2 replies to this topic

[Egunjobi]

pls help me with the design equations and considerations with economic analysis for reactive absorbers and the design guide online for this type absorber

[siretb]

A similar topic is covered in a reply, to a post, dated March 4, 2004 "scrubber design", in the "profes. forum" of this site.
For the basic equations, you could refer to Perry's handbook.
From a technical standpoint an absorber with chemical reaction differs from a regular absorber only by the fact that a chemical reaction will remove the absorbed product, thus pulling the process. A significant issue is the thermal effect, very often reactions involved are exothermic.
For the economics, use common sense. There will be a trade off between the operating costs (reagents, pumping power, fan power, discharge of bleed, ....) and the investment costs (diameter, height of absorber, technology, ...). If the reaction is slow, one may even consider trays with a high holdup, but in many a case a packed tower is the best choice.