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In order to contain NOx emissions, Snam has launched a programme over the years to replace traditional turbines with low-emission turbines (DLE) which, to date, account for almost all of those installed for the Group and 100% of those present at the storage sites

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The average NOx emissions for installed capacity improved compared to 2020 and were 3 and 3.8 [mg/Nm3]/MW for storage and thrust, respectively.

 

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NOx emissions into the atmosphere are determined based on direct measurements or, if these are not available, on emission factors present in the relevant literature (the EMEP/EEA Air Pollutant Emission Inventory Guidebook of the European Environment Agency)

Using natural gas as the main energy source minimizes emissions of sulfur oxides and dust, compared to using other fossil fuels. In fact, SOx emissions are negligible and as regards VOC emissions (volatile organic compounds) the only ones are those of natural gas (see page Group indicators ). In fact, the only significant emissions are those of nitrogen oxides (NOx) , that derive mainly from the combustion of natural gas in the gas turbines installed in the compression plants (thrust and storage).

The increase in consumption for gas transport (+51%) resulted in a 38% increase in total NOx emissions compared to 2020, from 403 to 558 tonnes. This increase is mainly due to the supply of gas from the North African backbone, which is more energy intensive, but is in any case lower than the increase in fuel gas thanks to the actions implemented by Snam in recent years with the launch of a programme to replace traditional turbines with low-emission turbines (DLE). In fact, the average NOx emissions for installed capacity improved compared to 2020 and were 3 and 3.8 [mg/Nm3]/MW for storage and thrust, respectively.

Total NOX Emission (t)

 

NOX emission / energy used

 

NOX atmospheric emissions are determined based on direct measurements or, where these are not available, on emission factors present in the relevant literature (the EMEP/EEA “Air Pollutant Emission Inventory Guidebook”).


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updated
03 May 2022 - 17:56 CEST