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[melake daniel]

Atmospheric distillation units are mainly used in refineries for the separation of the crude oil in to different light fractions like gas, LPG, gasoline, naphtha and heavy atmospheris residue then what is the general mass and energy balance for most ADU?

Edited by melake daniel, 14 December 2010 - 09:41 AM.

[Zauberberg]

Crude Assay is the document which tells you how much of each fraction (i.e. C2-, LPG, Naphtha, Kerosene, Gas Oil, and Light Residue) is contained in any of the particular Crude oil, depending on its origin. Crude assay provides an exhaustive information required for design of CDU (ADU/VDU), and it also gives you the information about basic material balance.

http://www.totsa.com...ssays.php?rub=1
http://www.exxonmobi..._oil/index.html
http://www.bp.com/pr...ntentId=7020300
http://www.statoil.c...es/default.aspx

As for the energy balance (internal + utilities), the best approach would be to obtain actual plant data from some of the refineries around. If that is not possible, try Google-ing around as there is a lot of information available. For example, see the example for several units in this paper, pages 18 onwards:

http://ies.lbl.gov/i...mrefineries.pdf