In situ Study of Mass Transfer in Aqueous Solutions under High Pressures via Raman Spectroscopy: A New Method for the Determination of Diffusion Coefficients of Methane in Water near Hydrate Formation Conditions

2006 ◽  
Vol 60 (2) ◽  
pp. 122-129 ◽  
Author(s):  
W. J. Lu ◽  
I. M. Chou ◽  
R. C. Burruss ◽  
M. Z. Yang
Keyword(s):  
Mass Transfer ◽  
Raman Spectroscopy ◽  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
High Pressures ◽  
Hydrate Formation ◽  
In Situ Study ◽  
Formation Conditions

scholarly journals Self-preservation and structural transition of gas hydrates during dissociation below the ice point: an in situ study using Raman spectroscopy

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Jin-Rong Zhong ◽  
Xin-Yang Zeng ◽  
Feng-He Zhou ◽  
Qi-Dong Ran ◽  
Chang-Yu Sun ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Gas Hydrates ◽  
Structural Transition ◽  
In Situ Study

Precise Determination of Percent Cure of Epoxide Polymers and Composites via Fiber-Optic Raman Spectroscopy and Multivariate Analysis

1997 ◽  
Vol 51 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Jeffrey F. Aust ◽  
Karl S. Booksh ◽  
Christopher M. Stellman ◽  
Richard S. Parnas ◽  
Michael L. Myrick
Keyword(s):  
Raman Spectroscopy ◽  
Multivariate Analysis ◽  
Real Time ◽  
Fiber Optic ◽  
Precise Determination ◽  
Probe Design ◽  
Epoxide Polymers ◽  
Time Determination

A method for real-time determination of the percent cure of epoxies via in situ fiber-optic Raman spectroscopy has been developed. This method utilizes a probe design developed for real-time monitoring of polymer curing and multivariate analysis to interpret the data and determine percent cure. This method was demonstrated to be reliable to ±0.54% of cure in laboratory samples over a 50–99% cure range. A preliminary study measuring cure percentage in an industrial, glass-reinforced composite has been shown to be reliable to ±0.82% in the 40–90% cure range.

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