This project is a follow-up to the study on the impact of hydrogen on NTS polymers (Phase 1). The aim of this phase is to address the knowledge gaps identified in Phase 1 and then conduct physical testing to inform policy and procedural updates, as well as identifying in-service requirements to ensure the safe utilisation of NTS polymers in a hydrogen-pressurised environment. Unlike Phase 1, Phase 2 will also involve examining the impact of CO2 on NTS polymers by replicating the activities to include CO2
Benefits
National Gas Transmission (NGT) is committed to reducing emissions from the operation of the National Transmission System (NTS) and eliminating emissions by 2050. A key route to achieving this involves transitioning the network from natural gas to hydrogen and carbon (CCUS). Successfully transitioning from methane to a hydrogen or carbon network requires a safe use of polymeric materials. This is crucial due to the expected challenges posed by the interaction of gases (H₂/CO₂) with polymeric materials, which are part of multiple assets in the network.
Understanding gases interaction with polymeric materials through different mechanisms such us solubility, diffusivity, permeation is key to achieve material compatibility selection in line with quality and safety standards.
Learnings
Outcomes
Value tracking Data Point Data Point Definition
Maturity TRL3-4 Concept stage for compatible polymeric materials selection
Opportunity 100% or multiple asset class The project can be applied to all assets where gas facing polymers are identified
Deployment costs - Deployment costs are not known at the start of the project but will be defined throughout the project.
Innovation cost € 822,546.67 The cost includes desktop and testing activities.
Financial Savings - No direct deployment costs as this is a research project. However, costs might need to be incurred to ensure hydrogen readiness of assets with respect polymeric/elastomeric component performance.
Safety - No direct safety improvement as this is a research project. However, confirmation of polymer/elastomer performance might inform decisions on asset condition monitoring in hydrogen. NTS safety case evidence to HSE.
Environment - No direct environmental benefits as this is a research project. However, confirmation of polymer/elastomer performance might enable life extension or avoidance of replacement of assets with associated avoidance of environmental harm.
Compliance Support compliance Review guidelines, procedures
Skills & Competencies Individuals The project will inform individuals who are directly involved
Future proof Supports business strategy The project will help enable hydrogen/CO2 in the NTS and support the energy transition.
Once the project is completed, it should provide a solid foundation for informed decision-making regarding the suitability of polymeric materials in hydrogen and carbon environments. The results offer critical insights into material performance, such as resistance to degradation or permeability, which help determine whether existing assets can be safely repurposed. This knowledge enables the development of effective mitigation strategies and tailored in-service monitoring protocols, ensuring long-term reliability and safety
Lessons Learnt
The main learnings and technical knowledge can only be generated after testing has been conducted. Testing will provide insights into the performance of common polymeric materials in hydrogen and carbon environments and will support NGT in making informed decisions regarding the strategy for repurposing assets that contain polymeric components. In-service monitoring and the implementation of mitigation measures will only be feasible once the testing phase is complete.
