Microsoft Word master thesis report fina doc

4.5.3. Catalysts sulfurization in the second reactor of gasoline hydrogenation unit 
In the gasoline hydrogenation unit, metals of catalysts in the second reactor are in oxide form. 
They must undergo a treatment to recover the active sulphide form. The operation consists in 
sweeping the catalyst with a hydrogen steam which contains enough sulfiding agent to 
sulfurize catalysts. 
Sulfurization 
Gas components 
(%mol) 
H
2
+ DMDS 
(dimethyldisulfide) 
Flowrate (1) 
Notice Presence 
of 
H
2
O, H
2
S 
Destination Flare 
Table B-4-7: Gaseous effluent during catalyst sulfurization in GHU 
4.6. Effluents characterization
In this part, each effluent (except products from the process) is the most precisely as possible 
characterized with data available.

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4.6.1. Normal operations 
 
Fugitive emissions 
 
Media 
Gas 
Origin 
Valves, pump seals, flanges, open-ended valves, relief valves, 
compressor seals, drains, sample connections.
Destination 
Diffuse in the atmosphere 
Quantity 
Can be estimated with the Average Factor Method
Composition 
VOCs 
 
Fugitive emissions are not negligible. They can be estimated thanks to the Average Factor 
Method which is explained in the part A of this report.
Gas relieves 
 
Media 
Gas 
Origin 
Relief valves 
Destination 
Flare 
Quantity 
? 
Composition 
CO
2
, VOCs, CO, SOx, NOx
 
Off-gas 
 
Media 
Gas 
Origin 
Recycle drums