二氧化碳重整
催化作用
甲烷
纳米颗粒
烧结
材料科学
碳纤维
拉曼光谱
化学工程
核化学
无机化学
合成气
化学
纳米技术
冶金
复合数
有机化学
复合材料
工程类
物理
光学
作者
André L.A. Marinho,Raimundo C. Rabelo‐Neto,Florence Epron,Nicolas Bion,Fabio Souza Toniolo,Fábio B. Noronha
标识
DOI:10.1016/j.apcatb.2019.118387
摘要
Ni nanoparticles embedded in CeO2 ([email protected]2) and CeZrO2 ([email protected]2) were synthesized by sol-gel method and compared with a Ni/CeO2 prepared by support impregnation. The performance of the catalysts was investigated for dry reforming of methane reaction. In situ XRD, XANES and TEM showed that Ni embedded in CeO2 improved the resistance to sintering along the reduction at 800 °C. Doping ceria with zirconia inhibited the growth of Ni particles and increased the oxygen mobility. SEM, TEM, Raman spectroscopy and TGA of the used catalysts after dry reforming of methane showed that carbon formation rate was significantly reduced for the catalysts containing Ni nanoparticles embedded in ceria structure. Carbon deposits were not detected over [email protected]2 after 24 h of reaction. Therefore, the control of Ni particle size and the high oxygen mobility of [email protected]2 catalyst inhibited carbon deposition and favored the mechanism of carbon removal, promoting catalyst stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI