西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (3): 121-125.DOI: 10.3863/j.issn.1674-5086.2009.03.028

• 油气化学工程与化工 • Previous Articles     Next Articles

EXPERIMENTAL STUDY ON PROPANE HYDRATES DISSOCIATION IN PRESENCE OF ETHYLENE GLYCOL SOLUTION

DONG Fu-hai1,2 ZANG Xiao-ya1,2 LI Dong-liang1,2 FAN Shuan-shi3 LIANG De-qing1

  

  1. 1.Key Laboratory of Renewable Energy and Gas Hydrate,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou Guangdong 510640,China;2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China;3.Key Laboratory of Enhanced Heat Transfer and Energy Conservation,MOE,South China University of Technology,Guangzhou Guangdong 510640,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

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Abstract:

The simulation experiment is carried out with different concentration of ethylene glycol solution(60.1％,69.8％,80.2％,99.5％) by a self-made visual equipment.At the beginning of the dissociation,the pressure increases rapidly and liquid temperature decreases quickly.As the dissociation processes,pressure tends gradually to be a definite value and the grades of liquid temperature are gentle.The computation shows that average dissociation rate is 3.59～7.67(mol•min-1•m-3).The change of average dissociation velocity rate with different concentration assumes the linear growth approximately.The calculated energy efficiency is 61.8%～81.5%.The calculated energy ratio is 4.89,5.73,5.97 and 6.49 respectively.Energy efficiency increases along with increase of concentration of ethylene glycol solution,but there is an inflection point during

the process.Compared with injection of pure water,the injection of ethylene

glycol reduces the dissociation heat of natural gas hydrate,accelerates the

dissociation of natural gas hydrate and increases energy efficiency and energy

ratio.Compared with injection of low concentration of ethylene glycol

solution,energy efficiency and energy ratio increase,too.

Key words: thermodynamics inhibitor, propane, hydrate, dissociation, experimental study

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