Optimizing Methane Oxidative Coupling Over La<sub>2</sub>O<sub>3</sub>: Kinetic and Product Analysis

doi:10.20944/preprints202412.2379.v1

	Optimizing Methane Oxidative Coupling Over La₂O₃: Kinetic and Product Analysis
	Qiu, Zhehao; Cai, Yulu
	2024-12-27
状态	已发表
摘要	The Oxidative Coupling of Methane (OCM) is a promising process for converting methane directly into more valuable ethane and ethylene. In this work, high-time-resolution online mass spectrometry was employed to track the OCM reaction over a commercial La₂O₃ catalyst, focusing on the effects of methane to oxygen ratio, Gas Hourly Space Velocity (GHSV), and the presence of H₂O and CO in the feed gas on methane conversion and C₂ yield. The results demonstrated that an optimized GHSV (44640 to 93000 mLÂ·g^{â 1}Â·h^{â 1}) and methane to oxygen ratio (CH₄/O₂= 3) would achieve the highest methane conversion and C2 yield at 740 Â°C. Furthermore, the introduction of 1% H₂O into the reaction mixture resulted in a twofold increase in C₂ yield at 650 Â°C, while the addition of 1% CO led to a threefold increase in C2 yield at 550 Â°C. A model in which only the front-end catalyst is active was also developed to show excellent agreement with the experimental data. The relationship between catalytic performance and the effective catalyst position in the catalyst bed provides important insights into optimizing reactor design and operating conditions to maximize C₂ yield and selectivity in the OCM reaction.
关键词	oxidative coupling of methane online mass spectrometry effect of operating parameters kinetic study
语种	英语
DOI	10.20944/preprints202412.2379.v1
相关网址	查看原文
出处	Preprints
收录类别	PPRN.PPRN
WOS记录号	PPRN:120345388
WOS类目	Chemistry, Physical
资助项目	Analytical Instrumentation Center[SPST-AIC10112914]
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/493530
专题	物质科学与技术学院物质科学与技术学院_硕士生物质科学与技术学院_博士生
通讯作者	Qiu, Zhehao
作者单位	ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Zhehao,Cai, Yulu. Optimizing Methane Oxidative Coupling Over La₂O₃: Kinetic and Product Analysis. 2024.