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本文通过A(A =Ca、Sr、Ba和La)调变和B(B =Fe、Co、Ni、Mn和Cu)的晶格取代作用 ,制备了一系列六铝酸盐复合金属氧化物催化剂ABAl11O19-δ,探索了该催化剂形成的影响因素 ,并考察了其对二氧化碳重整甲烷制合成气反应的催化性能 .初步实验结果表明 ,催化性能决定于六铝酸盐复合氧化物晶格中B的氧化还原性质 ,不同A调变对晶格中过渡金属活性组分B的性质有不同影响 .其中ANiAl11O19-δ都有较好催化活性 ,其它过渡金属B取代催化剂活性不及Ni取代催化剂 ,过渡金属活性顺序为Ni Co >Fe>Mn>Cu .
In this paper, a series of hexaaluminate composite metal oxide catalysts were prepared by the lattice substitution of A (A = Ca, Sr, Ba and La) and B (B = Fe, Co, Ni, Mn and Cu) ABAl11O19-δ, and explore the catalytic performance of the catalyst for carbon dioxide reforming of methane to syngas. The preliminary experimental results show that the catalytic performance determined in the hexaaluminate complex oxide lattice B , And different A modulations have different effects on the properties of the transition metal active component B in the crystal lattice, of which ANiAl11O19-δ has better catalytic activity, and the activity of other transition metal B substituted catalysts is less than that of the Ni-substituted catalyst. The transition metal The order of activity is Ni Co> Fe> Mn> Cu.