Stability of Co-Fe/diatomite catalysts for selective hydrogenation of cinnamaldehyde

Stability of Co-Fe/diatomite catalysts was investigated via selective hydrogenation of cinnamaldehyde in a high-pressure fixed bed micro-reactor for 24 h. The results indicated that there existed an induction period for Co-Fe/diatomite, after which cinnamaldehyde conversion of 70%, selectivity to cinnamyl alcohol of 80% and cinnamyl alcohol yield of 60% were attained; the catalysts exhibited good catalytic behaviors and stability. XRD, SEM, TG-DSC results showed that structure of the catalyst remained unchanged after reaction for 24 h, with smaller grain size; no coke formation was observed.