Catalysis Communications ( IF 3.4 ) Pub Date : 2020-11-11 , DOI: 10.1016/j.catcom.2020.106237 M.A. Vasiliades , C.M. Damaskinos , P. Djinović , A. Pintar , A.M. Efstathiou
The effects of cobalt in the CeZrO2-supported NiCo (3 wt%, Co/ :Ni=3/2) on the DRM at 750oC were investigated by the transient method and use of 18O2 and 13CO2. Transient kinetic rates of carbon deposition and gasification by the support’s oxygen, TOF (s-1) and concentration of active carbon were determined. Higher TOF and reduced carbon accumulation rates were measured on NiCo than Ni at the initial stage of reaction. However, oxidation of Co with time-on-stream led to lower and higher concentration of active metal sites and deposited carbon, respectively. These results appear important for catalyst design improvements (e.g. metal alloy composition).
中文翻译:
NiCo / Ce 0.75 Zr 0.25 O2 -δ上的CH 4干重整:Co对位点活性和碳途径的影响通过瞬态技术研究
钴在CeZrO效果2 -支持镍钴(3重量%以下,Co /:镍= 3/2)上,在750的DRM Ó C下通过瞬时方法和用途的研究18 ö 2和13 CO 2。确定了由载体的氧气,TOF(s -1)和活性炭浓度引起的碳沉积和气化的瞬态动力学速率。在反应的初始阶段,与Ni相比,在NiCo上测得的TOF更高且碳积累速率降低。然而,随着时间的流逝氧化钴分别导致活性金属位点和沉积碳的浓度降低和升高。这些结果对于改进催化剂设计(例如金属合金成分)显得很重要。