Facile synthesis of Ni/SiO2 catalyst by sequential hydrogen/air treatment: A superior anti-coking catalyst for dry reforming of methane. (September 2016)

• Record Type: Journal Article
• Authors: Gao, X.Y.; Hidajat, K.; Kawi, S.
• Is Part Of: Journal of CO₂ utilization. Volume 15(2016)
• Page Start: 146
• Page End: 153
• Publication Date: 2016-09
• Subjects: Ni -- SiO2 -- Calcination -- Hydrogen -- Dry reforming of methane; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2016.05.007
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Abstract: A novel sequential treatment method (hydrogen treatment prior to air calcination) was used to prepare Ni/SiO2 catalysts by incipient wetness impregnation (IWI). This catalyst showed a uniform and small Ni particle size (d = 2.5 ± 0.8 nm) and a strong metal-support interaction (TR ≈ 670 °C), yielding an excellent catalytic performance (85% for CO2 conversion and 80% for CH4 conversion) with negligible metal sintering and no carbon deposition over 100-h dry reforming of methane (DRM) reaction. The first-step hydrogen treatment removed the oxygen radicals produced from the decomposition of Ni nitrate and the second-step air calcination stabilized Ni nanoparticles by forming Ni (phyllo)silicate structure. Therefore, the sequential calcination method produced small, uniform and highly dispersed Ni nanoparticles, strong metal-support interaction and excellent catalytic performances for DRM reaction.