ISO 27919-2:2021

Overview

ISO 27919-2:2021, "Carbon dioxide capture - Part 2", defines an evaluation procedure to assure and maintain stable performance of post‑combustion CO2 capture (PCC) plants integrated with a power plant. The standard provides definitions, guidelines, and supporting information for evaluating and reporting design items and operational results so that the designed performance of a PCC plant (liquid‑based chemical absorption) is realized and sustained. The physical boundary addressed is a single power plant with an optional auxiliary thermal unit and a single PCC plant as described in ISO 27919‑1.

Key topics and requirements

• Performance assurance procedure: A stepwise evaluation flow to ensure reliable performance through design, construction and routine operation.
• Definitions and symbols: Common terminology and KPI definitions for consistent reporting.
• Reliability, availability and maintainability (RAM): Methods to evaluate and quantify availability, reliability and maintainability specific to PCC plants, including spatial and temporal boundaries for assessment.
• Operational evaluation: Guidelines for assessing steady and transient operation, start‑up/shutdown, emergency operation, downtime and operator training.
• KPI reporting: Metrics for capacity availability, CO2 producibility, schedule compliance, time availability and on‑stream factor, with calculation examples provided in annexes.
• Maintenance implications: Strategies and practices to guide ongoing maintenance programmes to preserve designed performance.
• Annexed guidance: Informative annexes cover a detailed evaluation procedure, reference plant experience, technology qualification, influence classification on availability and KPI calculation examples.

Note: ISO 27919‑2 does not provide benchmarks for comparing different capture technologies (absorbents) nor does it specify particular operating conditions (e.g., temperatures).

Practical applications

• Validating that a PCC plant will meet contractual performance and emissions targets when integrated with a host power plant.
• Establishing KPI frameworks and reporting formats for owners, operators and stakeholders to track CO2 capture performance.
• Guiding design reviews and construction QA to minimize future unavailability and ensure maintainability.
• Informing maintenance planning, operator training and procedures to sustain CO2 producibility for downstream transport and geological storage.
• Supporting project due diligence, regulatory reporting and performance guarantees in CCS projects.

Who should use this standard

• Power plant owners and operators integrating PCC units
• PCC plant designers and engineering contractors
• Operation & maintenance planners and reliability engineers
• Project developers, investors and regulators involved in CCS deployment
• Technical authorities preparing performance contracts and acceptance testing

Related standards

• ISO 27919‑1 - Performance evaluation methods for post‑combustion CO2 capture integrated with a power plant (reference for KPI definitions and methodology).
• ISO 27919 series (other parts under ISO/TC 265) for broader CCS standardization.