Hydrogenolysis of methyl heptanoate over Co based catalysts: Mediation of support property on activity and product distribution

摘要: Abstract Co/MgO, Co/SiO2 and Co/Hβ catalysts were prepared by incipient wetness impregnation. The formation of MgO-CoO solid solution MgCo2O4 spinel in Co/MgO resulted high dispersions Co on MgO even at the low calcined temperatures loadings. second impregnation enhanced cations surface/subsurface catalysts, which led to enlarged metallic particle sizes H2 reduction. Comparatively, highly dispersion was only observed SiO2 Hβ loadings owing Coδ+ species strong interactions with these supports. solution/spinel strongly interacted induced reduced higher obtaining small sizes. These cases also significantly decreased basicities depending temperature loadings, increased acidic sites acidities, respectively. During hydrogenolysis processing, basic triggers splitting acyl C O bond methyl heptanoate form heptanal methanol, followed further hydrogenation 1-heptanol. While induce cracking ether heptanoic acid CH4. Heptanoic intermediate is then converted into C6 C7 alkanes parallel decarbonylation HDO pathways, activity product distribution could be facilely mediated synergistic catalysis metal acid/base. Under optimal conditions, maximal 1-heptanol summed C6/C7 yields 55% 89% over desire respectively, indicating promising applications vegetable oils.