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Yang Z.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2012

To investigate the effect of polarity of organic liquids and the dispersion state of CO 2 in organic liquids on the volume expansion of CO 2 + organic liquid systems, the solubility of CO 2 in methylbenzene and ethanol and the volume of CO 2 + methylbenzene and ethanol at different temperatures and pressures were measured with a PVT apparatus. The results imply that the microscopic dispersion state of CO 2 molecules in organic liquids under near-critical or supercritical conditions play a dominant role for increasing the volume of the CO 2 + organic liquid systems. The microscopic dispersion state and the solubility of CO 2 in the organic liquids and the volume expansion of the CO 2 + organic liquid systems are affected by the polarity and the structure of the organic liquid molecule obviously. When pressure and temperature are fixed, the intermolecular force between CO 2 molecule and the organic liquids and the intermolecular force operating within the organic liquids play a dominate role in the volume expansion of the CO 2 + organic liquid systems. © 2012 American Chemical Society. Source


Yang Z.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2012

To investigate the effect of alkane molecular structure on the volume expansion of CO 2 + alkane systems, the solubility of CO 2 in hexane, octane, decane, and cyclohexane and the volume of CO 2 + alkanes at different temperature and pressure was measured with a PVT apparatus. The results imply that the dispersion state of CO 2 molecules in the alkane phase under near critical or supercritical condition of CO 2 plays a dominate role in increasing the volume of CO 2 + alkane systems. The solubility of CO 2 in the alkanes, the volume expansion of the CO 2 + alkane systems, and the London force operating within alkane molecules are strongly influenced by molecular structure of the alkanes and pressure. © 2012 American Chemical Society. Source


Zhao D.,China University of Petroleum - Beijing | Li M.,China University of Petroleum - Beijing | Li M.,State Key Laboratory of Heavy Oil Processing | Peng B.,China University of Petroleum - Beijing | And 2 more authors.
Journal of Dispersion Science and Technology | Year: 2013

To study the effect of Tween 60 on dispersion property of water-soluble phenol-formaldehyde resin (PFR), the size and zeta potential of PFR/Tween 60 molecule aggregates and the surface tension, turbidity and blocking property of PFR/Tween 60 dispersion were measured. The results of the study show that when Tween 60 concentration in the PFR/Tween 60 solutions is lower than CMC, the dispersion property of PFR solution is not affected by Tween 60 significantly. When Tween 60 concentration in the PFR/Tween 60 solutions is higher than CMC, the Tween 60 molecules, and PFR molecules form complex molecule aggregates in water which affected the dispersion property of PFR solution significantly. The interaction between Tween 60 molecule and PFR molecule in the complex molecule aggregates is stronger than the interaction between PFR molecules in the PFR molecule aggregates. © 2013 Copyright Taylor and Francis Group, LLC. Source


Wang Z.,Wuhan Institute of Technology | Du Y.,Wuhan Institute of Technology | Xiang L.,State Key Laboratory of Heavy Oil Processing | Cheng J.,Wuhan Institute of Technology
Petroleum Processing and Petrochemicals | Year: 2010

Crumb rubber and SBS were used to modify asphalt(SK AH-70)by high shearing technology. In this paper), the effects of the mass ratio of base asphalt in pre-blending mixture, the amount of aromatics oil and stabilizing agent on the performance of modified asphalt were investigated through orthogonal experiment design to obtain the optimal preparation conditions. Under the optimal conditions of a mass ratio of asphalt in pre-blending mixture of 3, an aromatics oil added amount of 4% and a stabilizing agent added amount of 3%, the obtained modified asphalt having a softening point of 61.0 °C, a 5 °C ductility of 30.0 cm and an elastic recovery of 85%. Compared with SBS modified asphalt and crumb rubber modified asphalt, the performance of crumb rubber/SBS modified asphalt was better than the latter and a bit lower than the former, yet it could still meet the requirements of SBS modified asphalt, besides, it had the advantages of low cost and easy for construction, which indicated that it should have a promising future. Source


Yang Y.,Tsinghua University | Zhang J.,Tsinghua University | Wang S.,Tsinghua University | Xu X.,Tsinghua University | And 4 more authors.
Nanoscale | Year: 2015

A simple strategy toward versatile encapsulations of inorganic nanocrystals, through a green hydrothermal treatment of commercial polyurethane sponge, was developed. This approach enables us to realize a general method to form a surface-adherent, N-doped coating with a controllable thickness for well-defined structures. These composites exhibit active properties in optical applications and energy storage. For example, N-doped carbon encapsulated Fe2O3 nanoboxes show a very high discharge capacity and outstanding cyclability, and the capacity still remained at 1086 mA h g-1 at a current density of 400 mA g-1 after 200 cycles. Our results described here provide a simple surface coating technique to design various functional nanostructures. © 2015 The Royal Society of Chemistry. Source

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