Using bipolar electrodialysis to recover sodium hydroxide from black liquor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F25%3AN0000014" target="_blank" >RIV/28676092:_____/25:N0000014 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S1383586625045101" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S1383586625045101</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2025.135913" target="_blank" >10.1016/j.seppur.2025.135913</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Using bipolar electrodialysis to recover sodium hydroxide from black liquor

Popis výsledku v původním jazyce

An investigation was conducted on the possibility of bipolar membrane electrodialysis (EDBM) that employed heterogeneous membranes to recover NaOH from alkaline black liquor. An anodizing plant’s aluminum leaching produced the liquor, which contained 45.3 g/kg OH⁻ as sodium hydroxide and had been contaminated by 23.6 g/kg Al³⁺ and 55.2 g/kg CO₃²⁻ ions. Due to the very high concentrations of Al3+, EDBM was performed under alkaline conditions in all circuits to prevent aluminum hydroxide precipitation and clogging of the membrane stack. Using the newly introduced concept of a “pseudo acidic circuit”, neither clogging of the membrane stack nor precipitation of dissolved aluminum was observed within the stack. Around 87 % of NaOH was recovered from black liquor, with a high sodium hydroxide solution purity that made it suitable for reuse in aluminum surface treatment. No clogging of the membrane stack or precipitation of dissolved aluminum was observed on the used membranes.

Název v anglickém jazyce

Using bipolar electrodialysis to recover sodium hydroxide from black liquor

Popis výsledku anglicky

An investigation was conducted on the possibility of bipolar membrane electrodialysis (EDBM) that employed heterogeneous membranes to recover NaOH from alkaline black liquor. An anodizing plant’s aluminum leaching produced the liquor, which contained 45.3 g/kg OH⁻ as sodium hydroxide and had been contaminated by 23.6 g/kg Al³⁺ and 55.2 g/kg CO₃²⁻ ions. Due to the very high concentrations of Al3+, EDBM was performed under alkaline conditions in all circuits to prevent aluminum hydroxide precipitation and clogging of the membrane stack. Using the newly introduced concept of a “pseudo acidic circuit”, neither clogging of the membrane stack nor precipitation of dissolved aluminum was observed within the stack. Around 87 % of NaOH was recovered from black liquor, with a high sodium hydroxide solution purity that made it suitable for reuse in aluminum surface treatment. No clogging of the membrane stack or precipitation of dissolved aluminum was observed on the used membranes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

1873-3794

Svazek periodika

382

Číslo periodika v rámci svazku

135913

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

001614990300004

EID výsledku v databázi Scopus

2-s2.0-105021846931