Confining Ni nanoparticles in honeycomb-like silica for coking and sintering resistant partial oxidation of methane. (29th March 2018)

• Record Type: Journal Article
• Authors: Guo, Songsong; Wang, Junwen; Ding, Chuanmin; Duan, Qianlin; Ma, Qian; Zhang, Kan; Liu, Pin
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 13(2018)
• Page Start: 6603
• Page End: 6613
• Publication Date: 2018-03-29
• Subjects: Partial oxidation of methane -- Honeycomb-like silica -- Ni -- Coking and sintering resistance; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.02.035
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 3D honeycomb-like silica surrounded by ZrO2 layer (3HL-ZrO2 -SiO2 ) was prepared via sol-gel coating method. The average cell diameter of prepared material is about 10 nm. The highly dispersed Ni nanoparticles were immobilized to cell of honeycomb by impregnation method. The synthesized catalysts were characterized by SEM, TEM, XRD, H2 -TPR/TPD, TGA and N2 adsorption-desorption techniques. Contributed by confinement of honeycomb-like silica, the Ni/3HL-ZrO2 -SiO2 catalyst showed superior anti-sintering and coking ability compared with conventional catalysts. Further, improving the oxygen storage capacity from ZrO2 and highly dispersed active-sites afford excellent catalytic activity. CH4 conversion up to 90%–92% was obtained. The blocking effect of honeycomb cell endowed outstanding sintering resistance referring to Ni based catalysts. Graphical abstract: The Ni nanoparticles were confined within the cell of 3D honeycomb-like silica to inhibit sintering and coking to improve stability of Ni based catalysts for partial oxidation of methane reaction. Highlights: The 3D honeycomb-like silica modified by ZrO2 was prepared. The highly dispersed Ni nanoparticles were immobilized to cell of honeycomb. The confinement improved anti-sintering and coking ability of Ni catalyst. The addition of ZrO2 contributed to eliminating carbon deposition.