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Duan Y.,Tsinghua University | Ding R.,Tianjin University | Shi Y.,Tsinghua University | Fang X.,Tsinghua University | And 4 more authors.
Catalysts | Year: 2017

Recently, the catalytic upgrading of bio-oil to renewable diesel has been attracting more and more attention. In the current paper, carbon nanotube (CNT)-supported nickel catalysts, namely, 5% Ni/CNTs, were prepared for liquid hydrocarbon production through the deoxygenation of palmitic acid, the model compound of bio-oil under a mild condition of 240°C reaction temperature and 2 MPa H2 pressure. The experimental results revealed that the main reaction product was pentadecane (yield of 89.64%) at an optimum palmitic acid conversion of 97.25% via the hydrodecarbonylation (HDC) process. The deoxygenation mechanism for palmitic acid conversion was also investigated. This study provides technical parameters and a theoretical basis for further industrialization in the bio-oil upgrading process. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

Guo T.,Beijing Key Laboratory of Fine Ceramics | Guo T.,Tsinghua University | Wang C.,Beijing Key Laboratory of Fine Ceramics | Wang C.,Tsinghua University | And 6 more authors.
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2013

The absorption sphere shutdown system is the second shutdown system of 10 MW HTR. The absorption sphere contains 25% B4C, dispersing in graphite matrix. The crushing load, which is an important performance parameter of the absorption sphere, closely relates to the diameter. The effect of graphite sphere diameter and density on the crushing load was studied using the graphite sphere to simulate HTR absorption spheres. Three kinds of graphites with different densities were chosen and processed into five types of spheres with different diameters, and then the crushing experiment was conducted. The results show that the crushing load of the sphere is proportional to the square of the diameter, and increases with the density. For a certain diameter of graphite sphere, increasing the density of the sphere is an effective way to enhance the crushing load.

Wang L.,Tsinghua University | He X.,Tsinghua University | He X.,State Key Laboratory of Automotive Safety and Energy | Li J.,Tsinghua University | And 5 more authors.
Angewandte Chemie - International Edition | Year: 2012

More than LiP service: The adsorption of red phosphorus into porous carbon provides a composite anode material for lithium-ion batteries. The amorphous nano phosphorus, in the carbon matrix, shows highly reversible lithium storage with high coulombic efficiencies and stable cycling capacity of 750 mAh per gram composite (see picture). Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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