Air emissions

Air emissions

We monitor emissions worldwide not only of greenhouse gases but also of air pollutants in accordance with relevant local legislation. Normally, the operation of our air separation plants results in hardly any direct emissions to air. Other production processes, for example in hydrogen plants and steam boilers, can result in emissions of inorganic gases such as carbon monoxide (CO), sulphur oxides (SOX) and nitrogen oxides (NOX). Volatile organic compounds (VOCs) are mainly released during the coating and cleaning of metals such as those used in gas cylinders, storage tanks and plant components.

We work together with our customers and with scientific and research partners to develop solutions which will reduce emissions to air. LoTOx™ technology is being used, for example, to capture and store nitrogen oxides from waste gases arising from combustion processes. By the end of 2015, we had installed more than 30 such systems in customers’ plants around the world, especially in the United States and China. These systems are capable of preventing more than 17,000 tonnes of NOX per annum being emitted into the air.

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Emissions to air1 (in tonnes)

 

 

 

 

 

 

 

 

 

 

 

2015

 

2014

 

2013

 

2012

Geprüft von KPMG

Assured by KPMG

1

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.

2

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 restated accordingly.

As a result of the application of the revised accounting standards, the sites in the scope of our reporting changed in the 2013 financial year. Accordingly, the key financial, environmental and employee KPIs for 2012 were adjusted retrospectively. In addition, the KPIs for employees, occupational health and safety and environmental protection for the year 2012 were retrospectively adjusted to account for the effects of the acquisition of the US homecare company Lincare.

VOC (volatile organic compounds)Geprüft von KPMG

 

598

 

657

 

92

 

109

NH3 (ammonia)2 Geprüft von KPMG

 

73

 

165

 

12

 

11

CO (carbon monoxide)Geprüft von KPMG

 

3,213

 

3,325

 

2,177

 

2,895

NOx (nitrogen oxides)Geprüft von KPMG

 

6,443

 

6,762

 

6,273

 

5,556

SOx (sulphur oxides)Geprüft von KPMG

 

570

 

447

 

122

 

391