Air emissions

Emissions to air

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), nitrogen oxides (NOX) and ammonia (NH3). 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. In 2014, we embarked on a central analysis of our calculations of emissions to air. The aim of this analysis is to enhance our overview of the global impact of our business operations on the environment and to use it as a basis from which we can devise additional measures to reduce our environmental impact.

We are cooperating with our customers and other partners to develop solutions which will reduce emissions to air. Linde’s LoTOx™ technology installed on our customers’ sites is being used to separate nitrogen oxides from waste gases arising from combustion processes. The LoTOx™ systems, which have so far been installed mainly in plants in the United States and in China, are preventing more than 15,000 tonnes of NOX per annum being emitted into the air. In 2014, we licensed an American company to sell this technology to power station operators in the United States.

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Emissions to air1 (in tonnes)

 

 

 

 

 

 

 

 

 

 

 

2014

 

2013

 

2012

 

2011

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

An exceptional event in South America led to additional ammonia emissions of around 146 tonnes.

As a result of the first-time 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

 

657

 

92

 

109

 

206

NH3 (ammonia)2 Geprüft von KPMG

 

17

 

12

 

11

 

28

CO (carbon monoxide) Geprüft von KPMG

 

3,325

 

2,177

 

2,895

 

1,566

NOx (nitrogen oxides) Geprüft von KPMG

 

6,762

 

6,273

 

5,556

 

1,070

SOx (sulphur oxides) Geprüft von KPMG

 

447

 

122

 

391

 

543