Air

Air emissions

We also monitor emissions worldwide of air pollutants in accordance with relevant local legislation. The largest part of our production, the operation of air separation plants, is virtually free of direct emissions to air. Other production processes (for example, combustion processes in hydrogen plants or steam boilers) can result in emissions of inorganic gases such as carbon monoxide (CO), sulphur oxides (SOX) and nitrogen oxides (NOX). However, compared with CO2 emissions, these comprise an extremely small proportion of our emissions. Volatile organic compounds (VOCs) are mainly released during the coating and cleaning of metals used for instance in gas cylinders, storage tanks and plant components.

We work together with our customers and with scientific and research partners to devise solutions which will minimise emissions to air. Our LoTOx™ technology is being used for example in the chemical industry to capture and store nitrogen oxides and other pollutants from waste gases arising from combustion processes. By the end of 2017, we had installed more than 30 such systems in customers’ plants around the world, especially in the United States and China. With these systems, we enabled our customers to avoid more than 14,500 tonnes of NOx emissions in 2017.

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Emissions to air (in tonnes)1,2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2017

 

2016

 

2015

 

2014

 

2013

1

In line with the information in the Financial Report 2017, the figures provided for the years 2015, 2016 and 2017 exclude the business of the logistics service provider Gist, as it has been reported as a discontinued operation.

2

In 2014, Linde has refined the determination method for emissions to the air. Where available, measurements were used for the new methodology. For production sites for which no measurements were available, we estimated the figures. Where possible, the reported figures for 2013 were recalculated based on these new methods. The determination method for VOC emissions could not be applied retroactively. Therefore, the values for this indicator are not comparable for the years 2013 and 2014.

3

The determination method for ammonia was revised during 2015. Reported ammonia emissions include uncontrolled releases to the atmosphere and since 2015 have been extended to include controlled releases to abatement systems at certain sites. The figure for 2014 has been adjusted accordingly.

Geprüft von KPMG

Audited by KPMG

VOC (volatile organic compounds)Geprüft von KPMG

 

535

 

531

 

598

 

657

 

92

NH3 (ammonia)3Geprüft von KPMG

 

37

 

45

 

73

 

165

 

12

CO (carbon monoxide)Geprüft von KPMG

 

2,679

 

2,634

 

3,213

 

3,325

 

2,177

NOx (nitrogen oxides)Geprüft von KPMG

 

5,065

 

4,879

 

6,443

 

6,762

 

6,273

SOx (sulphur oxides)Geprüft von KPMG

 

580

 

685

 

708

 

447

 

122

GRI Indicators

UNGC Indicators

Sustainable Development Goals