Selective Encaging of N2O in N2O N-2 Binary Gas Hydrates via Hydrate-Based Gas Separation
SCIE
SCOPUS
Cited 28 time in
WEB OF SCIENCE
Cited 31 time in
Scopus
-
Title
- Selective Encaging of N2O in N2O N-2 Binary Gas Hydrates via Hydrate-Based Gas Separation
-
Author(s)
- Yang, Youjeong; Shin, Donghoon; Choi, Seunghyun; Woo, Yesol; Lee, Jong -Won; Kim, Dongseon; Shin, Hee-Young; Cha, Minjun; Yoon, Ji-Ho
- KIOST Author(s)
- Kim, Dong Seon(김동선)
-
Alternative Author(s)
- 김동선
-
Publication Year
- 2017-03-21
-
Abstract
- The crystal structure and guest inclusion behaviors of nitrous oxide nitrogen (N2O N-2) binary gas hydrates formed from N2O/N-2 gas mixtures are determined through spectroscopic analysis. Powder X-ray diffraction results indicate that the crystal structure of all the N2O N-2 binary gas hydrates is identified as the structure I (sI) hydrate. Raman spectra for the N2O N2 binary gas hydrate formed from N2O/N-2 (80/20, 60/40, 40/60 mol %) gas mixtures reveal that N2O molecules occupy both large and small cages of the sI hydrate. In contrast, there is a single Raman band of N2O molecules for the N2O N2 binary gas hydrate formed from the N2O/N-2 (20/80 mol %) gas mixture, indicating that N2O molecules are trapped in only large cages of the sI hydrate. From temperature-dependent Raman spectra and the Predictive Soave-Redlich-Kwong (PSRK) model calculation, we confirm the self-preservation of N2O N-2 binary gas hydrates in the temperature range of 210-270 K. Both the experimental measurements and the PSRK model calculations demonstrate the preferential occupation of N2O molecules rather than N2 molecules in the hydrate cages, leading to a possible process for separating N2O from gas mixtures via hydrate formation. The phase equilibrium conditions, pseudo-pressure composition (P-x) diagram, and gas storage capacity of N2O N-2 binary gas hydrates are discussed in detail.
-
ISSN
- 0013-936X
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/1270
-
DOI
- 10.1021/acs.est.6b05978
-
Bibliographic Citation
- ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.51, no.6, pp.3550 - 3557, 2017
-
Publisher
- AMER CHEMICAL SOC
-
Subject
- VAPOR-LIQUID-EQUILIBRIA; NATURAL-GAS; CARBON-DIOXIDE; RAMAN-SPECTRA; NITROUS-OXIDE; SPECTROSCOPIC IDENTIFICATION; THERMODYNAMIC STABILITY; CO2; PSRK; 21ST-CENTURY
-
Type
- Article
-
Language
- English
-
Document Type
- Article
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.