Solubility and mass transfer of H2, CH4, and their mixtures in vacuum gas oil: An experimental and modeling study

doi:10.1016/j.cjche.2019.05.010

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (12): 3000-3009.DOI: 10.1016/j.cjche.2019.05.010

• Chemical Engineering Thermodynamics • 上一篇下一篇

Solubility and mass transfer of H₂, CH₄, and their mixtures in vacuum gas oil: An experimental and modeling study

Zhigang Lei¹, Yifan Jiang¹, Yao Liu¹, Yichun Dong¹, Gangqiang Yu¹, Yanyong Sun², Ruili Guo²

1 State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China;
2 School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China

收稿日期:2019-02-21 修回日期:2019-05-09 出版日期:2019-12-28 发布日期:2020-03-17
通讯作者: Zhigang Lei, Yifan Jiang, Yao Liu, Yichun Dong, Gangqiang Yu
基金资助:
Supported by the National Natural Science Foundation of China (U1862103).

Solubility and mass transfer of H₂, CH₄, and their mixtures in vacuum gas oil: An experimental and modeling study

Zhigang Lei¹, Yifan Jiang¹, Yao Liu¹, Yichun Dong¹, Gangqiang Yu¹, Yanyong Sun², Ruili Guo²

1 State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China;
2 School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China

Received:2019-02-21 Revised:2019-05-09 Online:2019-12-28 Published:2020-03-17
Contact: Zhigang Lei, Yifan Jiang, Yao Liu, Yichun Dong, Gangqiang Yu
Supported by:
Supported by the National Natural Science Foundation of China (U1862103).

摘要/Abstract

摘要： In this work, the solubility data and liquid-phase mass transfer coefficients of hydrogen (H₂), methane (CH₄) and their mixtures in vacuum gas oil (VGO) at temperatures (353.15-453.15 K) and pressures (1-7 MPa) were measured, which are necessary for catalytic cracking process simulation and design. The solubility of H₂ and CH₄ in VGO increases with the increase of pressure, but decreases with the increase of temperature. Henry's constants of H₂ and CH₄ follow the relation of ln H=-413.05/T + 5.27 and ln H=-990.67/T + 5.87, respectively. The molar fractions of H₂ and system pressures at different equilibrium time were measured to estimate the liquid-phase mass transfer coefficients. The results showed that with the increase of pressure, the liquid-phase mass transfer coefficients increase. Furthermore, the solubility of H₂ and CH₄ in VGO was predicted by the predictive COSMO-RS model, and the predicted values agree well with experimental data. In addition, the gas-liquid equilibrium (GLE) for H₂ + CH₄ + VGO system at different feeding gas ratios in volume fraction (i.e., H₂ 85% + CH₄ 15% and H₂ 90% + CH₄ 10%) was measured. The selectivity of H₂ to CH₄ predicted by the COSMO-RS model agrees well with experimental data. This work provides the basic thermodynamic and dynamic data for fuel oil catalytic cracking processes.

关键词: H₂, CH₄, Vacuum gas oil (VGO), Solubility, Mass transfer, COSMO-RS model

Abstract: In this work, the solubility data and liquid-phase mass transfer coefficients of hydrogen (H₂), methane (CH₄) and their mixtures in vacuum gas oil (VGO) at temperatures (353.15-453.15 K) and pressures (1-7 MPa) were measured, which are necessary for catalytic cracking process simulation and design. The solubility of H₂ and CH₄ in VGO increases with the increase of pressure, but decreases with the increase of temperature. Henry's constants of H₂ and CH₄ follow the relation of ln H=-413.05/T + 5.27 and ln H=-990.67/T + 5.87, respectively. The molar fractions of H₂ and system pressures at different equilibrium time were measured to estimate the liquid-phase mass transfer coefficients. The results showed that with the increase of pressure, the liquid-phase mass transfer coefficients increase. Furthermore, the solubility of H₂ and CH₄ in VGO was predicted by the predictive COSMO-RS model, and the predicted values agree well with experimental data. In addition, the gas-liquid equilibrium (GLE) for H₂ + CH₄ + VGO system at different feeding gas ratios in volume fraction (i.e., H₂ 85% + CH₄ 15% and H₂ 90% + CH₄ 10%) was measured. The selectivity of H₂ to CH₄ predicted by the COSMO-RS model agrees well with experimental data. This work provides the basic thermodynamic and dynamic data for fuel oil catalytic cracking processes.

Key words: H₂, CH₄, Vacuum gas oil (VGO), Solubility, Mass transfer, COSMO-RS model

Zhigang Lei, Yifan Jiang, Yao Liu, Yichun Dong, Gangqiang Yu, Yanyong Sun, Ruili Guo. Solubility and mass transfer of H₂, CH₄, and their mixtures in vacuum gas oil: An experimental and modeling study[J]. 中国化学工程学报, 2019, 27(12): 3000-3009.

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Solubility and mass transfer of H₂, CH₄, and their mixtures in vacuum gas oil: An experimental and modeling study

Solubility and mass transfer of H₂, CH₄, and their mixtures in vacuum gas oil: An experimental and modeling study

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