21 research outputs found
Mitochondrial Adaptations to Variable Environments and Their Role in Animalsâ Stress Tolerance
Template CoMFA Generates Single 3D-QSAR Models that, for Twelve of Twelve Biological Targets, Predict All ChEMBL-Tabulated Affinities
A Copula-Based Method to Build Diffusion Models with Prescribed Marginal and Serial Dependence
A Non-Synonymous Coding Variant (L616F) in the TLR5 Gene Is Potentially Associated with Crohn's Disease and Influences Responses to Bacterial Flagellin
Misfolding-prone proteins are reversibly sequestered to an Hsp42-associated granule upon chronological aging
Nickel bioaccumulation and the antioxidant response in Pacific abalone Haliotis discus hannai, Ino 1953 exposed to waterborne nickel during thermal stress
RuO2-Ru/H beta zeolite catalyst for high-yield direct conversion of xylose to tetrahydrofurfuryl alcohol
Tetrahydrofurfuryl alcohol (THFOL), a valuable biomass-derived chemical, is an important precursor for producing linear diols and biodegradable solvents. Herein, we present the one-pot cascade conversion of xylose to THFOL over an H beta zeolite-supported RuO2-Ru (RuO2-Ru/H beta) catalyst. To elucidate the structure-property correlation of the RuO2-Ru/H beta catalyst and achieve a high THFOL yield via sequential isomerization, dehydration, and hydrogenation, several synthesis methods, namely incipient wetness impregnation, reductive deposition, activated reductive deposition, and post-oxidative activated reductive deposition (ARD-O) were used. The best catalytic performance was obtained over the RuO2-Ru/H beta-ARD-O catalyst. An almost complete conversion of xylose and a high THFOL yield of 61.8% were achieved after 1 h at 180 degrees C under an initial H-2 pressure of 3.0 MPa in tetrahydrofuran. In-depth analyses of the RuO2-Ru/H beta-ARD-O catalyst furfural (FFA)- and CO-probed diffuse reflectance infrared Fourier transform spectra indicated the formation of RuO2 at the corner and edge sites of Ru nanoparticles. The direct conversion of FFA to THFOL at interfacial RuO2-Ru sites without furfuryl alcohol (FOL) readsorption hindered the contact of FOL with the acidic support, which suppressed the formation of humin and other byproducts and led to a high THFOL yield