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- W2017178788 abstract "Abstract A Ni/Mg(Al)O catalyst was obtained from a composite NiMgAl lamellar double hydroxide precursor. This material was tested in the gas-phase hydrogenation of acetonitrile between 353 and 423 K, after calcination and reduction at various temperatures. The highest selectivity to monoethylamine, 94.6% at 47% reactant conversion, was reached after calcination at 623 K and reduction at 723 K. FTIR spectroscopies of adsorbed CD 3 CN and CO were carried out on the reduced sample. The adsorption of CD 3 CN provided evidences that the acidity of Ni/Mg(Al)O was the lowest after calcination at 623 K and reduction at 723 K. Depending on the activation treatment, the ν CO of (Ni) x CO, at low CO coverage, took different values reflecting some modifications of the Ni d -band. The increased selectivity in monoethylamine in the hydrogenation of acetonitrile on Ni/Mg(Al)O was correlated with the decrease of acidity of the sample, and not with a modification of the electronic properties of Ni. The decrease of the acidity of the support lowered the acid-catalysed transamination reaction leading to secondary and tertiary amines." @default.
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- W2017178788 date "1998-04-01" @default.
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- W2017178788 title "Influence of the thermal treatments of a (Ni+Mg)/Al layered double hydroxide in the hydrogenation of acetonitrile" @default.
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- W2017178788 doi "https://doi.org/10.1016/s0926-860x(98)00006-4" @default.
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