May 27 2016
3 min read
Olivier Ducreux: Adsorption is a physical phenomenon that takes place on the surface of a solid called an adsorbent. It enables the removal of trace contaminants from gas and liquid streams. Adsorbents have many applications, such as drying (H2O molecule removal) or purification of air, gases (mercury removal for instance) and liquids. They play a major role in the industry, helping operators upgrade the quality of their production, minimize pollution or corrosion issues.
Christophe Nedez: Led by Chevron Australia with important co-stakeholders (Shell, ExxonMobil and several Japanese natural gas companies), the Gorgon project is a major three trains Liquefied Natural Gas (LNG) project. With a capacity of more than 15 million tons of LNG per year, it is one of the world’s largest natural gas projects.
Gorgon’s key mercury removal sections were awarded to Axens, which delivered AxTrap™ 200 adsorbents with a unique formula including metal sulfide on alumina carriers. These adsorbents can be loaded under atmospheric air and are non-self-heating.
During operation, mercury (in light blue) is irreversibly attached to the metal sulfide (in red), which is strongly linked to the alumina surface via a chemical reaction. Picture: IFP Energies nouvelles
The respect of specific quarantine requirements of Barrow Island fixed by the North West Australia authorities was an additional challenge!