Glass Industry

Efficient cleaning of acid gases

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Sodium bicarbonate BICAR® is highly effective in removing sulfur dioxide, the main pollutant in glass furnaces, at any temperature above 140°C. 

The residual sodium chemicals from the air emission control process are mainly consisting of sodium sulfate and can be generally directly recycled in the process, thus saving raw materials and eliminating waste products.

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We can distinguish several types of glass, essentially flat, container and special glass. Glass is produced by melting a mixture of sand, sodium carbonate, and additives, mainly sodium sulfate. 

The manufacturing of sodocalcic glass generates some dust and acid components, mainly sulfur dioxide coming both from the sulfur content of the fuels and from the decomposition of refining agents.


The SOLVAir® Solution: sodium bicarbonate for flue gas cleaning and on-site recycling

Sodium bicarbonate BICAR® neutralizes the acid components of polluted gases according to the legal emission limits. 

BICAR® is highly effective in precipitating sulfur dioxide (SO2) and hydrofluoric acid (HF). 

The salt formed by this reaction has to be separated from the flue gas by an electrostatic precipitator or a bag filter, depending on the required mitigation performance and the temperature of the gases. 

Using sodium bicarbonate BICAR®, the residual sodium chemicals from the purification, consisting essentially of sodium sulfate, can be generally recycled in the melting furnace, thereby refining the raw glassmaking materials. 

BICAR® is used by major glass manufacturers throughout Europe.