CO2 injection into submarine sediments: disturbing news for methane-rich hydrates.

Bigalke, Nikolaus K., Kossel, Elke , Deusner, Christian , Savy, Jean-Philippe and Haeckel, Matthias and Heriot-Watt-University (2011) CO2 injection into submarine sediments: disturbing news for methane-rich hydrates. [Poster] In: 7. International Conference on Gas Hydrates (ICGH 2011). , 17.-21.07.2011, Edinburgh, Scotland, United Kingdom . Proceedings of the 7th International Conference on Gas Hydrates (ICGH2011). ; 591/1-9 .

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The production of natural gas via injection of fossil-fuel derived CO2 into submarine gas hydrate reservoirs can be an example of tapping a hydrocarbon energy source in a CO2-neutral manner. However, the industrial application of this method is technically challenging. Thus, prior to feasibility testing in the field, multi-scale laboratory experiments and adapted reaction-modeling are needed. To this end, high-pressure flow-through reactors of 15 and 2000 mL sample volume were constructed and tested. Process parameters (P, T, Q, fluid composition) are defined by a fluid supply and conditioning unit to enable simulation of natural fluid-flow scenarios for a broad range of sedimentary settings. Additional Raman- and NMR-spectroscopy aid in identifying the most efficient pathway for CH4 extraction from hydrates via CO2 injection on both microscopic and macroscopic level. In this study we present experimental set-up and design of the highpressure flow-through reactors as well as CH4 yields from H4-hydrate decomposition experiments using CO2-rich brines and pure liquefied CO2.

Document Type: Conference or Workshop Item (Poster)
Keywords: Meeresgeologie; CO2 injection, hydrate conversion, CH4 extraction, hydrate-bearing sediments, gas hydrates, CCS, energy, methane
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Refereed: No
Date Deposited: 15 Mar 2012 12:18
Last Modified: 16 Mar 2012 04:57

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