Rights accessRestricted access - confidentiality agreement
At present, one of the most used methods for removing CO2 from gaseous streams is
absorption into aqueous solutions of alkanolamines. In this process, the gas stream is
brought into contact with an aqueous solution of alkanolamines in an absorption tower
where CO2 absorption is realized. This reaction produces carbamate and protonated
amine. In a desorber, the reaction is reversed and CO2 is produced as a pure gas and the
amine solution regenerated.
Modelling of the mass transfer in the contactors is important for the understanding,
scale-up and optimization of these processes. This is a combined multicomponent
diffusion reaction problem in its simplest case, complicated by convective transport of
water. Also diffusivity varies through the reaction zone, which also must be taken into
Solving the system of differential equations resulting from the modelling must be
numerical as an analytical solution does not exist. The space resolution in the reaction
domain must be very good and this puts severe demands on the discretization routines
to be used.
In this work, the various discretization methods, uniform grids, split uniform grids, nonuniform
grids, and finally adaptive grids are studied. One of the methods studied is the
method of lines techniques. For the adaptive methods also the methods of lines can be
used in addition to the method of Bloom and Zegeling.
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder. If you wish to make any use of the work not provided for in the law, please contact: email@example.com