比较块状和介孔 Ni-Co-Ce/Al2O3 催化剂在甲烷干法转化中的结构特征和工艺活性

IF 5.6 2区工程技术 Q2 ENERGY & FUELS

Journal of The Energy Institute Pub Date : 2024-09-19 DOI:10.1016/j.joei.2024.101823

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引用次数: 0

摘要

甲烷干重整（DRM）是一种利用温室气体并产生氢气的潜在方法。催化剂失活是 DRM 商业化的最大障碍。最近，Ni-Co 双金属催化剂比 Ni 基催化剂具有更好的抗碳性。本研究的目的不仅在于研究镍钴催化剂对 DRM 活性的影响，还在于评估镍钴合金的生成对催化剂特性和活性的影响。在此过程中，介孔氧化铝（MA）被用作 Ni-Co 颗粒的催化剂载体，其结构和活性与块状氧化铝（BA）载体催化剂的结构和活性进行了比较。此外，所有开发的催化剂中都加入了铈，作为减少沉积焦炭量的合适促进剂。XRD 和氮吸附/解吸分析结果表明，与 Ni-Co/BA 样品相比，Ni-Co/MA 样品形成了介孔结构和纳米晶形态。结果表明，双金属 2Ni-1Co-1Ce/MA 样品的催化活性最好，700 ℃ 时的 CH4 转化率为 98.30%，CO2 转化率为 96.35%，H2 产率为 96.30%。

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Comparison between the structural characteristics and process activity of bulk and mesoporous Ni-Co-Ce/Al2O3 catalysts in the dry reforming of methane

Dry reforming of methane (DRM) is a potential way to exploit greenhouse gases and generate hydrogen. Catalyst deactivation is the biggest DRM commercialization obstacle. Lately, Ni-Co bimetallic catalysts have demonstrated improved carbon resistance over Ni-based catalysts. The aim of this research is not just to investigate the impact of Ni-Co catalysts on the DRM activity, but also to evaluate the Ni-Co alloy creation effect on the catalyst characteristics and activity. Mesoporous alumina (MA) was used as a catalyst support for Ni-Co particles in this process and its structure and activity were compared to those of bulk alumina (BA) supported catalysts. In addition, cerium was included into all of the catalysts developed as a suitable promoter for reducing the amount of deposited coke. The results obtained from the XRD and nitrogen adsorption/desorption analysis indicated the formation of a mesoporous structure and nanocrystalline morphology in the Ni-Co/MA samples, as compared to the Ni-Co/BA ones. The results showed that the bimetallic 2Ni-1Co-1Ce/MA sample had the best catalytic activity, with a CH₄ conversion of 98.30 %, CO₂ conversion of 96.35 %, and H₂ yield of 96.30 % at 700 °C.

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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.