作者：
Wenkui ZhuWenli SongWeigang LinState key Laboratory of Multi-phase Complex system
the Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P.R.China Graduate School
Chinese Academy of Sciences Bejing 100190 P.R.China State key Laboratory of Multi-phase Complex system the Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P.R.China
作者：
Xin CuiXinhua LiuGuang SunToshiyuki SudaMasahiro NarukawaYunyi LiuGuogang SunGuangwen XuSchool of Chemical Engineering
Shenyang Institute of Chemical Technology Shenyang 110142 China Research Laboratory/HI Corporation Ltd.(/HI) Isogo-Ku Yokohama 235-8501 Japan Faculty of Chemical Engineering China University Of Petroleum (Beijing) Beijing 102249 China School of Chemical Engineering Shenyang Institute of Chemical Technology Shenyang 110142 China State Key Laboratory of Multi-Phase Complex System
Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Faculty of Chemical Engineering
China University Of Petroleum (Beijing) Beijing 102249 China State Key Laboratory of Multi-Phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Multi-Phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China
The calculating models of mass action concentrations for electrolyte aqueous solutions NaBr-H2O, LiNO3-H2O, HNO3-H2O, and KF-H2O have been developed at 298.15 K and their molalities ranging from 0.1 mol/kg to saturati...
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The calculating models of mass action concentrations for electrolyte aqueous solutions NaBr-H2O, LiNO3-H2O, HNO3-H2O, and KF-H2O have been developed at 298.15 K and their molalities ranging from 0.1 mol/kg to saturation according to the ion and molecule coexistence theory as well as mass action law. The calculated mass action concentration is based on pure species as the standard state and the mole fraction as the concentration unit, and the reported activities are usually based on infinite dilution as the standard state and molality as the concentration unit. Hence, the calculated mass action concentration must be transformed to the same standard state and concentration unit. The transformation coefficients between calculated mass action concentrations and reported activities of the same component fluctuate in a very narrow range. Thus, the transformed mass action concentrations not only agree well with reported activities, but also strictly obey mass action law. The calculated results show that the new developed models can embody the intrinsic structure of investigated four electrolyte aqueous solutions. The results also indicate that mass action law has its widespread applicability to electrolyte binary aqueous solutions.
The velocity profiles and temperature distributions of gas flow in microchannels, for Knudsen numbers ranging from 0.01 to 0.20, are investigated with pseudo-particle modeling (PPM). It has been found that the velocit...
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The velocity profiles and temperature distributions of gas flow in microchannels, for Knudsen numbers ranging from 0.01 to 0.20, are investigated with pseudo-particle modeling (PPM). It has been found that the velocity profiles are mainly affected by Knudsen number and the external force fields applied. When Knudsen number was increased, the slip velocities on the walls increased at the beginning, and then decreased. The temperature distributions were also significantly affected by the external force. The Darcy friction factor increased with increasing Knudsen number, and its variation with Mach number under increased Knudsen number was similar to the so-called premature laminar-turbulent transition observed in experiments.
A high performance liquid chromatography(HPLC) method was proposed to monitor the synthesis and purification of the 1-alkyl-3-methylimidazolium ionic liquid precursors from alkylation of 1-methylimidazole with alkyl h...
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A high performance liquid chromatography(HPLC) method was proposed to monitor the synthesis and purification of the 1-alkyl-3-methylimidazolium ionic liquid precursors from alkylation of 1-methylimidazole with alkyl halides and determine the purity of final *** results showed that separation of 1-methylimidazole from the precursors could be obtained under the HPLC performance conditions such as cation exchange column,acetonitrile/KH2PO4 aqueous solution and 209 nm *** content of unreacted 1-methylimidazole in the precursors could be easily calculated from their corresponding HPLC peak areas with the calibration curve of *** retention times of the 1-alkyl-3-methylimidazolium ionic liquid precursors decreased with their increasing alkyls,and the ionic liquids with the same cation and different anions had almost the same retention times.
In order to eliminate the global warming effect, it is highly required to develop new technologies with lower or zero emission of CO2 to the environment. In this work, a fluidized bed coal gasifier with in-situ fixati...
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ISBN:
(纸本)9780816910229
In order to eliminate the global warming effect, it is highly required to develop new technologies with lower or zero emission of CO2 to the environment. In this work, a fluidized bed coal gasifier with in-situ fixation of CO2 is simulated by developing a comprehensive two-dimensional unsteady state model. Eddy Dissipation Concept (EDC) model is adopted for describing the turbulent mixing and detailed chemical kinetics simultaneously. The profiles of temperature, velocity and reaction rate, and particle trajectories are predicted and analyzed, also the mechanism of flow and reaction, including the in-situ fixation process of CO2, is discussed. Comparing with the traditional coal gasifier without CaO, a much higher concentration of H2 (traditional: 5.78 vol%, present: 65.43 vol%) and lower concentration of CO (traditional: 37.15 vol%, present: 10.51 vol%) and CO2 (traditional: >45 vol%, present: 14.05 vol%) are obtained.
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