TY - JOUR
T1 - Exploration of the Mechanism of Acid Tailing on Strong-Base Ion Exchangers
T2 - Modeling and Experiment
AU - Kou, Jingwei
AU - Chen, Chen
AU - Zhang, Jing
AU - Xiang, Houle
AU - Guo, Han
AU - Li, Dan
AU - Wang, Hui
AU - Zhang, Jihang
AU - Yang, Pengpeng
AU - Zhuang, Wei
AU - Ying, Hanjie
AU - Wu, Jinglan
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/10/18
Y1 - 2023/10/18
N2 - A new DTSD-S model (combining the ion-exclusion chromatography-Donnan model and two-step dissociation of sulfuric acid) was developed herein to predict CP,SO42- and CP,HSO4- in the resin pores during the adsorption and desorption processes. A comparison of CP,SO42- and CP,HSO4- during the desorption process showed that the tailing phenomenon was affected by the acid concentration. When CH+ was lower than 0.9 mol/L, the predominant species in the resin pores was SO42- instead of HSO4-, which verified that the sulfuric acid tailing was caused by SO42-. The results of energy-dispersive spectroscopy and X-ray photoelectron spectroscopy of the resins after adsorption showed the existence of extra S element, which further verified that the existence of SO42- was the main factor that caused the acid tailing. Finally, we concluded that the acid tailing was inevitable and suggested that one could recover a high H2SO4 concentration by using a high feed acid concentration.
AB - A new DTSD-S model (combining the ion-exclusion chromatography-Donnan model and two-step dissociation of sulfuric acid) was developed herein to predict CP,SO42- and CP,HSO4- in the resin pores during the adsorption and desorption processes. A comparison of CP,SO42- and CP,HSO4- during the desorption process showed that the tailing phenomenon was affected by the acid concentration. When CH+ was lower than 0.9 mol/L, the predominant species in the resin pores was SO42- instead of HSO4-, which verified that the sulfuric acid tailing was caused by SO42-. The results of energy-dispersive spectroscopy and X-ray photoelectron spectroscopy of the resins after adsorption showed the existence of extra S element, which further verified that the existence of SO42- was the main factor that caused the acid tailing. Finally, we concluded that the acid tailing was inevitable and suggested that one could recover a high H2SO4 concentration by using a high feed acid concentration.
UR - http://www.scopus.com/inward/record.url?scp=85176004987&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.3c02467
DO - 10.1021/acs.iecr.3c02467
M3 - 文章
AN - SCOPUS:85176004987
SN - 0888-5885
VL - 62
SP - 16875
EP - 16885
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 41
ER -