ZHANG Shuai, ZHANG Yike, HU Rlckt, et al. Surface structure and activity of iron molybdate catalyst for methanol oxidation to formaldehyde[J]. CIESC Journal, 2016, (9): 3678-3683.
ZHANG Shuai, ZHANG Yike, HU Rlckt, et al. Surface structure and activity of iron molybdate catalyst for methanol oxidation to formaldehyde[J]. CIESC Journal, 2016, (9): 3678-3683.DOI: 10.11949/j.issn.0438-1157.20160132.
Iron-molybdenum catalysts with the same atomic ratio of Mo/Fe for methanol oxidation to formaldehyde were prepared by co-precipitation method under varied rates of stirring. The catalysts were characterized by SEM
XRD and Raman spectrum and the catalytic activity and selectivity evaluated in a fixed-bed reactor.It showed that with an increase of stirring speed
the specific surface area of the catalysts increases and the catalytic activity enhances. The yield of formaldehyde increases from 73.8% at 600 r·min-1 to 95.7% (T=280℃) at 10000 r·min-1. The catalyst consists of plate-like MoO3 and amorphous sponge-like Fe2(MoO4)3. In addition
the catalyst consists of sheet-shaped MoO3 and particle-shaped Fe2(MoO4)3
of which the former had barely no activity
and only the combination of the former and the latter (Fe2(MoO4)3) does show the catalytic activity.