Combined steam and CO2 reforming of methane over one-pot prepared Ni/La-Si catalysts. (22nd February 2019)

• Record Type: Journal Article
• Authors: Chen, Chenju; Wang, Xueguang; Chen, Xiubin; Liang, Xiangcheng; Zou, Xiujing; Lu, Xionggang
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 10(2019)
• Page Start: 4780
• Page End: 4793
• Publication Date: 2019-02-22
• Subjects: Combined carbon dioxide and steam reforming of methane -- Ni catalysts -- La promoter -- Silica -- Synthesis gas; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.01.019
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The highly dispersed m Ni/ x La−Si catalysts with varied weight percentages of Ni and La were synthesized via one-pot sol-gel process and subsequently applied to combined carbon dioxide and steam reforming of methane (CSDRM) for syngas production. The addition of La improved the catalytic activity and stability as well as the coke resistance of the m Ni/ x La−Si catalysts. The effects of preparation routes, Ni contents and CO2 /steam (C/S) ratios on the performances of the Ni/LaSi catalysts were studied in detail for the CSDRM. The 17.5Ni/3.0LaSi catalyst synthesized with the assistance of poly (ethylene glycol) and ethylene glycol exhibited the most excellent catalytic activity, stability and coke resistance. In addition, the H2 /CO ratios in the product gas could be tuned by changing the C/S ratios in the feed. When the C/S ratio was 0.5, the H2 /CO ratio of about 2 was achieved for the 17.5Ni/3.0LaSi catalyst. Graphical abstract: Image 1 Highlights: Ni/ x La-Si catalyst possessed high activity and long-term stability for CSDRM. Ni/3.0LaSi catalyst showed a H2 /CO molar ratio of stoichiometric value of 2 for CSDRM. Addition of La significantly inhibited the carbon deposition on Ni/ x La-Si catalysts. Either PEG or EG was proved to be positive in improving the performance of Ni/ x La-Si catalysts. The H2 /CO molar ratio could be tuned with different CO2 /steam ratios in the feed.