LIU Yi, LIU Yong, CHEN Jianfeng, et al. Effects of MnOx supports on light olefin synthesis using cobalt catalyst in Fischer-Tropsch reaction[J]. CIESC Journal, 2015, (9): 3413-3420. DOI: 10.11949/j.issn.0438-1157.20150867.
LIU Yi, LIU Yong, CHEN Jianfeng, et al. Effects of MnOx supports on light olefin synthesis using cobalt catalyst in Fischer-Tropsch reaction[J]. CIESC Journal, 2015, (9): 3413-3420. DOI: 10.11949/j.issn.0438-1157.20150867.DOI:
A series of Co/MnOx catalysts were prepared by impregnation method to investigate the effects of MnOx supports on selectivity of light olefins (C2=-C4=). The various catalysts were characterized by XRD
SEM
TEM
TPR and DRIFTS. The TPR results showed that the Co/MnO and Co/Mn3O4 were more easy to be reduced. The DRIFTS results indicated that Co/MnO and Co/Mn3O4 had much more adsorbed CO
which improved high CO conversion. The more bridge-adsorbed CO on Co/Mn2O3 and Co/Mn3O4 catalysts would contribute to forming more CH2 species. The FTS results revealed that Co/MnO and Co/Mn3O4 had better activity
and Co/Mn2O3 and Co/Mn3O4 realized better selectivity of C2=-C4=. The Co/Mn3O4 reached the 50.91% selectivity of C2=-C4= and olefin to paraffin ratio (O/P) of 3.40 within C2-C4.