METHOD FOR REDUCING CARBON DIOXIDE AT HIGH TEMPERATURES ON MIXED METAL OXIDE CATALYSTS COMPRISING NOBLE METAL

摘要

The invention relates to a method for reducing carbon dioxide, comprising the step of reacting carbon dioxide and hydrogen in the presence of a catalyst, whereby carbon monoxide and water is formed, characterised in that the reaction is carried out at a temperature of ≥ 700°C, and that the catalyst is a mixed metal oxide (I) comprising A _(1-w-x)A' _wA"_xB_(1-y-z)B'_yB"_zO₃- delta and/or reaction products (II) of (I) in the presence of carbon dioxide, hydrogen, carbon monoxide and/or water at a temperature of ≥ 700 °C, A, A' and A" being selected independently from each other from the group comprising: Mg, Ca, Sr, Ba, Li, Na, K, Rb, Cs, Sn, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Tl, Lu, Ni, Co, Pb and/or Cd. B is selected from the group comprising: Cr, Mn, Fe, Bi, Cd, Co, Cu, Ni, Sn, AI, Ga, Sc, Ti, V, Nb, Ta, Mo, Pb, Hf, Zr, Tb, W, Gd, Yb, Bi, Mg, Cd, Zn, Re, Ru, Rh, Pd, Os, Ir and/or Pt. B' is selected from the group comprising: Re, Ru, Rh, Pd, Os, Ir and/or Pt. B" is selected from the group comprising: Cr, Mn, Fe, Bi, Cd, Co, Cu, Ni, Sn, AI, Ga, Sc, Ti, V, Nb, Ta, Mo, Pb, Hf, Zr, Tb, W, Gd, Yb, Bi, Mg, Cd and/or Zn. 0 ≤ w ≤ 0,5; 0 ≤ x ≤ 0,5; 0 ≤ y ≤ 0,5; 0 ≤ z ≤ 0,5 and - 1 ≤ delta ≤ 1. In some examples, the mixed metal oxide comprises LaNi _0.9-0.99 Rh _0.01-0.1 O₃ or LaNi _0.9-0.99 Rh _0.01-0.1 O₃.