Sulfur trioxide and heat decomposable sulfur trioxide precursor dehydrating agents are preferred for this purpose.

Also, a sulfur dioxide production process comprising decomposing sulfur trioxide into sulfur dioxide and oxygen by using the sulfur trioxide decomposition catalyst above, is provided.

Also, a sulfur dioxide production process comprising decomposing sulfur trioxide into sulfur dioxide and oxygen by using the sulfur trioxide decomposition catalyst above, is provided.

The generation system and process operate to provide sulfur trioxide calibration gas for calibrating sulfur trioxide detection devices.

To provide a sulfur trioxide decomposition catalyst, particularly, a sulfur trioxide decomposition catalyst capable of lowering the temperature required when producing hydrogen by an S-I cycle process.

Usually, oleum is used as the source for sulfur trioxide.

The compounds are obtained by sulfation of oxidised regenerated cellulose with sulfur trioxide.

In further parts of the installation the resulting sulphur trioxide is converted to sulphuric acid.

These radicals combine with sulfur trioxide to form methyl-sulfonate radicals.

These included using sulfur, which was burned, producing sulfur dioxide and sulfur trioxide.

The invention concerns sulfonating or sulfating organic liquid with sulfur trioxide gas.

The dehydrating stream preferably consists of sulfur trioxide dissolved in sulfuric acid.

The sulphur trioxide and further oxygen is passed via eductor (46) to the oxidation station (29).

Let us find out the standard reaction enthalpy for the formation of Sulphur Trioxide gas from Sulphur.

Remaining sulphur dioxide and oxygen is passed to heat recovery steam generator (44) wherein sulphur trioxide is formed.