Ethylene Separation via Hydrate Formation in W/O Emulsions

Yong Pan, Huang Liu, Zhi Li, Bei Liu, Qinglan Ma, Guangjin Chen, Changyu Sun, Lanying Yang and Xueteng Gao
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Yong Pan: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Huang Liu: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Zhi Li: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Bei Liu: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Qinglan Ma: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Guangjin Chen: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Changyu Sun: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Lanying Yang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Xueteng Gao: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Energies, 2015, vol. 8, issue 6, 1-11

Abstract: An hybrid absorption-hydration method was adopted to recover C 2 H 4 from C 2 H 4 /CH 4 binary gas mixtures and the hydrate formation conditions of C 2 H 4 /CH 4 mixtures was studied experimentally in diesel in water (w/o) emulsions. Span 20 at a concentration of 1.0 wt% in the aqueous phase was added to form water in diesel emulsions before hydrate formation and then hydrate in diesel slurry was separated after hydrate formation. The influences of initial gas-liquid volume ratio (53–142), pressure (3.4–5.4 MPa), temperature (274.15–278.15 K), water cuts (10–30 vol%), and the mole fraction of C 2 H 4 in feed gas (13.19–80.44 mol%) upon the C 2 H 4 separation efficiency were systematically investigated. The experimental results show that ethylene can be enriched in hydrate slurry phase with high separation factor ( S ) and recovery ratio ( R ). Most hydrate formation finished in 20 min, after that, the hydrate formation rate became very slow. The conclusion is useful for determining the suitable operation conditions when adopting an absorption-hydration method to separate C 2 H 4 /CH 4 .

Keywords: separation; hydrate; ethylene; methane; water in oil emulsion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
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