Net Zero Impact on Wider Network Contents

This project aims to explore the impact of hydrogen blends (in natural gas), 100% hydrogen and carbon dioxide on contaminants (arisings) likely to be found in gas transmission pipelines (e.g. Naturally Occurring Radioactive Materials (NORMs), dusts, mill scale, welding slag, glycols, water, BTEX, methanol, heavy metals, sulphur compounds, pyrophorics as well as rotating machinery lube/seal oils and valve sealants etc).

The project will aim to understand the current composition and characteristics of any contaminants, the impact of hydrogen and carbon dioxide on the behaviour/composition/presence of contaminants, establish how long methane related contaminants will persist on the network (for repurposed pipelines), the potential for contaminants to cause pipeline gas to go ‘off-spec’ and the implications of contaminant interactions on National Transmission System (NTS) operation/integrity.