Objective

• To finalise the CO₂ product specification and transport option front-end engineering design for inlet and outlet of transport, and to produce designs and operating procedures to provide CO₂ to this specification.
• Develop a detailed plan for the execution phase

Major Deliverables

• Design Control Plan
• Updated Design Basis Specification
• Updated Design Criteria
• FEED Package pipeline and associated infrastructure and equipment based on the confirmed CO₂ specification
• Operating procedures required to ensure CO₂ is delivered at correct specification and reliability
• Operating procedures for start-up, shut-down, emergency shut-down, venting, situations where CO₂ delivered is out of specification, etc
• Design and operating procedures for methods of measurement, metering, monitoring and verification of CO₂
• Hazard Study 3
• Regulatory compliance.
• Updated Risk Register
• Preliminary Material Take-Offs
• Class 2 Capital and Operating Costs
• Independent Peer Review
• Forward Work Plan

Tasks

Specific tasks include the following:

• Prepare, update work scopes, design control plans functional specifications and minimum standards for new engineering deliverables
• Engage any new or additional engineering services providers
• Review lessons learnt applicable to this phase
• Update the design basis and design control plan
• Perform any tests identified in evaluate stage e.g. coating tests, evaluate data and identify any changes to design required
• Update design basis and design contol plan including
• CO₂ product specifications for CO₂ entering, during, and exiting transport, including flow rates, temperature, pressure, transportation phase i.e. gaseous / liquid / dense, detailed impurity levels, agreed with CO₂ capture and storage design teams
• Flow rates & reliability, availability & maintainability (RAM) analysis of CO₂ entering and exiting transport
• Provide input to modelling of CO₂ as required e.g. base conditions
• Evaluate results of CO₂modelling and information from capture and storage tasks and adjust design parameters design for transport as necessary. This may include consideration of:
  • CO₂ quality e.g. likely levels of impurities in captured CO₂ resulting from type of fuel and/or type of capture, likely water content resulting from transport limitations, storage site limitations on specific impurities such as sulphur/water vapour, impact of any solvent carryover into storage site
  • Pressure limitations e.g. legal limitations on pressure, diameter of pipeline under consideration, shipping or pipeline transport, any compression limitations, existing pressure in storage site, original pressure in storage site (if depleted hydrocarbon field), pressure limitations of any existing equipment etc
  • Temperature limitations e.g. cooling water temperature available at CO₂ capture/treatment site, existing temperature in storage site, transport distance and ambient temperature surrounding pipeline, likely shipping temperature
  • Route considerations e.g. proximity to populations or environmentally protected areas, other constraints
  • Intermittent or steady state flow from CO₂ source
  • Multiple CO₂ sources/transport methods
• Produce FEED design including mitigation measures for major design issues.  These mitigation methods may include:
  • Additional cleaning of CO₂ source before/after capture/conditioning e.g. water wash, dehydration, sulphur removal
  • Additional treatment of captured/conditioned CO₂ partway along transport route e.g. CO₂ booster plant, additional treatment when transferring between pipelines or changing diameter of pipeline
  • Use of pipeline for linepack to offset intermittency, resulting pressure, temperature and phase changes
  • Cooling/heating required to offset temperature impacts of pressure changes
  • Redundancy of systems / temporary storage
• Review the engineering deliverables
• Carry out initial RAM analysis
• Carry out Hazard 3 studies and Risk reviews
• Complete all regulatory reviews,
• Ensure that agreement is reached, communication between groups is maintained during define stage and selected designs are compatible along the full chain.  Periodically ensure that all groups are working to identical specifications at inlets and outlets of sections
• Finalise specifications for CO₂ entering, during, and exiting all stages of transport system, including flow rates, temperature, pressure, transportation phase i.e. gaseous / liquid / dense, detailed impurity levels, agreed with CO₂ capture and storage design teams (note CO₂ booster plant covered in CO₂ booster plant)
• Produce input to FEED cost estimates
• Identify any residual risks and mitigations for integration of CO₂ source, transport and storage.
• Produce operational procedures:
  • To ensure the reliability of the CO₂ flow meets the required specification
  • To ensure the quality of CO₂ meets specification and/or additional conditioning required is carried out
  • For startup/shudown of pipeline and associated infrastructure
  • For linepacking of pipeline
  • For control and instrumentation communication requirements so CO₂ monitoring by all parties is possible to the degree required
  • Inspection schedules taking into account possible variability in CO₂ production rates; and
  • Monitoring required to ensure that thermal fatigue is identified before it poses a health and safety risk etc
• Define any future entry points should the system be designed to allow for future access by other parties, including designs that must be adhered to
• Prepare forward work plan for the Execution stage.

Examples

• CO₂ Product Specification
• CO₂ Product

Key Personnel

• Project manager and staff (project controller and document controller)
• Transport or pipeline work-stream lead
• Engineering work-stream lead
• Process work-stream lead
• Project engineers
• Pipeline engineers
• Key engineering sub-consultants
• HAZOP team
• CCS chain integration team