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225 results on '"Zhang, Qing-Guo"'

15. Drawing Undirected Graphs with Genetic Algorithms

Author

Zhang, Qing-Guo, Liu, Hua-Yong, Zhang, Wei, Guo, Ya-Jun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Lipo, editor, Chen, Ke, editor, and Ong, Yew Soon, editor

Published
2005
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20. Catalytic effect of cesium on the oxidation behavior of cation exchange resins in Li2CO3-Na2CO3-K2CO3 melt.

Author

Zheng, Yang-Hai, Yan, Yong-De, Xue, Yun, Wang, Yue-Lin, Liu, Xin, Mi, Wan-Sheng, Zhang, Qing-Guo, Li, Yu, Ma, Fu-Qiu, Zhang, Mi-Lin, Gan, Zhi-Hao, and Zhu, Kai

Subjects
ION exchange resins, CATALYSIS, CESIUM, CESIUM ions, RADIOACTIVE wastes, LIQUID waste, HEAVY metals
Abstract

After the treatment of liquid radioactive waste, there is a certain amount of Cs in the waste resin, and these Cs-doped resins are prone to volatilize during the thermal treatment process and cause radionuclide leakage. The molten salt oxidation (MSO) can effectively prevent the volatilization of toxic metal, especially the volatilization of Cs. Under nitrogen and air conditions, it is found that the oxidation behavior between Cs-doped and clean cation exchange resins (CERs) is quite different. In the presence of oxygen and molten carbonate salt, Cs2CO3 is generated by the destruction of functional groups in Cs-doped CERs. The Cs2CO3 in Na2CO3-K2CO3-Li2CO3 reacts with oxygen to form Li2O2, which reduces the content of S in residue from 26.33 to 13.38% in air conditions at 400 °C and promotes the generation of sulfate in the molten carbonate salt. The elements Cs and S in the Cs doped CERs spontaneously form thermally stable Cs2SO4 in the molten carbonate salt. [ABSTRACT FROM AUTHOR]

Published
2022
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42. Studies on the properties of ionic liquid BMIInCl4

Author

Huang Ming, Yang Jia-Zhen, Xue Feng, Zhang Qing-guo, and Zang Shuliang

Subjects
Standard molar entropy, Chemistry, Ionic bonding, Thermodynamics, General Chemistry, Surface energy, Thermal expansion, Surface tension, Crystal, chemistry.chemical_compound, Ionic potential, Ionic liquid, Physics::Atomic and Molecular Clusters, Organic chemistry
Abstract

An ionic liquid (IL) was prepared by directly mixing InCl3 and 1-methyl-3-butylimidazolium chloride(BMIC) with molar ratio 1:1 under dry argon atmosphere. The densities, and surface tension of pure IL were determined at temperature range of (278.15 to 343.15±0.1K). The properties for ionic liquid based on group III were discussed using Glasser’s theory. The standard entropy, the surface energy and the crystal energy of ionic liquid were calculated, respectively. The crystal energy of ionic liquid is much lower than ionic solid and this is the underlying reason for forming ionic liquid at room temperature. In addition, a new theoretical model of IL, that is interstice model, was applied to calculate the thermal expansion coefficient of BMIInCl4. The order of magnitude for the thermal expansion coefficient, a, calculated by the theoretical model is in good agreement with experimental value. The result shows that there is much reasonableness for the interstice model of ionic liquid.

Published
2006

43. Thermodynamic Properties of Ionic Liquid BMIAlCl4

Author

Yang Jia-Zhen, Zhang Qing-guo, Hong Mei, and Tong Jing

Subjects
chemistry.chemical_compound, Materials science, chemistry, Ionic liquid, Thermodynamics, Physical and Theoretical Chemistry
Published
2006

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