催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (1): 149-154.DOI: 10.3724/SP.J.1088.2010.00726

• 研究论文 • 上一篇    下一篇

用于 CH4/CO2 重整反应 Ni/ZrO2-Al2O3 催化剂的结构和抗积炭性能

刘欣梅, 高晓, 李翔   

  1. 中国石油大学重质油国家重点实验室, 中国石油天然气集团公司催化重点实验室, 山东青岛 266555
  • 收稿日期:2010-07-28 修回日期:2010-10-09 出版日期:2011-01-13 发布日期:2014-05-22

Structure and Anti-carbon Capacity of ZrO2-Al2O3 Mixed Oxides in Ni-Based Catalyst for CH4/CO2 Reforming

LIU Xinmei*, GAO Xiao, LI Xiang   

  1. State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis of CNPC, China University of Petroleum, Qingdao 266555, Shandong, China
  • Received:2010-07-28 Revised:2010-10-09 Online:2011-01-13 Published:2014-05-22

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摘要： 在表面活性剂 P123 作用下, 通过无机盐的双水解反应制备了介孔 ZrO2-Al2O3 复合氧化物. 研究发现, 所得样品具有较大的比表面积和可调变的孔结构. ZrO2可嵌入到Al2O3 骨架中形成固溶体, 因而热稳定性增加; 与 Al2O3  相比, 适量ZrO2加入使ZrO2-Al2O3 的酸密度和酸强度增加. 在 CH4/CO2 干气重整反应中, Ni/ZrO2-Al2O3 催化剂活性略低于 Ni/Al2O3 , 但表现出优良的抗积炭性能. 这不仅与 Ni 分散度有关, 而且与因氧化物载体缺陷位和小晶粒而造成的电子效应密切相关.

关键词: 镍, 氧化锆, 氧化铝, 复合氧化物, 双水解, 介孔, 酸性, 抗积炭性能, 干气重整反应

Abstract: In the presence of P123 surfactant, mesoporous ZrO2-Al2O3 mixed oxides were prepared using inorganic salts as precursors by a bihydrolysis route. The results showed that the mixed oxides bear high surface area and controlling pore structure. Some solid solution can be formed througth the incorporation of zirconium to the alumina framework. The introduction of a proper amount of zirconia to alumina increased the acid sites number and acidic strength of the mixed oxides as compared with pure alumina.  Methane reforming with CO2 was used to detect the activity and stability of the Ni-based catalysts. The Ni/ZrO2-Al2O3 catalysts exhibit higher anti-carbon capacity than Ni/Al2O3, but possess slightly low activity. The improvement of anti-carbon capacity is ascribed to the dispersion of the active component and support effect induced by deficiencies and fine crystal size of the support.

Key words: nickel, zirconia, alumina, mixed oxide, double hydrolysis, mesopore, acidic property, anti-carbon capacity, methane reforming