| Vapor-hydrate phases equilibrium of （CH4＋C2H6） and （CH4＋C2H4） systems |
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| 作者单位： | High Pressure Fluid Phase Behavior ＆ Property Research Laboratory, China University of Petroleum, Beijing 102249, China |
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| 摘 要： |
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| 关 键 词： | 水化物 气体分离 CH4 C2H6 C2H4 蒸汽 |
Vapor-hydrate phases equilibrium of (CH4+C2H6) and (CH4+C2H4) systems |
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| Authors: | Ma Qinglan Chen Guangjin Zhang Lingwei |
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| Affiliation: | (1) High Pressure Fluid Phase Behavior & Property Research Laboratory, China University of Petroleum, Beijing, 102249, China |
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| Abstract: | Separation of the (C1 + C2) hydrocarbon system is of importance in natural gas processing and ethylene production. However it is the bottleneck because
of its high refrigeration energy consumption, and needs to be urgently addressed. The technology of separating gas mixtures
by forming hydrate could be used to separate (C1 + C2) gas mixtures at around 0 °C and has attracted increasing attention worldwide. In this paper, investigation of vapor-hydrate
two-phase equilibrium was carried out for (C1 + C2) systems with and without tetrahydrofuran (THF). The compositions of vapor and hydrate phases under phase equilibrium were
studied with model algorithm when structure I and structure II hydrates coexisted for the (methane + ethane) system. The average
deviation between the modeled and actual mole fractions of ethane in hydrate and vapor phases was 0.55%, and that of ethylene
was 5.7% when THF was not added. The average deviation of the mole fraction of ethane in vapor phase was 11.46% and ethylene
was 7.38% when THF was added. The test results showed that the proposed algorithm is practicable. |
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| Keywords: | Chen-Guo model vapor-hydrate equilibrium gas separation |
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