If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Spectroscopy of Hydrothermal Reactions. Part XI: Infrared Absorptivity of CO2 and N2O in Water at Elevated Temperature and Pressure

$29.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The temperature dependence of the infrared absorptivity of the asymmetric stretch of CO2 and N2O dissolved in H2O was determined at 300-600 K under 275 atm. These results are essential for using these species as internal calibrants of the rate of many hydrothermal reactions by infrared spectroscopy. The absorptivity (band area) for upsilon3 (CO2) at constant number density increases from 1.58 X 10 4 cm/mmol at 300 K to 2.68 X 10 4 cm/mmol at 600 K. The absorptivity of upsilon3 (N2O) is 8.57 X 10 3 cm/mmol at 300 K and 1.33 X 10 4 cm/mmol at 525 K. The absorptivity is suppressed in the presence of H2O by a factor of about 5 compared to results for the gas phase. The absorptivity increases, however, with increasing temperature in H2O solution, which is opposite the trend for the gas phase. The Lorentzian line shape in H2O solution provides a global relaxation time of 1 ps, which is more consistent with relaxation by vibrational energy transfer among associated molecules than by collisions or stochastic modulation by the surrounding H2O field.

Keywords: INFRARED SPECTROSCOPY ABSORPTIVITY TEMPERATURE EFFECTS DISSOLVED GASES CO2 H2O

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702991946578

Publication date: March 1, 1999

More about this publication?
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more