posted on 2021-12-21, 15:36authored byTaolue Sun, Zhenyu Wu, Gang Wang, Zengxi Li, Chunshan Li, Erqiang Wang
A series
of Ni/γ-Al2O3 and Ni–Mo/γ-Al2O3 catalysts were prepared and evaluated for the
hydrogenation of methyl acrylate to methyl propionate in a fixed-bed
reactor. Physicochemical characterizations of these catalysts were
carried out with Brunauer–Emmett–Teller analysis, X-ray
diffraction, UV–vis diffuse reflectance spectroscopy, Raman
spectroscopy, hydrogen temperature programed reduction, X-ray photoelectron
spectroscopy, and transmission electron microscopy. It was noticed
that Mo loaded onto the Ni/γ-Al2O3 catalyst
could not only promote the dispersion of Ni particles but also weaken
the interaction between NiO and the γ-Al2O3 support. The effect of the calcination temperature on Ni–Mo/γ-Al2O3 catalysts is mainly due to the enhancement of
the interaction between Ni species and γ-Al2O3. The influence of the reduction temperature on the Ni–Mo/γ-Al2O3 catalysts, as well as the reaction conditions,
was also studied in detail. As a result, this hydrogenation process
could be efficiently promoted on the optimal 10Ni–10Mo/γ-Al2O3 catalyst with the highest yield of 94% and selectivity
of 99.9%, and no deactivation behavior was observed after 130 h time-on-stream
at 100 °C and 1.0 MPa.