Can 2-Propanol Form Clathrate Hydrates?

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• 作者：Kasper K. Ø ; stergaard ; Bahman Tohidi ; Ross Anderson ; Adrian C. Todd ; and Ali Danesh
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2002
• 出版时间：April 17, 2002
• 年：2002
• 卷：41
• 期：8
• 页码：2064 - 2068
• 全文大小：57K
• 年卷期：v.41,no.8(April 17, 2002)
• ISSN：1520-5045

文摘

2-Propanol is an alcohol commonly used in petroleum exploration and production operations.However, there are at present no data concerning its effects on hydrate stability available inthe open literature. Here, we present experimental hydrate equilibrium data for methane with10.0, 16.4, and 25.0 mass % 2-propanol aqueous solutions. The results show that 2-propanoldoes not have the inhibition effect which would be expected from an alcohol and may, in fact,take part in clathrate formation. Consequently, 2-propanol has been modeled as a hydrate-forming compound using a thermodynamic model. Comparisons between experimental hydratedissociation data and model predictions indicate that 2-propanol may take part in structure IIhydrate formation, occupying the large cavity of the hydrate structure. The hydrate phaseboundary for a natural gas system with a 25 mass % 2-propanol aqueous solution has also beenmeasured. The predicted hydrate stability zone, considering 2-propanol as a structure II hydrate-forming compound, is in good agreement with the experimental data, confirming the resultsobtained for methane/2-propanol hydrates.