Resolving CO2 and methane hydrate formation kinetics |
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Authors: | Michael Golombok Erik Ineke Juan-Carlos Rojas Luzardo Yuan Yuan He Pacelli Zitha |
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Institution: | (1) Shell Exploration and Production, Kessler Park 1, 2288 GS Rijswijk, The Netherlands;(2) Technische Universiteit Eindhoven, Den Dolech 2, 5600 MB Eindhoven, The Netherlands;(3) Technische Universiteit Delft, Stevinweg 1, 2628 CN Delft, The Netherlands |
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Abstract: | We analyse the kinetics of CO2 and methane hydrate formation. The characteristic formation times are associated with different steps of the formation process.
Conditions for minimising these rate times are identified while maintaining a regime where CO2 hydrate is formed and methane remains predominantly gaseous. This involves a rapid pressurisation routine and accesses points
well above the phase boundary in order to enable faster kinetics. Conditions for optimising rates and times, to obtain maximum
CO2 uptake with respect to CH4, were identified as (1) stirring faster than 1,000 rpm, (2) rapid pressurisation to a partial pressure of around 50 bar for
CO2 and (3) re-use of contaminated as opposed to fresh water. |
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