TY - JOUR
T1 - Recovery of acetate by anion exchange with consecutive CO2-expanded methanol desorption
T2 - A model-based approach
AU - Cabrera-Rodríguez, Carlos I.
AU - Cartin-Caballero, Carlos M.
AU - Platarou, Evgenia
AU - de Weerd, Florence A.
AU - van der Wielen, Luuk A.M.
AU - Straathof, Adrie J.J.
N1 - Publisher Copyright:
© 2018 The Authors
PY - 2018/9/12
Y1 - 2018/9/12
N2 - 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- Ac- =0.125, KCl- HCO3 - =0.206 and KOV,HAc=0.674[Formula presented], and for the desorption pKMeCO3 - Ac- =3.71. 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.
AB - 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- Ac- =0.125, KCl- HCO3 - =0.206 and KOV,HAc=0.674[Formula presented], and for the desorption pKMeCO3 - Ac- =3.71. 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.
KW - Acetate
KW - Anion exchange
KW - CO-expanded methanol
KW - Desorption
KW - Ion exchange modeling
UR - http://www.scopus.com/inward/record.url?scp=85045458977&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2018.03.068
DO - 10.1016/j.seppur.2018.03.068
M3 - Article
AN - SCOPUS:85045458977
SN - 1383-5866
VL - 203
SP - 56
EP - 65
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -