Project
December 2024
CO2 Line Packing
Project Phases
- Identify
Technology Areas
- CCUS
Service Areas
- Technical Solutions
Project Location
- UK
Storage concepts require a continuous flow of CO2 to inject into the stores to allow steady operation. This should support stable storage by avoiding possible halite formation that could impact the integrity and capacity of the store. For shipped based concepts maintaining continuity has additional complexity due to logistical disturbances.
A concept to smooth the injection profile should there be any logistics issues with the CO2 vessels, is to utilise a currently decommissioned pipeline as buffer storage. This is similar to line packing technique currently used by natural gas networks to match supply with demand.
Motivation:
The purpose of this study was to determine the total mass of CO2 that could be line packed into an existing pipeline and to estimate the duration for which it could continue supplying CO2 in the event of a shipment interruption caused by logistical factors such as weather disruptions.
Our Approach:
The following approach was used to inform the client, including:
- A literature review on line packing of CO2 pipelines to determine fundamentals and feasibility
- Clarified assumptions for the basis of study
- Calculated volume, discharge time and mass of CO2 based on the operating pressures of specific pipelines
- Highlighted opportunities to increase capacity and discharge time
- Provided indicative cost comparison of onsite buffer storage vs line packing
- Provided clarification on impact to system uptime
Benefit and Impact:
Concept methodology which can be applied to other pipelines for determining potential buffer storage and discharge time to support a smooth injection profile. Increasing awareness of the effects that different equations of state have on CO2 thermodynamic behaviour.
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