科研业务费(222201313011)。

Influence of catalyst shape on methane steam reforming and simulation of industrial reactor

QIN Wen, ZHOU Zhiming, CHENG Zhenmin

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2015-08-03 Revised:2015-11-06 Online:2016-02-05 Published:2016-02-05
Supported by:
supported by the National Natural Science Foundation of China (21276076), the Program for New Century Excellent Talents in University (NCET-13-0801) and the Fundamental Research Funds for the Central Universities (222201313011).

摘要/Abstract

摘要：

甲烷水蒸气重整工艺是现阶段最主要的工业制氢技术,催化剂颗粒形状和反应器操作条件是影响重整反应器性能和产物组成的重要因素。首先从颗粒尺度研究催化剂形状对甲烷水蒸气重整反应的影响,在不同的反应温度和压力下,计算并比较了球形、柱形和环形催化剂的效率因子,其大小顺序为:柱形 < 球形 < 环形。其次,将反应器床层的质量、热量和动量传递与环形催化剂颗粒的扩散-反应方程相结合,建立了用于描述甲烷水蒸气重整工业反应器的一维轴向数学模型。计算并分析了反应器进口温度和压力对反应器床层的温度和压力分布、催化剂效率因子以及甲烷转化率和各组分浓度分布的影响,确定了适宜的工业反应器进口温度和压力,分别为773 K和3 MPa。

关键词: 甲烷水蒸气重整反应, 催化剂, 反应器, 扩散, 效率因子, 数学模拟

Abstract:

Methane steam reforming (MSR) is the most widely used technology for hydrogen production in industry now, where the shape of catalyst particles and the reactor operating conditions greatly influence the reactor performance and the product composition. Firstly, the present study investigated the effect of catalyst shape (sphere, cylinder and ring) on the MSR using a diffusion-reaction model on the particle scale. The effectiveness factors of shaped catalysts followed the sequence: cylinder < sphere < ring. Next, a one-dimensional mathematical model was developed by taking into account the mass, heat and momentum transfer on the reactor scale together with the diffusion-reaction equations on the catalyst scale, and used to describe an industrial MSR reactor. The effects of inlet temperature and pressure on the profiles of temperature and pressure inside the reactor, effectiveness factor, conversion of methane as well as concentration of various species were studied. Finally, the optimal inlet temperature and pressure for the industrial reactor were determined, being 773 K and 3 MPa, respectively.

Key words: methane steam reforming, catalyst, reactor, diffusion, effectiveness factor, mathematical modeling

中图分类号:

秦雯, 周志明, 程振民. 催化剂颗粒形状对甲烷水蒸气重整反应的影响及工业反应器模拟[J]. 化工学报, 2016, 67(2): 563-572.

QIN Wen, ZHOU Zhiming, CHENG Zhenmin. Influence of catalyst shape on methane steam reforming and simulation of industrial reactor[J]. CIESC Journal, 2016, 67(2): 563-572.

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催化剂颗粒形状对甲烷水蒸气重整反应的影响及工业反应器模拟

Influence of catalyst shape on methane steam reforming and simulation of industrial reactor

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