
GERG – the European Gas Research Group presented its approach to identifying gas quality research priorities at the ENTSOG Gas Quality Workshop 2026, held on 5 November 2026 in Brussels, Belgium. The presentation highlighted how GERG’s Working Groups translate industry needs on gas quality into collaborative research, development and innovation projects in the biomethane, carbon capture, utilisation and storage (CCUS), and hydrogen fields. Miguel Ballesteros, Programme Delivery Manager at GERG, also presented findings from European research projects in which GERG has been involved, showcasing their contributions to addressing gas quality challenges.
GERG’s Biomethane Working Group has identified more than 30 research topics related to gas quality, covering areas such as gas composition, trace components, siloxanes, sulphur, terpenes, odourisation, analysers, meters and energy allocation. Key priorities include defining gas quality monitoring requirements for network operators, benchmarking existing and emerging analysers, developing best practices for measuring trace components and assessing the impact of specific compounds on infrastructure and equipment. The presentation also highlighted further knowledge gaps, including interactions between gas components, volatile organic compounds (VOCs), argon and the effects of siloxanes on porous underground gas storage rocks.
Within the CCUS Working Group, members identified several research needs related to CO₂ quality, including identifying common purification methods and developing common quality specifications for European CO₂ networks. Other priorities include advancing online CO₂ quality monitoring, developing real-time sensors for dense-phase CO₂ transport and establishing equations of state to model the phase behaviour of CO₂ mixtures in transport and storage systems. Meanwhile, GERG’s Hydrogen Working Group has identified gas quality and metering, alongside purification technologies, as key cross-cutting research areas across the hydrogen value chain.
The presentation also showcased findings from two European research projects in which GERG has been a partner, BioSTaR2c and SHIMMER, both of which ended in 2026. BioSTaR2c contributed to the CEN Biomethane multi-phase initiative, supporting CEN/TC 408 and the revision of EN 16723. Its findings provided valuable insights into the effects of siloxanes on industrial boilers, sulphur on natural gas vehicles, oxygen on underground gas storage and the impact of corrosive compounds.
Meanwhile, SHIMMER investigated gas-quality measurement technologies for hydrogen injection and incorporated gas-quality tracking into an open-source fluid-dynamic model. These outputs upgrade the understanding of how gas quality parameters influence hydrogen admissibility in existing gas networks.
Looking ahead, GERG also presented two upcoming biomethane research initiatives. Biomethane-Related Gas Quality Deviations and Cost-Effective Specification Setting aims to identify which gas quality components in biomethane differ from natural gas specifications, determine which differences are specific to biomethane, and assess whether they require further measures in the natural gas chain.. Meanwhile, Grid Management Balancing Biomethane Networks will investigate operational practices, technical measures and challenges associated with biomethane injection into European gas grids.
GERG’s participation in the ENTSOG Gas Quality Workshop 2026 highlighted its role in addressing the evolving requirements of Europe’s gas infrastructure. By bringing together industry expertise and collaborative research across Europe, GERG continues to identify knowledge gaps, connect existing research activities and support the development of practical solutions across the gaseous fuels value chain.























