Agamassan

Agamassan (aga) is a porous substrate used to safely absorb acetylene and thus allow the transport, storage and commercial exploitation of an otherwise unstable gas. It was developed by Nobel Laureate Gustaf Dalén who would later invent the AGA cooker

Acetylene can readily explode when in liquid/solid form or if pressurised beyond approx 100 kPa. (Dalén was blinded in an acetylene explosion).

In 1896 French chemists Georges Claude and A. Hess discovered that acetone would dissolve large quantities of acetylene, and rendered it nonexplosive. As the liquid was reduced by consumption or cooling, explosive acetylene gas would be produced in the space above the liqiud's surface. The solution was to compress acetylene in a porous medium.

Before Dalén's work, numerous attempts were made to find a mass sufficiently elastic to withstand shock without crumbling, thus producing cavities filled with explosive acetylene gas.

Nowadays the gas is shipped and stored in metal cylinders containing acetylene, dissolved in dimethylformamide (DMF) or acetone. The casing is filled with aga, which renders it safe to transport and use.

References and further reading

 * About Gustaf Dalén