Some aspects on the losses of metal from the support in the hydrocarbonylation of methanol

• Published in: Journal of molecular catalysis. A, Chemical Vol. 144; no. 2; pp. 307 - 314
• Main Authors: Halttunen, M.E, Niemelä, M.K, Krause, A.O.I, Vuori, A.I
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 05.07.1999; Elsevier
• Subjects: Catalysis; Catalyst stability; Chemistry; Exact sciences and technology; General and physical chemistry; Methanol hydrocarbonylation; Rhodium/activated carbon; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Methanol hydrocarbonylation; Catalyst stability; Rhodium/activated carbon; Catalytic reaction; Hydrogen; Chemical stability; Transition metal; Experimental study; Carbon; Supported catalyst; Heterogeneous catalysis; Impregnation; Carbonylation; Rhodium; Environmental effect; Platinoid; Methanol
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/S1381-1169(98)00384-7

The stability of the Rh/C catalysts during hydrocarbonylation of methanol was studied by subjecting the catalysts to the individual reactants as well as their combinations in vapour phase (250°C and 1 bar) and in liquid phase (220°C, 120 bar). Neither methanol and methyl iodide, nor hydrogen or carbon monoxide alone effectuated metal leaching, but hydrogen did induce agglomeration of metallic species. In the vapour phase reaction, 20–30% of the metal was lost at 1 bar, and 50% at 15 bar, and in liquid phase the losses were 20–70% at 120 bar, i.e., the losses increased with increasing reaction pressure. Nevertheless, the activated carbon support affected product selectivity in the vapour phase conditions at 1 bar.