In
this study, we demonstrate that for the simultaneous hydrodeoxygenation
(HDO) of 1,4-anhydroerythritol a comparable yield of tetrahydrofuran
is obtained at half the previously reported H2 pressure.
The simultaneous hydrodeoxygenation was conducted using a heterogeneous
ReO
x
–Pd/CeO2 catalyst.
An L9 Taguchi design of experiment was enacted to elucidate the temperature,
pressure, and catalyst loading effects on the yield of the HDO reaction
by testing pressures ranging from 40 to 80 bar H2, temperatures
of 100–180 °C, and Re loadings of 2–4 wt %. Our
design showed that the yield of this reaction is significantly affected
by the reaction temperature only. An L9 Taguchi design was conducted
for xylitol simultaneous hydrodeoxygenation with pressures ranging
from 5 to 10 bar H2, temperatures of 140–180 °C,
and Re loadings of 2–4 wt %. The xylitol design elucidated
the direct relation of pressure, and the inverse relation of temperature
and catalyst loading, to yield with the optimal reaction condition
being 140 °C and 10 bar H2.
In this study, we demonstrate the production of long-chain hydrocarbons (C 8+ ) from 2-methylfuran (2MF) and butanal in a single step reactive process by utilizing a bi-functional catalyst with both acid and metallic sites. Our approach utilizes a solid acid for the hydroalkylation function and as a support as well as a transition metal as hydrodeoxygenation catalyst. A series of solid acids was screened, among which MCM-41 demonstrated the best combination of activity and stability. Platinum nanoparticles were then incorporated into the MCM-41. The Pt/MCM-41 catalyst showed 96% yield for C 8+ hydrocarbons and the catalytic performance was stable over four reaction cycles of 20 hour each. The reaction pathways for the production of long-chain hydrocarbons is probed with a combination of infrared spectroscopy and steady-state reaction experiments. It is proposed that 2MF and butanal go through hydroalkylation first on the acid site followed by hydrodeoxygenation to produce the hydrocarbon fuels.
We have studied P adsorption on Ni(111), a system which shows complex adsorbate structures. We determined the phase diagram of the surface P adsorbed on Ni(111). At low coverage, amorphous P was observed. At temperatures between 373 and 673 K and coverages above 0.1 monolayer, we found a ffiffi ffi 7
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.