Plant Details

 The SNG facility was constructed in 1977 but has seen very little operational activity.  The SNG Facility employs the British Gas hydro gasification process to convert naptha feedstock into SNG at a design rate of 60,000 decatherms per day, and was constructed by Foster Wheeler Energy Corporation.  The principle areas of the plant that are offered for sale are as follows:

Stretford Sulfur Recovery
Section 150

 The bulk of the sulfur in the plant naptha feed is removed in the hydrodesulphurization (HDS) unit, the sweet naptha going to the SNG unit and the sulfur leaving the HDS unit as H2S in the sour gas purge. The sour gas, composed of mainly light hydrocarbons, is burnt in the plant fuel system. In order to reduce pollution of the atmosphere by combustion products to an absolute minimum, the H2S is removed from the sour gas before combustion, by the Stretford Process.
The Stretford Process was developed by the North Western Gas Board, now part of the British Gas Corporation, who license the process.  The Stretford Process for H2S removal is by continuous liquid washing using an adequate alkaline solution containing dyestuff intermediates.  The H2S+O is converted to elemental sulfur, which is separated from the solution, washed to remove the  solution from the sulfur cake, and stored ready for disposal.    The Stretford Unit that we are offering is designed to treat 78.71 lb. mol/hr of sour gas containing up to 7.34 lb. mols of H2S and to reduce the H2S content of the sweet gas to less than 1 vppm.  Alternatively, the unit can treat 148.92 lb. mols/hr of sour gas containing up to 1.84 lb. mols H2S.