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Contenuto archiviato il 2022-12-27

LIQUID SOLVENT EXTRACTION PILOT PLANT [PHASE 2A]

Obiettivo

The overall project aim is to design, construct and operate a pilot industrial plant for the evaluation of British Coal's Liquid Solvent Extraction Process, producing transport fuels from coal.L%

British Coal is developing a two-stage coal liquefaction process. Coal is dissolved in a process derived solvent, insolubles ( including mineral matter) are filtered out and the resulting coal solution is hydrocracked and then fractionated to yield products and recycle solvent.
The objectives of the Project are to:
- demonstrate the process under continuous full recycle operation, determine operational flexibilities and establish the operating envelope.
- identify and solve effluent disposal problems.
- produce tonnage quantities of light to medium oils for testing.
The plant design allows for variations in certain key parameters to allow the investigation and proving of the technical and technological feasibility of the process. In the process, coal is dried, pulverised and slurried with a hydrogen donor solvent (a mixture of aromatic hydrocarbons) produced within the process, pressurised to 24 bar and preheated to 410 deg. C. The slurry is fed to a digester, where 90 % of the coal dissolves, cooled to 300 deg. C and depressurised to 2 bar to remove light liquids and gases. Undissolved coal and mineral matter is filtered out, and the filter cake is washed with solvent and vacuum dried. The coal solution is pressurised to 210 bar, heated to 420 deg. C and hydrocracked in two reactors arranged in series with hydrogen injection facilities to cool the reactants. Liquids leaving the hydrocracker are fractionated to give three main liquid products, in the ranges;
- C5 - 250 deg. C (light distillate)
- 250 deg. C - 460 deg. C (basis for recycle solvent)
- pitch (nominally + 460 deg. C)
The pitch may be fed to a delayed coker, to provide an analogue of one configuration of a commercial plant, producing coke and additional solvent, light distillate and gases.
The total project is expected to take approximately 7 years to complete, terminating in 1991, at an overall cost of UKL 34 million. The UK Department of Energy and Ruhrkohle AG are participating in the project. Participation by other organisations could be accommodated.

Invito a presentare proposte

Data not available

Meccanismo di finanziamento

DEM - Demonstration contracts

Coordinatore

BRITISH COAL CORPORATION (RESEARCH ESTABLISHMENT
Contributo UE
Nessun dato
Indirizzo
COAL RESEARCH ESTABLISHMENT STOKE ORCHARD, CHELTENHAM
GL52 4RZ Gloucester
Regno Unito

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Costo totale
Nessun dato