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Calculation of partial molar volume of components
in supercritical ammonia synthesis system |
| WANG Cunwen1, CHEN Wen1, WANG Weiguo1, WU Yuanxin1, ZHANG Junfeng1, YU Chuanbo2 |
| 1.Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Wuhan Institute of Technology; 2.Chemistry and Biology Engineering College, Panzhihua University; |
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Abstract The partial molar volumes of components in supercritical ammonia synthesis system are calculated in detail by the calculation formula of partial molar volume derived from the R-K equation of state under different conditions. The objectives are to comprehend phase behavior of components and to provide the theoretic explanation and guidance for probing novel processes of ammonia synthesis under supercritical conditions. The conditions of calculation are H2/N2 = 3, at a concentration of NH3 in synthesis gas ranging from 2% to 15%, concentration of medium in supercritical ammonia synthesis system ranging from 20% to 50%, temperature ranging from 243 K to 699 K and pressure ranging from 0.1 MPa to 187 MPa. The results show that the ammonia synthesis system can reach supercritical state by adding a suitable supercritical medium and then controlling the reaction conditions. It is helpful for the supercritical ammonia synthesis that medium reaches supercritical state under the conditions of the corresponding total pressure and components near the normal temperature or near the critical temperature of medium or in the range of temperature of industrialized ammonia synthesis.
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Issue Date: 05 December 2008
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doi:10.1016/0009-2509(72)80143-X
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