Regeneration of bifunctional Fe/C catalyst for microwave-assisted methane pyrolysis by coke gasification with CO2

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-06-24 DOI:10.1016/j.cep.2025.110421

Stanisław Murgrabia, Robert Cherbański, Eugeniusz Molga, Andrzej Stankiewicz, Tomasz Kotkowski

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Abstract

Methane pyrolysis (MP) is an attractive method for producing H₂ without emitting CO₂. However, the widespread adoption of MP is hindered by catalyst coking, which leads to catalyst deactivation. To extend catalyst lifespan, periodic regeneration is required. Based on thermodynamic calculations, CO₂ was selected as the gasifying agent, as gasification with H₂O can lead to CO₂ emissions through a secondary water-gas shift reaction. The experiments were performed in a thermogravimetric analyser coupled with a micro GC. The chemical reaction was examined within a temperature range of 880–960 °C, and CO₂ partial pressures between 851 Pa and 4412 Pa. The volume reaction model was applied to model coke gasification. Based on statistical analysis of the results, a reaction order was found to be n = 1.04±0.102, which aligns with the value reported in the literature. The activation energy was determined to be approximately 183 kJ/mol.

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微波辅助甲烷热解焦炭- CO2气化双功能Fe/C催化剂的再生研究

甲烷热解（MP）是一种有吸引力的不排放二氧化碳的制氢方法。然而，催化剂结焦导致催化剂失活，阻碍了MP的广泛应用。为了延长催化剂的使用寿命，需要定期再生。根据热力学计算，选择CO2作为气化剂，因为H2O气化会通过二次水气转换反应产生CO2排放。实验在热重分析仪和微气相色谱联用中进行。化学反应的温度范围为880-960°C， CO2分压范围为851 - 4412 Pa。采用体积反应模型对焦炭气化过程进行了模拟。对结果进行统计分析，反应阶数为n = 1.04±0.102，与文献报道值一致。测定活化能约为183 kJ/mol。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.