http://purl.org/coar/resource_type/c_6501
Recovery of acetate by anion exchange with consecutive CO2-expanded methanol desorption: A model-based approach
Fecha
2018-04-07Autor
Cabrera-Rodrígueza, Carlos I.
Cartin-Caballeroa, Carlos M.
Platarou, Evgenia
de Weerd, Florence A.
van der Wielena, Luuk A.M.
Straathof, Adrie J.J.
Institución
Resumen
Production of bio-based acetate is commonly hindered by the high costs of the downstream processing. In this
paper, a model is developed to describe a new method that recovers acetate salts using anion exchange resins,
and subsequently desorbs and upgrades them using CO2-expanded alcohol. The model consists of equilibrium
parameters for both the adsorption and desorption step. The calculated parameters are: for the adsorption
− =−
KCl 0.125 Ac , − =
−
K 0.206 Cl
HCO3 and KOV HAc , = 0.674 mol / kgresin
mol / kgsolution , and for the desorption − = −
pK 3.71. MeCO
Ac
3 The
maximum experimental concentration of acetic acid obtained in CO2-expanded methanol is 0.427 mol/kg (20 g/
LMeOH) at an operating pressure of 31 bar. The model represents the expected trends for all species, and can be
used to design a multicolumn system for the recovery and upgrading of carboxylates