Modification of Fe on Co/diatomite catalyst for selective hydrogenation of cinnamaldehyde

The modification function of iron on Co/diatomite catalyst for selective hydrongenation of cinnamaldehyde(UAL) to cinnamyl alcohol(UOL) was studied.Experimental investigation results showed that addition of small amount of Fe had influence on Co/diatomite,with remarkable influence on conversion of UAL and less influence on selectivity to UOL.When n(Fe)/n(Co)≤0.20(mol/mol),UAL conversion was increased from 60.69% to 80.63%,but UAL conversion declined with further increase in n(Fe)/n(Co).XRD,SEM and positron annihilation results indicated that Fe affects perfectness of Co3O4 crystals and leads to increasing crystal defects;Fe also improved dispersion of the catalyst on diatomite surface,with more obvious single layer dispersion and smaller crystal grain size of the catalyst on diatomite.