DHDS BPCL

I want to get details of Diesel Hydrodesulphurisation (DHDS) Unit of Bharat Petroleum Corporation Limited BPCL?

The Diesel Hydrodesulphurisation (DHDS) Unit converts this sulphur in the presence of Hydrogen (H2) to H2S so that sulphur level in HSD is reduced to less than 100 ppm.

Diesel Hydrodesulphurisation (DHDS) Unit

High Speed Diesel (HSD) contains contaminants like organic sulphur, nitrogen and metal compounds which contribute to increased levels of air pollution, equipment corrosion etc.

The unit utilizes a fixed bed catalyst process to upgrade the quality of petroleum distillate fractions by decomposing the contaminants with a negligible effect on the boiling range of the feed.

The hydrogen required for this purpose is obtained by Steam Naphtha reforming.

The hydrogen unit utilizes either Light Naphtha or High Aromatic Naphtha as feedstock.

The raw feedstock utilized to generate hydrogen is first desulphurised in the Final Desulphurisation Unit (FDS) to sulphur level of less then 0.05 ppm.

The sweet feed (free of sulphur) is then Prereformed to convert higher hydrocarbon to methane. The methane rich feed is then reformed.

The hydrogen obtained by reforming is around 70 % pure.

The Pressure Swing Adsorption (PSA) Unit further enhances the purity of hydrogen to 99.99 % volume.

H2S gas from DHDS is treated with Amine to enrich it and then the H2S rich gas is treated in Sulphur Recovery Unit (SRU) to obtain Sulphur as a by-product.

The sulphur is obtained by Clauss process.

The acid gas from the Clauss reactor is treated in Maximum Clauss Recovery Concept (MCRC) unit to recover Sulphur to the maximum possible extend.

Contact-

Bharat Petroleum Corporation Ltd.
Bharat Bhavan-1, 4 and 6 Currimbhoy Road Ballard Estate, Mumbai-400074
022-22713261

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Answered By StudyChaCha Member