Abstract: Transportation safety of supercritical CO2 pipeline is a key aspect of Carbon Capture and Storage(CCS). For reducing the high pressure in supercritical pipeline when accidental cases arise, man-made release will be applied using chocking process. The downstream parameters of chocking process can be predicted based on the adiabatic process assumption. The presence of SO2 as an impurity is helpful for increasing the downstream temperatures through the chocking device to prevent the frozen hazard, whereas the presence of N2 as an impurity indicates a lower downstream temperature. The higher initial temperature can prevent the dry ice formation at the outlet of vent pipe when the multistage chocking is applied

• Publication Date: 02-Jun-2014
• DOI: 10.15224/978-1-63248-009-5-99
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Abstract: A Higee-scrubber, in the form of a rotating packed bed, has shown dramatic improvement in its absorption performance as compared with a conventional scrubber. But the absorption is often limited to hydrophilic volatile organic compounds (VOCs) with water-based solvents, simply because hydrophobic VOCs are relatively insoluble in the aqueous system. In this report, we experimentally demonstrated that this novel Higee-scrubber could handle dual-solvent (e.g. water/silicone oil) properly due to its centrifugal force. Consequently, simultaneous removal of both hydrophobic VOC (e.g. toluene) and hydrophilic VOC (e.g. isopropanol) was efficiently accomplished in a single unit. This Higee-scrubber showed not only the superior absorption performance but also the capability of handling solvents of significant viscosity difference and immiscibility, thus, drastically expanding its applicability.

• Publication Date: 02-Jun-2014
• DOI: 10.15224/978-1-63248-009-5-100
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