The
selective conversion of furfural (FUR) with ethanol to produce
furan-2-acrolein has been successfully performed in the presence of
O2, in which metal organic framework (MOF) supported platinum
nanoparticles (Pt@MOF-5, Pt@UIO-66, and Pt@UIO-66-NH2)
were used as the catalysts. Under the optimal conditions, 84.1% conversion
of FUR and 90.1% selectivity of furan-2-acrolein was obtained with
Pt@MOF-5 as the catalyst. Moreover, the catalysts were characterized
by XRD, H2-TPR, HRTEM, HRSEM, and XPS techniques, with
the synergetic effect of well-dispersed platinum nanoparticles in
the MOF-5 channel. In addition, the results of the recycling experiment
exhibited that there was no significant loss after the catalyst was
reused 5 times.
The oxidative condensation of furfural
with aliphatic alcohols
catalyzed by the supported Co
x
O
y
–N catalysts is developed in the presence
of molecular oxygen. For the oxidative condensation process of furfural, n-propanol and dioxygen, a 75.1% conversion of furfural
and 92.8% selectivity of 3-(furan-2-yl-)-2-methylacryaldehyde was
obtained when the Co
x
O
y
–N@K-10 and cesium carbonate was employed as catalytic
system. Moreover, the reaction conditions were optimized and the oxidative
condensation of furfural with different aliphatic alcohols was also
investigated. The synergistic effect between the Co
x
O
y
–N@K-10 and basic additive
was considered to be responsible for this cascade process. Furthermore,
a possible reaction mechanism is proposed for oxidative condensation
of furfural–n-propanol–O2 (FPO) system.
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