用于乙烷化学循环氧化脱氢的卤化物离子掺杂 SrMnO3

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2023-12-18 DOI:10.1002/ghg.2254
Zifan Xing, Haitao Chen, Min Mao, Xiaocen Liang, Da Song, Yang Li, Tao Long, Xiaoli Chen, Fang He
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引用次数: 0

摘要

乙烷的化学循环氧化脱氢(CL-ODH)是将乙烷转化为高附加值产品乙烯的一种高效方法。这项研究的重点是通过溶胶-凝胶法合成 SrMnO3 及其掺杂卤化物离子的衍生物(SrMnO3Cl 和 SrMnO3Br)。研究探讨了这些过氧化物在乙烷的 CL-ODH 中用作氧载体的性能。结果表明,将半径较大的卤化物离子(Cl- 和 Br-)掺入到 SrMnO3 包晶石的氧位点中会产生几种有利的结果。卤化物离子的掺入显著地促进了晶胞体积的扩大和晶格边缘间距的增强。此外,它还有助于提高氧空位浓度、增加 Mn4+/Mn3+ 摩尔比以及改善氧离子在体格内的流动性。固定床实验表明,这些掺杂了卤化物离子的氧化还原催化剂在循环测试中表现出卓越的活性和稳定性,在乙烷的 CL-ODH 反应中表现出更高的乙烯选择性和产率。总之,在 SrMnO3 中引入卤化物离子是提高 SrMnO3 氧载体在乙烷转化中 CL-ODH 性能的一种有前途的策略。© 2023 化学工业协会和 John Wiley & Sons, Ltd. 保留所有权利。
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Halide ions doped SrMnO3 for chemical looping oxidative dehydrogenation of ethane

The chemical looping oxidative dehydrogenation (CL-ODH) of ethane represents a highly effective approach for converting ethane into the value-added product ethylene. This investigation focused on the synthesis of SrMnO3 and its halide ions doped derivatives (SrMnO3Cl and SrMnO3Br) through the sol-gel method. The performance of these perovskites, employed as oxygen carriers in CL-ODH of ethane, was explored. The results unveiled several advantageous outcomes arising from the incorporation of halide ions (Cl and Br) with larger radius into the oxygen sites of the SrMnO3 perovskite. Halide ions doping notably induced cell volume expansion and enhanced lattice fringe spacing. Furthermore, it contributed to elevated oxygen vacancy concentration, increased Mn4+/Mn3+ molar ratio, and improved oxygen ions mobility within the bulk lattice. Fixed-bed experiments demonstrated that these redox catalysts, doped with halide ions, exhibited outstanding activity and stability during cycling tests, exhibiting enhanced both ethylene selectivity and yield in CL-ODH of ethane. In summary, the introduction of halide ions into SrMnO3 emerges as a promising strategy for enhancing the performance of CL-ODH in ethane conversion for SrMnO3 based oxygen carriers. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.

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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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