Direct non-oxidative methane conversion in membrane reactor

Q1 Materials Science Catalysis Structure & Reactivity Pub Date : 2019-02-12 DOI:10.1039/9781788016971-00127

Su Cheun Oh, Mann Sakbodin, Dongxia Liu

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引用次数: 3

Abstract

Methane is an abundant fossil resource and the main constituent of natural gas and oil-associated gases. Innovation in methane conversion chemistry and technology is essential to provide value-added chemicals and fuels, which could be an alternative to petroleum. Direct non-oxidative methane conversion (DNMC) has been studied to produce C2 (e.g., acetylene, ethylene, ethane) and aromatics (e.g., benzene and naphthalene), when combined are referred to as C2+ hydrocarbons. However, thermodynamic constraint in DNMC leads to low methane conversion, low C2+ yield, and rapid catalyst deactivation by coke. Membrane reactors comprised of active DNMC catalysts and hydrogen-permeable membranes have the potential to alleviate the thermodynamic barriers and increase methane conversion. This chapter summarizes the past research and ongoing development on DNMC reaction in membrane reactors. The catalysts, membrane materials, reactor configurations and performance for DNMC in membrane reactors are discussed. The challenges, strategies to mitigate reactor deterioration during DNMC, as well as future research and development directions to advance this technology for one-step conversion of methane to C2+ hydrocarbon fuels and chemicals are presented.

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膜反应器中直接非氧化甲烷转化

甲烷是一种丰富的化石资源，是天然气和石油伴生气的主要成分。甲烷转化化学和技术的创新对于提供可替代石油的增值化学品和燃料至关重要。直接非氧化甲烷转化(DNMC)已被研究用于生产C2(如乙炔、乙烯、乙烷)和芳烃(如苯和萘)，当结合时称为C2+碳氢化合物。然而，DNMC的热力学约束导致甲烷转化率低、C2+产率低、催化剂被焦炭失活快。由活性DNMC催化剂和透氢膜组成的膜反应器具有缓解热力学障碍和提高甲烷转化率的潜力。本章总结了膜反应器中DNMC反应的研究现状和发展趋势。讨论了膜反应器中DNMC的催化剂、膜材料、反应器结构和性能。提出了DNMC过程中面临的挑战、缓解反应器恶化的策略，以及推进该技术一步转化为C2+碳氢燃料和化学品的未来研究和发展方向。

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