Structural Requirements for Chemoselective Ammonolysis of Ethylene Glycol to Ethanolamine over Supported Cobalt Catalysts
| Autor: | Zhaoxia Zhang, Haoshang Wang, Shuai Wang, Guoding Gu, Xianchi Lei, Yafei Hu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
ethanolamine
chemistry.chemical_element Nanoparticle ethylene glycol TP1-1185 010402 general chemistry 01 natural sciences Catalysis co-based catalyst chemistry.chemical_compound Adsorption Ethanolamine Dehydrogenation Physical and Theoretical Chemistry QD1-999 Ag-doping 010405 organic chemistry Chemical technology alcohol ammonolysis 0104 chemical sciences Chemistry chemistry Selectivity size effect of metal particles Cobalt Ethylene glycol Nuclear chemistry |
| Zdroj: | Catalysts, Vol 11, Iss 736, p 736 (2021) Catalysts Volume 11 Issue 6 |
| ISSN: | 2073-4344 |
| Popis: | Ethylene glycol is regarded as a promising C2 platform molecule due to the fast development of its production from sustainable biomass. This study inquired the structural requirements of Co-based catalysts for the liquid-phase ammonolysis of ethylene glycol to value-added ethanolamine. We showed that the rate and selectivity of ethylene glycol ammonolysis on γ-Al2O3-supported Co catalysts were strongly affected by the metal particle size within the range of 2–10 nm, among which Co nanoparticles of ~4 nm exhibited both the highest ethanolamine selectivity and the highest ammonolysis rate based on the total Co content. Doping of a moderate amount of Ag further promoted the catalytic activity without affecting the selectivity. Combined kinetic and infrared spectroscopic assessments unveiled that the addition of Ag significantly destabilized the adsorbed NH3 on the Co surface, which would otherwise be strongly bound to the active sites and inhibit the rate-determining dehydrogenation step of ethylene glycol. |
| Databáze: | OpenAIRE |
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