三氧化二铝含量对Ni／Zr0.4Ce0.6O2—Al2O3催化剂的CH4—CO2重整反应性能影响

采用水热合成法，制备了不同Al2O3含量的Ni/Zr0.4Ce0.6O2-Al2O3催化剂，采用X－射线衍射（XRD）和扩展X光吸收精细结构（EXAFS），对催化剂样品进行结构表征；考察了Al2O3的加入对催化剂结构和CH4－CO2重整反应活性的影响。结构表征和活性测试表明，催化剂中存在的主要晶相是Zr0.4Ce0.6O2.Al2O3的加入，使催化剂颗粒度变小，镍的分散度提高，并使反应活性有明显改进；而过量Al2O3的加入，却容易导致积炭。

CO-2 Reforming of CH-4 over Ni/Zr0.4Ce0.6 O2- Al2O3 Catalysts with Different Amounts of Al-2O-3 Prepared by Hydrothermal Method

Ni/Zr 0.4 Ce 0.6 O 2\|Al 2O 3 catalysts with different amounts of Al\-2O\-3 were prepared by hydrothermal method and characterized by X\|ray diffraction and EXAFS techniques. The influence of the addition of Al\-2O\-3 on the structure of catalysts and activity of CO\-2 reforming of methane were studied. Characterization and activity test revealed that the main phase for composite oxide of Ce and Zr is Zr 0.4 Ce 0.6 O\-2, the addition of Al\-2O\-3 reduces the size of nickel particles, increases Ni dispersion and markedly improves the reaction activity. The addition of excessive Al\-2O\-3 causes easier carbon deposition.