METHOD FOR REDUCING CARBON DIOXIDE AT HIGH TEMPERATURES ON MIXED METAL OXIDE CATALYSTS IN THE FORM OF PARTIALLY SUBSTITUTED HEXAALUMINATES

摘要

A method for reducing carbon dioxide, comprising the step of reacting carbon dioxide and hydrogen in the presence of a catalyst in order to form carbon monoxide and water, is characterized in that the reaction is performed at a temperature greater than 700 °C and that the catalyst comprises a mixed metal oxide, which (I) is an oxide of the general formula LO_x(M_(y/z)Al_(2-y/z)O₃)_z and/or (II) comprises reaction products of (I) in the presence of carbon dioxide, hydrogen, carbon monoxide, and/or water at a temperature greater than 700 °C. The following applies: L is selected from the group: Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and/or Lu; M is selected from the group: Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, and/or Au; 1 x 2; 0 y 12; and 4 ≤ z ≤ 9. In some examples, the mixed metal oxide comprises BaNiAl₁₁O₁₉ or CaNiAl₁₁O₁₉.