| 摘要 |
A composition comprising a coprecipitated magnesia-lanthana-alumina (MgO-La2O3-Al2O3) wherein the MgO component is present as microcrystalline phase, having a BET (N2) surface area of at least 130 m2/g, preferably combined with a catalytic oxidation and/or reducing promoter metal such as ceria, vanadia and/or titania.
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