Propanol Amination over Supported Nickel Catalysts: Reaction Mechanism and Role of the Support
Citations Over TimeTop 10% of 2019 papers
Abstract
Ni-supported hydroxyapatite catalyst (Ni/HAP) was characterized and evaluated for propanol amination to propylamine at 423 K. The reaction proceeds via dehydroamination, a process that involves sequential dehydrogenation, condensation, and hydrogenation. Kinetic and isotopic studies indicate that α-H abstraction from propoxide species limits the rate of the dehydrogenation step and hence the overall rate of reaction. The rate of propanol dehydrogenation depends on the composition of the support and on the concentration of Ni sites located at the interface between Ni nanoparticles and the support. Ni/HAP is an order of magnitude more active than Ni/SiO2 and displays a higher selectivity toward the primary amine. The superior performance of Ni/HAP is attributed to the high density of basic sites on HAP, which are responsible for stabilizing alkoxide intermediates and suppressing the disproportionation and secondary amination of amines.
Related Papers
- → Effects of alloying substitutions on the anti-disproportionation behavior of ZrCo alloy(2017)44 cited
- → Research Progress on the Anti-Disproportionation of the ZrCo Alloy by Element Substitution(2020)16 cited
- Study on disproportionation reaction of Fe_(1-x)O by DSC(2012)
- → Isomerization-disproportionation of m-xylene over dealuminated mordenites(1984)2 cited
- Disproportionation behaviour of LaNi_(5-x)M_x in hydriding process at High Temperature(2000)