WORLD’S LEADING SPECIALIST FOR
GAS TREATMENT SYSTEMS AND FLARING TECHNOLOGY

Countless processes produce gases and exhaust gases. Allowing emissions to escape into the air is harmful to the environment and prohibited by law in most countries. There is, however, a positive side to combustible gases. They are the modern energy carriers of today. Hofstetter offers gas technology solutions for all applications.

• H2S removal

• Siloxane removal

• Gas cooling and drying

• Filters

• Gas compression

Hydrogen sulphide is a by-product in biological processes and corrosive in the presence of water. When H2S is combusted Sulphurous and Sulphuric Acid may be formed which causes major corrosion problems in engines. Hofstetter provides solutions to reduce H2S in the gas to levels which meets the specification of the engine manufacturers. The technology applied is gas washing in vertical gas washers and adsorption.

Organic Silicon containing compounds often referred to as Siloxanes are present in landfill gas and sewage gas. These components can damage gas engines since Silicon Dioxide is formed in the combustion engine, which is very abrasive. The Hofstetter Siloxane removal system reliably removes the siloxanes by adsorption process to very low levels. Additionally this system can be designed that it removes H2S as well as Siloxanes.

The gas temperature and moisture content is conditioned to the required level by cooling and condensation of the moisture in the gas. Depending on the required conditions air fin gas coolers or chiller systems are used to cool and condense the gas. After cooling/condensation the moisture droplets are removed from the gas with moisture (droplet/mist) separators or cyclones.

Particles in the gas are removed by robust filters units. Depending on the gas quality, particles in the inlet gas and required degree of filtration, Hofstetter offers different technologies. The Hofstetter filter units are designed for easy cleaning and provide the capability to clean the filters without reducing the capacity of the full unit.