Field Studies on the Formation of Sinking CO2 Particles for Ocean Carbon Sequestration: Effects of Injector Geometry on Particle Density and Dissolution Rate and Model Simulation of Plume B
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- 作者：David E. Riestenberg ; Costas Tsouris ; Peter G. Brewer ; Edward T. Peltzer ; Peter Walz ; Aaron C. Chow ; and E. Eric Adams
- 刊名：Environmental Science & Technology
- 出版年：2005
- 出版时间：September 15, 2005
- 年：2005
- 卷：39
- 期：18
- 页码：7287 - 7293
- 全文大小：303K
- 年卷期：v.39,no.18(September 15, 2005)
- ISSN：1520-5851
文摘
We have carried out the second phase of field studies todetermine the effectiveness of a coflow injector whichmixes liquid CO2 and ambient seawater to produce a hydrateslurry as a possible CO2 delivery method for oceancarbon sequestration. The experiments were carried outat ocean depths of 1000-1300 m in Monterey Bay, CA, usinga larger injector than that initially employed underremotely operated vehicle control and imaging of theproduct. Solidlike composite particles comprised of water,solid CO2 hydrate, and liquid CO2 were produced in bothstudies. In the recent injections, the particles consistentlysank at rates of ~5 cm s-1. The density of the sinkingparticles suggested that ~40% of the injected CO2 wasconverted to hydrate, while image analysis of the particleshrinking rate indicated a CO2 dissolution rate of 0.76-1.29 
mol cm-2 s-1. Plume modeling of the hydrate compositeparticles suggests that while discrete particles may sink 10-70 m, injections with CO2 mass fluxes of 1-1000 kg s-1would result in sinking plumes 120-1000 m below the injectionpoint.
mol cm-2 s-1. Plume modeling of the hydrate compositeparticles suggests that while discrete particles may sink 10-70 m, injections with CO2 mass fluxes of 1-1000 kg s-1would result in sinking plumes 120-1000 m below the injectionpoint.