Kinetic studies on methane hydrate formation in presence of poly(N-vinylcaprolactam) using real-time Raman spectroscopy  

Oleh:

Hong, Sang Yeon ; Park, Kyeong-nam ; Lee, SeungMin ; Lee, Ju Dong

Jenis: Article from Proceeding
Dalam koleksi: The 14th Asia Pacific Industrial Engineering and Management Systems Conference (APIEMS), 3-6 December 2013 Cebu, Philippines, page 1-7.
Topik: gas hydrate; kinetic inhibitor; PVCap; crystallization; in-situ Raman spectroscopy
Fulltext: 1252.pdf (669.18KB)

Isi artikel

In order to fully understand the influence of kinetic inhibitor (PVCap) on methane hydrate formation, kinetic experiments with in-situ Raman spectroscopic analysis were carried out in a semi-batch stirred tank reactor at constant temperature and pressure. During the hydrate formation experiment, in-situ Raman analysis provided valuable information on the time-dependent capturing behavior of guest molecules. Although the large (51262) to small cavity (512) ratio is one of the most important properties of gas hydrate in molecular-level studies, the real-time property of the cavity ratio under constant T & P conditions and agitation system have not been reported previously. In this study we measured this property from the in-situ Raman spectra during hydrate formation. The study reveals that the presence of PVCap prevents the rate of large cavity encapsulation at an early stage of hydrate formation. The present data and methodologies on the microscopic and macroscopic observations may contribute to better understanding of inhibition mechanisms, and practical applications for flow assurance in gas and oil pipelines.

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