分布式甲醇重整制氢动力学及反应器强化研究

石油炼制与化工 ›› 2024, Vol. 55 ›› Issue (3): 67-74.

分布式甲醇重整制氢动力学及反应器强化研究

牛丛丛,栾学斌,徐润,夏国富

中石化石油化工科学研究院有限公司

收稿日期:2023-05-04 修回日期:2023-08-29 出版日期:2024-03-12 发布日期:2024-02-28
通讯作者: 徐润 E-mail:xurun.ripp@sinopec.com

STUDY ON KINETICS OF HYDROGEN PRODUCTION FROM DISTRIBUTED METHANOL REFORMING AND REACTOR INTENSIFICATION

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Received:2023-05-04 Revised:2023-08-29 Online:2024-03-12 Published:2024-02-28
Contact: 润徐 E-mail:xurun.ripp@sinopec.com

摘要/Abstract

摘要： 基于SR-DE机理和反应本征动力学数据得到了催化剂幂函数双速率动力学模型，通过内扩散影响判定，在考察的工艺条件范围内，甲醇裂解反应为动力学控制，而甲醇蒸汽重整反应为扩散控制；继而通过调控催化剂颗粒尺寸，强化了颗粒内传质，有效提高了催化剂表观活性；进一步采用COMSOL Multiphysics 6.1软件对甲醇重整制氢反应器单管进行多物理场仿真模拟，在相同的结构和工艺参数下，模拟对比了不同催化活性时的反应效果，确定了最佳工艺条件、催化剂活性与反应器结构的匹配性；在此基础上，优化了反应管结构尺寸，强化了传热过程，提高了供热效率，减小了床层温差，显著提高了催化剂利用效率和装置能效。

关键词: 甲醇重整, 催化剂, 内扩散, 反应器模拟, 过程强化

Abstract: A dual-rate kinetic model of power function type was obtained based on the SR-DE mechanism and the intrinsic kinetic data. It was revealed that the methanol cracking reaction was kinetic-control, while the methanol steam reforming reaction was diffusion-control within the process conditions studied according to the analysis of internal diffusion influences. Optimizing the pellet size could enhance the mass transfer within the pellets, thereby effectively improve the apparent activity of the catalyst. Multi-physical field simulations of a single-tube methanol reforming reactor were carried out by using COMSOL Multiphysics 6.1. To discuss the matching of process conditions, catalysts and reactor structure, the performances of the methanol-reforming reactor with different catalyst activities were simulated under the same structure and process conditions. Optimizing the reactor tube structure could enhance the heat transfer process, improve heating efficiency, reduce bed temperature difference, and significantly improve catalyst utilization efficiency and device energy efficiency.

Key words: methanol reforming, catalyst, internal diffusion, reactor simulation, process enhancement

牛丛丛栾学斌徐润夏国富. 分布式甲醇重整制氢动力学及反应器强化研究[J]. 石油炼制与化工, 2024, 55(3): 67-74.

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