Measurement and reduction of methane emissions

Purpose

In addition to the negative climate impact, there are also several safety and work environment reasons. Methane gas is combustible and can be ignited at a concentration of about 4-16% by volume in air. Methane itself is an odorless gas, but methane leakage can also mean emissions of other foul-smelling gases, which affects employees and nearby residents. Finally, there is also an economic aspect, as methane gas has a commercial value and emissions mean lost revenue. Avfall Sverige and Svenskt Vatten work together to ensure that industry members reduce their methane emissions. More and more gas plants are voluntarily joining the Self-Control Methane Emissions program, also called EgMet. The voluntary commitment includes having an independent measurement consultant carry out leak detection and emission measurements at the facility every three years. For many years, RISE, as an independent measuring institute, has carried out sampling and leakage tests on many different types of emission sources. With adequate process knowledge and advanced analysis technology, RISE can help you gain better control of your methane emissions. 

Leak detection

Part of the voluntary commitment is to regularly and systematically carry out leak detection at the facility. With an optical OGI (FLIR) methane camera, RISE can detect gas leaks that cannot be seen with the naked eye. The leaks are clearly visualized in the form of films or still images. With the help of the camera, the leak detection can be done quickly and efficiently, both indoors and outdoors.

Emission measurements and advanced analysis technology

The methane content is analyzed in a FID, ie a flame ionization detector. Measurements are performed continuously over a certain period of time or as individual samples. The emissions are quantified by also measuring the flow. Measurement methods used are based on Avfall Sverige's handbook for methane measurements. The methods are developed from international standards e.g. how to measure flows in channels. The results are presented in a clear report with individual emission sources described and proposals for measures to support the own improvement work. The results can also be used in sustainability declarations.

Longest experience of EgMet measurements

RISE has for many years built up a solid knowledge of the entire process and can today quickly identify so-called hot-spots, where leakage usually occurs, which saves time in the search. RISE has a broad network in the area, not only in Sweden, but also internationally. For example, we have conducted a comparative study of several different measurement techniques in Europe. Work is also underway to standardize emission measurements from biogas plants in Europe. We have also helped to produce world-unique statistics on methane emissions from various processes and technologies.

Method

Avfall Sverige's handbook for methane measurements

Deliveries

The results are presented in a clear report with individual emission sources described and proposals for measures to support the own improvement work. The results can also be used in sustainability declarations.