Overview
ISO/TS 21343:2025 - "Oil and gas industries including lower carbon energy - Fuel ammonia - Requirements and guidance for boilers for power generation" provides standardized requirements and guidance for ammonia-fired boilers used in large land-based power generation (electrical output ≥ 100 MWe). The technical specification defines how manufacturers should plan and execute functional tests (at combustion test facilities during design) and acceptance tests (on-site prior to commercial operation) to verify environmental performance, particularly greenhouse gas (GHG) and other combustion emissions.
Key Topics
- Scope and applicability: Applies to boilers with burners using NH3 (any mixing ratio) as fuel; excludes heat recovery steam generators for gas turbines, fluidized bed boilers, stokers, black liquor recovery boilers and certain process heat equipment.
- Functional tests: Requirements for design-stage testing at dedicated combustion test facilities to validate burner and combustion chamber performance before fabrication.
- Acceptance tests: On-site verification at the purchaser’s installation to confirm emissions and performance under real operating conditions.
- Test methods and measurement items: Stipulates measurement items, measurement interval/steady-state definitions, fuel specifications, test conditions (holding time, load points), evaluation methods and reporting requirements.
- Combustion emissions measurement: Guidance on representative sampling points, spatial averaging, and measurement equipment for NOx and other flue gas components.
- Test reporting: Structured requirements for functional and acceptance test reports, including sample formats and fuel property documentation (see Annexes A–D).
- Ancillary equipment considerations: Includes performance expectations for downstream equipment (e.g., denitrification/SCR, air preheaters).
Applications
ISO/TS 21343:2025 is practical for:
- Boiler manufacturers and vendors designing and testing ammonia-capable boilers.
- Utilities and independent power producers (IPPs) planning conversion to or commissioning of ammonia-fuelled boilers.
- Engineering, procurement and construction (EPC) firms verifying supplier test results and acceptance criteria.
- Environmental compliance officers and regulators evaluating emissions measurement and validation practices.
- Test laboratories and combustion test facilities implementing standardized functional and acceptance test protocols.
Using this specification helps ensure consistent verification of environmental performance when deploying fuel ammonia in power generation, supporting safe, measurable decarbonization steps.
Related Standards (if applicable)
- ISO/TC 67 publications on oil and gas industry practices and terminology.
- National/regional emissions standards and permitting guidance for NOx and GHG controls (refer to local regulators).