hydrogenator in hydrogen unit
hydrogenator in hydrogen unit
(OP)
dear all,
i have a question.
the hydrogenator in hydrodesulkphurization section of hydrogen generation unit has CoMo bed for conversion of organic sulphor in to H2S.licensor says its'temperature should not increase beyond 400 deg c or else it will render the catalyst inactive due to sintering.
what is the normal practice if organic sulphor slippage is observed in the outlet of hydrogenator,does the increase in the inlet temperature of it will help anything like we do in other hydrotreaters to counter the deactivation of the catalyst?
regards,
santosh
RE: hydrogenator in hydrogen unit
As you know from the other beds you can get some activity from increasing temperature but it is limited. Also, in a lot of plant designs, its difficult to have much temperature control on this bed.
There is a very good reference book on Syngas plants you might find usefull. It is the "Catalyst Handbook" by Twigg. Its out of print but used copies can be found on the net.
RE: hydrogenator in hydrogen unit
RE: hydrogenator in hydrogen unit
1- Increase the inlet temperature as long as temperature is less than 400°C, at outlet.
2- replace catalyst(if you cannot regenerate it).You need to have some minimum sulfur to keep the catalyst active for HDS, check with catalyst manufacturer for how much S is needed, usually 2 ppm or so...
By the way how will you chack organic chloride slippage at HDS reactor outlet? you would need special sampling system for it..
Don't you have ZnO beds downstream of HDS reactor?
The Reformer catalyst will get poisoned if Sulfur slips...
RE: hydrogenator in hydrogen unit
we have closed sampling system fo taking the sample.what specific sampling are you talking about?
santosh