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Gas Quality

IGEM Gas Quality Working Group

IGEM is currently working on the production of a standard covering UK gas quality specification in order to facilitate a change from GS(M)R that reflects the available alternative sources of gas and aligns with the European standard. The Standard will set the Wobbe index (WI) range appropriate for the UK initially examining the extension of the upper range. The specification will also seek the further widening in the lower range at an appropriate stage. the review will consider the impact of Emergency Specification, the interaction with the wider ENA GS(M)R review process and impact in Europe (CEN Standard and Security of Supply Regs.

A core group has been set up to drive the production of the standard and to ensure the entire supply chain issues are addressed. 4 meetings have taken place with the 5th planned for the beginning of next year. 

The minutes from the 9 meetings held so far, a database including all of the evidence circulated and the current action list are available to view under the resources panel.

Impact on Industrial and Commercial Users

As part of the work being undertaken by the group, DNV GL have been tasked with looking at the impacts of gas quality on industrial and commercial users. The project will explore the effects of a wider gas Wobbe Index including blended hydrogen mixtures (containing up to 20 mol% hydrogen) by researching the measures in place around the world to ensure safe and efficient combustion of wider specification gas.  The research will also include the effects of rate of change of Wobbe Index. The industrial and commercial equipment examined will be greater than 1 MW in size and the research will also consider any instrumentation which measures, or may be affected by, gas quality.

The range of Wobbe Index for this study is 45.67 to 53.25 MJ/m3 (compared with the existing GS(M)R range of 47.20 to 51.41 MJ/m3). This range is not exclusive and information within and outside of this range will be considered.

A questionnaire has been created to assess the potential impact on UK industry of a wider range of gas quality.  DNV GL will study the types of plant and control systems which currently exist in the UK and whether these would need to be adjusted or modified to accommodate wider gas Wobbe Index limits.

Please click here to see the questionnaire and return any completed forms by email to technical@igem.org.uk by 15th December 2017

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