Regeneration of heat stable salts-loaded anion exchange resin by a novel zirconium pentahydroxide [Zr(OH) 5 − ] displacement technique in CO 2 absorption process

Cho, Joon-Hyung; Jeon, Soo-Bin; Yang, Kyeong-Soon; Seo, Jong-Beom; Cho, Sang-Won

doi:10.1016/j.seppur.2015.10.036

Cited by 7 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum concentrtions of the dominant anionic components in amine solvents are as follows: sulfate—500 ppm; acetate—1000 ppm; glycolate—500 ppm; oxalate—250 ppm; formate—500 ppm; chloride—500 ppm respectively [ 13 , 14 ]. The accumulation of these salts in amine solution leads to a reduction in the efficiency of the CO 2 absorption process and operational problems such as corrosion, fouling, foaming, high viscosity, capacity reduction [ 15 , 16 , 17 , 18 ]. Therefore, the removal of HSS from the amine solvent is an indispensable part of gas sweetening industries.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

et al. 2021

View full text Add to dashboard Cite

The formation of heat stable salts (HSS) during the natural gas sweetening process by amine solvent causes many problems such as corrosion, foaming, capacity reduction, and amine loss. A modeling study was carried out for the removal of HSS ions from amine solution using nanofiltration (NF) membrane process that ensures the reuse of amine solution for gas sweetening. This model studies the physics of the nanofiltration process by adjusting and investigating pore radius, the effects of membrane charge, and other membrane characteristics. In this paper, the performance of the ternary ions was investigated during the removal process from methyl di-ethanol amine solution by the nanofiltration membrane process. Correlation between feed concentration and permeate concentration, using experimental results with mathematical correlation as Ci,p = f (Ci,f) was used in modeling. The results showed that the calculated data from the model provided a good agreement with experimental results (R2 = 0.90–0.75). Also, the effect of operating conditions (including feed pressure and feed flow rate on ions rejection and recovery ratio across the flat-sheet membrane) was studied. The results showed that the recovery and rejection ratios of the NF membrane depend on the driving pressure across the membrane. While the driving pressure is affected by the feed flow conditions and feed pressure.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, it is crucial to remove them from the amine solution and increase the free amine concentration level by a continuous absorption/regeneration process. Various technologies have been used to remove HSS ions from the amine solution such as thermal reclamation, distillation, ion exchange resins, electrodialysis (ED), and nanofiltration (NF) [ 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that resin C exhibited the best removal potential for HSS. Cho et al [ 16 ] studied the enhancement of the low regeneration efficiency of HSS-loaded anion exchange resin by using a zirconium pentahydroxide displacement technique. They found that in the batch system, efficiency is 15.2% higher than conventional NaOH.…”

Section: Introductionmentioning

confidence: 99%

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

et al. 2020

View full text Add to dashboard Cite

This study presents an efficient and scalable process for removing the heat-stable salts (HSS) ions from amine solution while recovering methyl diethanolamine (MDEA) solution for its reuse in gas sweetening plants. The presence of HSS in the amine solution causes the loss of solvent capacity, foaming, fouling, and corrosion in gas sweetening units so their removal is crucial for a more well-performing process. Furthermore, the recovery of the amine solution can make the sweetening step a more sustainable process. In this study, for the first time, the removal of a multicomponent mixture of HSS from MDEA solution was investigated via a nanofiltration process using flat-sheet NF-3 membranes. The impact of operating parameters on salts and amine rejection, and flux, including the operating pressure, HSS ions concentration, and MDEA concentration in the feed solution was investigated. Results based on the nanofiltration of an amine stream with the same composition (45 wt.% MDEA solution) as that circulating in a local gas refinery (Ilam Gas refinery), demonstrated a removal efficiency of HSS ions in the range from 75 to 80% and a MDEA rejection of 0% indicating the possibility of reusing this stream in the new step of gas sweetening.

show abstract

Introduction to amine sweetening processes

2022

Corrosion in Amine Treating Units

View full text Add to dashboard Cite

Regeneration of heat stable salts-loaded anion exchange resin by a novel zirconium pentahydroxide [Zr(OH) 5 − ] displacement technique in CO 2 absorption process

Cited by 7 publications

References 25 publications

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

Modeling of Nanofiltration Process Using DSPM-DE Model for Purification of Amine Solution

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Introduction to amine sweetening processes

Contact Info

Product

Resources

About