Synthesis of aldehydes from synthesis gas over Na-promoted Mn-Ni catalysts

• Published in: Journal of catalysis 1991-04, Vol.128 (2), p.569-573
• Main Authors: Chuang, Steven S.C., Pien, Shyh Ing
• Format: Article
• Language: English
• Subjects: 01 COAL, LIGNITE, AND PEAT; 010408 - Coal, Lignite, & Peat- C1 Processes- (1987-); 10 SYNTHETIC FUELS; 100200 - Synthetic Fuels- Production- (1990-); ACETALDEHYDE; ADDITIVES; ALDEHYDES; ALKALI METALS; ALKENES; CARBON COMPOUNDS; CARBON MONOXIDE; CARBON OXIDES; Catalysis; CATALYTIC EFFECTS; Catalytic reactions; CHALCOGENIDES; CHEMICAL PREPARATION; CHEMICAL REACTIONS; CHEMISORPTION; Chemistry; COPRECIPITATION; ELECTRON SPECTROSCOPY; ELEMENTS; ETHYLENE; Exact sciences and technology; General and physical chemistry; HYDROCARBONS; HYDROGEN; HYDROGENATION; IMPREGNATION; MANGANESE; METALS; METHANATION; MINERALS; NICKEL; NONMETALS; ORGANIC COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PHOTOELECTRON SPECTROSCOPY; PRECIPITATION; SEPARATION PROCESSES; SILICA; SILICON COMPOUNDS; SILICON OXIDES; SODIUM; SORPTION; SPECTROSCOPY; SYNTHESIS; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; TRANSITION ELEMENTS; X-RAY SPECTROSCOPY
• ISSN: 0021-9517; 1090-2694
• DOI: 10.1016/0021-9517(91)90314-T

The synthesis of acetaldehyde and propionaldehyde from CO hydrogenation over NaMnNi catalysts has been studied. Coprecipitated NaMnNi catalysts exhibited high activities for the synthesis of acetaldehyde from CO hydrogenation and the synthesis' of propionaldehyde from addition of ethylene to CO hydrogenation. In contrast, NaMnNi/SiO 2 catalysts prepared from coimpregnation showed mainly methanation and ethylene hydrogenation activities. The selectivities to acetaldehyde in CO hydrogenation were found to parallel the selectivities to propionaldehyde in ethylene addition. X-ray photoelectron spectroscopic studies revealed that reduction of the coprecipitated NaMnNi catalyst at 350°C led to the migration of Na ions onto the surface of the catalyst resulting in the suppression of hydrogen chemisorption on the catalyst.