Effective pervaporation dehydration of acrylic acid using alginate/BaTiO3 and alginate/TiO2 mixed matrix membranes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00618137" target="_blank" >RIV/67985858:_____/25:00618137 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1383586624045970?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586624045970?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2024.130858" target="_blank" >10.1016/j.seppur.2024.130858</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effective pervaporation dehydration of acrylic acid using alginate/BaTiO3 and alginate/TiO2 mixed matrix membranes

Popis výsledku v původním jazyce

To develop an efficient pervaporation technique for acrylic acid dehydration, four types of BaTiO3 and TiO2 particles with various shapes and structures (commercial solid TiO2-S, synthesized sea urchin-like TiO2-U, commercial solid BaTiO3-S, and synthesized porous BaTiO3-P) were incorporated into sodium alginate (NaAlg) to fabricate mixed matrix membranes (MMMs) for comparison. 18 h crosslinking with CaCl2 was conducted to improve the acid-resistant property of Alg-based membrane. The filler particles and MMMs were systematically characterized via SEM, FTIR, BET, XRD, AFM, EDX, and TGA. The hydrophilicities of MMMs were enhanced with increasing filler contents, evidenced by the decreased water contact angles and raised water swelling degrees. When applied to pervaporate 5 wt% water/acrylic acid solution at 25 ℃, the MMMs significantly improved total permeation fluxes and separation factors compared to the pristine Alg membrane. When TiO2 particles were incorporated, the Alg/TiO2-U MMMs obtained lower separation factors than the Alg/TiO2-S MMMs due to the increased acrylic acid transport through big nanorod gaps and interfacial voids formed by the sea urchin-like TiO2-U shapes. On the other hand, the Alg/BaTiO3-P MMMs were superior to the Alg/BaTiO3-S MMMs in the dehydration performance, which was attributed to their porous structures. The optimal separation efficiency occurred at Alg/2 % BaTiO3-P MMM (water purity of 99.8 wt% and separation factor of 8700) with a stable performance over 168 h. When the optimal filler content was exceeded, the separation factor would decrease owing to the extra voids resulted from particle agglomeration. Moreover, the pervaporation performance could be enhanced with increasing feed temperature. In contrast, the separation selectivity was reduced, but the total permeation flux was improved, with increasing feed water concentration. It was further confirmed that the Alg/ 2 % BaTiO3-P MMM could successfully pervaporate a three-component mixture (10.3 wt% water/acetic acid/ acrylic acid) at 65 ℃ to produce high-purity water (98.3 wt%). In conclusion, the design of Alg/BaTiO3 and Alg/ TiO2 MMMs provides a potential approach for effective acrylic acid dehydration.

Název v anglickém jazyce

Effective pervaporation dehydration of acrylic acid using alginate/BaTiO3 and alginate/TiO2 mixed matrix membranes

Popis výsledku anglicky

To develop an efficient pervaporation technique for acrylic acid dehydration, four types of BaTiO3 and TiO2 particles with various shapes and structures (commercial solid TiO2-S, synthesized sea urchin-like TiO2-U, commercial solid BaTiO3-S, and synthesized porous BaTiO3-P) were incorporated into sodium alginate (NaAlg) to fabricate mixed matrix membranes (MMMs) for comparison. 18 h crosslinking with CaCl2 was conducted to improve the acid-resistant property of Alg-based membrane. The filler particles and MMMs were systematically characterized via SEM, FTIR, BET, XRD, AFM, EDX, and TGA. The hydrophilicities of MMMs were enhanced with increasing filler contents, evidenced by the decreased water contact angles and raised water swelling degrees. When applied to pervaporate 5 wt% water/acrylic acid solution at 25 ℃, the MMMs significantly improved total permeation fluxes and separation factors compared to the pristine Alg membrane. When TiO2 particles were incorporated, the Alg/TiO2-U MMMs obtained lower separation factors than the Alg/TiO2-S MMMs due to the increased acrylic acid transport through big nanorod gaps and interfacial voids formed by the sea urchin-like TiO2-U shapes. On the other hand, the Alg/BaTiO3-P MMMs were superior to the Alg/BaTiO3-S MMMs in the dehydration performance, which was attributed to their porous structures. The optimal separation efficiency occurred at Alg/2 % BaTiO3-P MMM (water purity of 99.8 wt% and separation factor of 8700) with a stable performance over 168 h. When the optimal filler content was exceeded, the separation factor would decrease owing to the extra voids resulted from particle agglomeration. Moreover, the pervaporation performance could be enhanced with increasing feed temperature. In contrast, the separation selectivity was reduced, but the total permeation flux was improved, with increasing feed water concentration. It was further confirmed that the Alg/ 2 % BaTiO3-P MMM could successfully pervaporate a three-component mixture (10.3 wt% water/acetic acid/ acrylic acid) at 65 ℃ to produce high-purity water (98.3 wt%). In conclusion, the design of Alg/BaTiO3 and Alg/ TiO2 MMMs provides a potential approach for effective acrylic acid dehydration.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

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

359

Číslo periodika v rámci svazku

JUN 22

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

130858

Kód UT WoS článku

001375702400001

EID výsledku v databázi Scopus

2-s2.0-85210668818