Graymont is dedicated to producing lime with the lowest carbon dioxide emissions in the North American industry.
While total carbon dioxide (CO2) emissions resulting from the production of lime are relatively small compared to overall emissions, lime production is an emissions-intensive process. The emissions result from two separate aspects of production: the chemical transformation (calcination) of limestone; and the combustion of fuel used in the process, typically coal or petroleum coke.
Although emissions resulting from the calcination process are essentially unavoidable, Graymont is focused on reducing combustion-related CO2 emissions, which account for approximately 40% of the total. By the end of 2012, we had succeeded in reducing fuel-related emission intensity by 15% from 2004 levels. Based on 2012 production volumes, this represents an annual reduction of 359,000 tonnes of greenhouse gas (GHG) emissions compared to the volumes that would have been emitted if production had continued at 2004 intensity levels.
Graymont understands that climate change and GHG emissions are a concern, and we are committed to continuous improvement in this critical area.
In 2012, Graymont facilities emitted approximately 3,000 tonnes of oxides of sulphur (SOx). But in that same year, Graymont products prevented the emission of approximately 362,000 tonnes of SOx from facilities in other industries.