SajGas will build, own, and operate the gas sweetening and sulphur recovery facilities, the primary operations of which will involve the sweetening of feed gas by extracting hydrogen sulphide and removing carbon dioxide and production of sulphur pastilles. The construction and commissioning of the plant is scheduled to be completed by the fourth quarter of 2005, with gas sweetening operations from the first quarter of 2006.

Gas Throughput Arrangements
The raw input gas will be transported through a new 30" offshore and onshore pipeline over a distance of 85 km from a new riser platform close to Crescent’s existing offshore facilities to Hamriyah, and then on to Sajaa for gas sweetening by SajGas.

The Plant
SajGas plant is being located in the Sajaa area of the Emirate of Sharjah.

The SajGas plant is being constructed under a fixed price EPC contract by Petrofac International Limited. The plant construction commenced in May 2004 and is scheduled to be completed in the fourth quarter of 2005 with operations targeted in the first quarter of 2006.

Gas Inlet Reception Facilities
The incoming 30" Onshore Pipeline terminates at a Pig Receiver and Slug Catcher. The Slug Catcher separates any liquids formed in the pipeline, although under normal operations no liquids are expected. The feed gas is then sent to the amine treatment facility within the SajGas plant.

The SajGas Plant

Amine Sweetening Facilities
The feed gas is processed through an Amine (MDEA) contactor where hydrogen sulphide and some of the carbon dioxide are removed. The amine unit will have 2 x 300 MMscfpd capacity parallel trains, designed to reduce the hydrogen sulphide content to 4 ppm or less, in line with industry practices. The resultant sweet gas is then measured. The amine stream, carrying the hydrogen sulphide and carbon dioxide, is stripped to regenerate an acid rich gas stream for recovery of the elemental sulphur. The regenerated amine is then treated via high-level filtration, with make-up of fresh amine as necessary, and recycled back to the contactor.

Sulphur Recovery Facilities
The acid rich gas stream is passed to the Sulphur Recovery Unit, designed for a total capacity of 350 tons per day of elemental sulphur. This is a Claus Unit where the gas stream is burned under carefully controlled conditions, prior to passing over a reduction catalyst where the elemental sulphur is formed. The sulphur is then condensed, whilst simultaneously generating steam, and runs down into a liquid sulphur storage pit. In the pit the sulphur is stripped to ensure that all remaining hydrogen sulphide (to the required environmental standards of less than 10 ppm) is removed.

Sulphur Forming and Handling Facilities
The extracted pure liquid sulphur is pumped from the degassing/storage pit to three trains of high-grade pastillators. Each train is capable of processing 120 tons per day of liquid sulphur, giving an overall output capacity of 360 tons per day. In these units the sulphur is sprayed onto special water chilled belts where it instantaneously solidifies into pastilles of high strength and uniform size, essentially free from dust. These are transported into four elevated concrete storage silos, from where they are gravity loaded via vibrating chutes into road vehicles for onward sale and export.

Utilities and Power Generation
The SajGas plant is self contained for its requirement of power, water, steam generation and other utilities.