Unveiling the enhanced role of Ni-La2O2CO3 for low-temperature dry reforming of methane

IF 5.6 2区工程技术 Q2 ENERGY & FUELS

Journal of The Energy Institute Pub Date : 2025-04-18 DOI:10.1016/j.joei.2025.102110

Huayu Qiu , Zhiliang Ou , Kang Hui Lim , Guoqiang Song , Claudia Li , Yuan Wang , Hangjia Zhang , Xin Huang , Jingyu Ran , Sibudjing Kawi

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引用次数: 0

Abstract

Lanthanum oxycarbonate (La₂O₂CO₃) is traditionally considered an intermediate in Ni-La₂O₃ catalyzed dry reforming of methane (DRM), but its direct application has been limited. This study investigates the catalytic properties of Ni-La₂O₃ (Ni-LO) and Ni-La₂O₂CO₃ (Ni-LOC) to understand their performance in low-temperature DRM (≤600 °C, LTDRM). Our study shows that under LTDRM conditions, Ni-LOC offers a larger specific surface area and increased electron cloud density around Ni, enhancing CH₄ activation. The absence of strong basic sites prevents carbon formation from the Boudouard reaction and stronger metal-support interaction enhances carbon resistances. Consequently, Ni-LOC exhibits CH₄ and CO₂ conversions of 30.8 % and 40.9 %, respectively, with lower carbon deposition than Ni-LO (4.92 % vs. 9.68 % weight loss). This study not only clarifies the mechanism of La₂O₂CO₃ in LTDRM but also offers insights into designing catalysts with improved resistance to coking.

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揭示了Ni-La2O2CO3在甲烷低温干重整中的增强作用

碳酸氧镧（La2O2CO3）传统上被认为是Ni-La2O3催化甲烷干重整（DRM）的中间体，但其直接应用受到限制。本研究考察了Ni-La2O3 （Ni-LO）和Ni-La2O2CO3 （Ni-LOC）的催化性能，了解它们在低温DRM（≤600°C， LTDRM）中的性能。我们的研究表明，在LTDRM条件下，Ni- loc提供了更大的比表面积，并增加了Ni周围的电子云密度，增强了CH4的活化。强碱性位的缺失阻碍了Boudouard反应中碳的形成，而更强的金属-载体相互作用增强了碳的抗性。因此，Ni-LOC的CH4和CO2转化率分别为30.8%和40.9%，碳沉积量低于Ni-LO （4.92% vs. 9.68%）。本研究不仅阐明了La2O2CO3在LTDRM中的作用机理，也为设计抗焦化催化剂提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The Energy Institute 工程技术-能源与燃料

CiteScore

10.60

自引率

5.30%

发文量

166

审稿时长

16 days

期刊介绍： The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include: Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies Emissions and environmental pollution control; safety and hazards; Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS; Petroleum engineering and fuel quality, including storage and transport Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems Energy storage The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.