CO₂ hydrate slurry transportation in carbon capture and storage

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Based on a proposed hydrate-based gas separation and the utilization of this technology, CO<SUB>2</SUB> hydrate slurry transportation in pipeline from capture plants to storage sites is proposed in this paper. Two different transport processes are considered in the present study. The concept of CO<SUB>2</SUB> hydrate slurry transportation in pipelines has many advantages over the current approaches of CO<SUB>2</SUB> transportation. Transferring CO<SUB>2</SUB> in hydrate slurry status reduces energy input for transportation and eliminates of hydrate blockage in pipelines thus reducing the overall cost of gas transportation. The effect of CO<SUB>2</SUB> hydrate slurry formation in the absence and presence of anti-agglomerants is investigated in an experimental flow loop. The effect of four low dosages of 0.3, 0.5, 0.7 and 1.0wt% of anti-agglomerant; Tween 80 (non-ionic surfactant) on CO<SUB>2</SUB> hydrate is investigated. Discussions on CO<SUB>2</SUB> hydrate formation kinetics, induction time, slurry density and slurry flow within the experimental loop are provided. In the experiment, hydrate mass fraction ranged from 8 to 32%. The result indicates that CO<SUB>2</SUB> hydrate slurry flow and circulation in the flow loop is significantly enhanced with anti-agglomerant.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hydrate slurry mass fraction generated in the tests ranged from 8 to 32wt%. </LI> <LI> Circulation status for CO<SUB>2</SUB> hydrate slurry in a pipeline is highly enhanced with AA. </LI> <LI> CO<SUB>2</SUB> hydrate slurry was produced and maintained during circulation for an hour. </LI> </UL> </P>