化工进展2018，Vol.37Issue(1)：112-118,7.DOI:10.16085/j.issn.1000-6613.2017-0790
Ni/ZrO2催化剂的制备及甲烷分步水蒸气重整反应性能
Preparation of Ni/ZrO2catalyst and its performance in the reaction of stepwise steam reforming of methane
姜健准 1刘红梅 1张明森1
作者信息
- 1. 中国石油化工股份有限公司北京化工研究院,北京100013
- 折叠
摘要
Abstract
A series of Ni/ZrO2catalysts with different amount of nickel loadings were prepared via impregnation method using zirconium dioxide as the carrier,while zirconium dioxide was firstly obtained through precipitation from zirconium salts and calcination treatment. X-ray diffraction (XRD),nitrogen physical adsorption,hydrogen temperature programmed reduction (H2-TPR),and hydrogen temperature programmed desorption(H2-TPD)techniques were utilized to analyze the physical and chemical properties of the prepared catalysts. The possible status of the active nickel species were investigated and the diameters of nickel and nickel oxide aggregates were calculated. With the increase of the loading amount of nickel,both the BET area of the Ni/ZrO2catalysts and the dispersion degree of nickel decreased,while the diameter of the nickel aggregates and the portion of the desorption area in the H2-TPD curves increased. When the loading amount of nickel was around 10.2%,the diameter of the nickel aggregates and that of zirconia dioxide crystals were close to 30nm. The performance of Ni/ZrO2catalysts was further investigated based on the reaction of stepwise steam reforming of methane. The results indicated that the Ni/ZrO2catalysts could exhibit excellent performance only when the amount of nickel loading was in some range. Both insufficient and excess amount of nickel loadings would lower the catalytic conversion of methane. When the loading amount of nickel was around 10.2%,the catalyst showed the best performance in that the zirconium dioxide particles had similar size to that of the nickel species.关键词
Ni/ZrO2/甲烷/重整/表征Key words
Ni/ZrO2/methane/reforming/characterization分类
化学化工引用本文复制引用
姜健准,刘红梅,张明森..Ni/ZrO2催化剂的制备及甲烷分步水蒸气重整反应性能[J].化工进展,2018,37(1):112-118,7.
