For a comprehensive understanding of the properties of 1,3-dimethyladamantane (1,3-DMA) as a new potential candidate of high energy-density hydrocarbon fuels, densities, viscosities, surface tensions, and refractive indices for binary mixtures of 1,3-DMA with each of four C10 alkanes, n-decane, butylcyclohexane, decalin, and exo-tetrahydrodicyclopentadiene (JP-10), are determined over the whole composition range at different temperatures ranging from (293.15 to 363.15) K and atmospheric pressure (0.1 MPa). The excess molar volume (VmE), the viscosity deviation (Δη), the surface tension deviation (Δγ), and the refractive index deviation (ΔnD) for these binary systems are calculated. All of the VmE values are negative over the whole composition range for these systems, and they show slight changes against the temperature. The Δη values for the systems except 1,3-DMA + JP-10 are negative, and the absolute values decrease obviously with rising temperature. The Δγ gives clearly negative values for the system of 1,3-DMA + n-decane and shows small values near zero for the other systems. Negligible values of ΔnD indicate that the refractive indices show nearly linear additions from those of two components for the binary mixtures. The results could provide important reference information for the development and performance of new high energy-density hydrocarbon fuels.
Jilei Xu,Lin Li,Guangyi Li,Aiqin Wang,Yu Cong,Xiaodong Wang,Ning Li
For the first time, proline-based ionic liquids were reported as effective catalysts for the aldol condensation of angelica lactone with furfural, two platform compounds which were obtained by the hydrolysis–dehydration reactions of cellulose and hemicellulose. Among the investigated catalysts, a renewable ionic liquid that was prepared with biomass-derived choline and l-proline (denoted as ChPro) demonstrated the highest activity. Over the ChPro catalyst, 86% carbon yield of C10 oxygenate was obtained under mild conditions (353 K, 1 h). After being hydrogenated over the Pd/C catalyst and hydrodeoxygenated under the promotion of the Pd–Cu/SiO2, the aldol condensation product of angelica lactone with furfural was transmuted into C8–C10 alkanes within the carbon chain range of jet fuel and diesel. Compared with the Cu/SiO2 and Pd/SiO2, the bimetallic Pd–Cu/SiO2 demonstrated higher activity and/or selectivity to C8–C10 alkanes for the hydrodeoxygenation of hydrogenated aldol condensation product. According to the characterizations of X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and CO Fourier transform infrared, the excellent catalytic performance of Pd–Cu/SiO2 can be comprehended by the Pd–Cu alloy particles formed during the preparation of this catalyst.
危险品化学品经营许可证（带存储）