the driving forces of guest substitution in gas hydrates—a laser raman study on ch4-co2 exchange in the presence of impurities客人替换的驱动力气体保湿激光拉曼研究ch4-co2交易所存在的杂质.pdf

Energies 2012, 5, 420-437; doi:10.3390/en5020420 OPEN ACCESS energies ISSN 1996-1073 /journal/energies Article The Driving Forces of Guest Substitution in Gas Hydrates— A Laser Raman Study on CH -CO Exchange in the Presence 4 2 of Impurities Bettina Beeskow-Strauch * and Judith Maria Schicks Helmholtz Centre Potsdam, German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany; E-Mail: schick@gfz-potsdam.de * Author to whom correspondence should be addressed; E-Mail: betti@gfz-potsdam.de; Tel.: +49-331-288-1425; Fax: +49-331-288-1474. Received: 15 December 2011; in revised form: 2 February 2012 / Accepted: 14 February 2012 / Published: 22 February 2012 Abstract: The recovery of CH4 gas from natural hydrate formations by injection of industrially emitted CO2 is considered to be a promising solution to simultaneously access an unconventional fossil fuel reserve and counteract atmospheric CO2 increase. CO2 obtained from industrial processes may contain traces of impurities such as SO2 or NOx and natural gas hydrates may contain higher hydrocarbons such as C H and C H . These 2 6 3 8 additions have an influence on the properties of the resulting hydrate phase and the conversion process of CH -rich hydrates to CO -rich hydrates. Here we show results of a