Evaluation of Applicability of Magnesium-Based CO2 Capture Specimens Derived from Brine

Junhyeon Cho; Kyungha Kang; Hongseok Jang

doi:10.7844/kirr.2025.34.5.101

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2025 Vol.34, Issue 5 Preview Page

Research Paper

Evaluation of Applicability of Magnesium-Based CO₂ Capture Specimens Derived from Brine 간수에서 회수한 마그네슘을 활용한 이산화탄소 포집체로서의 적용성 평가

31 October 2025. pp. 101-108

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Abstract

In this study, a CO₂-sequestering specimen was fabricated and evaluated based on MgO obtained from the recovery and calcination of magnesium from brine using a pH swing method. Brucite ore was used as the control. MgO was synthesized through calcination at 500 °C. The reactivity of the synthesized MgO was measured using acetic acid and citric acid methods and exhibited reaction times of 12, 24, 75, and 183s, indicating high reactivity. Subsequently, accelerated carbonation curing was performed using sodium bicarbonate as a carbonation accelerator. X-ray diffraction and Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analyses of the cured specimens revealed the formation of magnesium carbonate phases in the specimens with sodium bicarbonate, which were absent in the specimens without sodium bicarbonate. Moreover, weight loss increased in the approximate range of 300-500°C, confirming enhanced CO₂ sequestration. These results are expected to serve as fundamental data for the resource utilization of bitterns and desalination brines in future applications.

Keywords

Brine

Carbon dioxide capture

Magnesium recovery

Brucite

Sodium bicarbonate

본 연구에서는 간수에서 pH swing 법을 활용하여 마그네슘을 회수하고 이를 소성하여 얻은 산화마그네슘을 기반으로한 이산화탄소 포집형 시험체를 제작 및 평가하였다. 브루사이트 광석을 대조군으로 선정하고 간수에서 얻은 수산화마그네슘과 500 ℃로 소성하여 산화마그네슘을 합성하였다. 수득한 산화마그네슘의 반응성 시험을 아세트산과 시트르산을 활용하여 측정하였으며 각각 12초, 24초, 75초, 183초가 소요되어 높은 반응성을 갖는 것으로 나타났다. 이후, 탄산 촉진제인 중탄산나트륨을 혼입하여 촉진 탄산화 양생을 수행하였다. 양생이 완료된 시험체를 XRD, SDT 분석을 수행하였으며 탄산 촉진제가 첨가되지 않은 시험체에 비해 탄산 촉진제가 첨가된 시험체에서 탄산마그네슘 결합체의 결정을 확인하였고, 300-500 ℃ 구간의 중량감소율이 증대되어 이산화탄소 포집이 개선된 것을 확인하였다. 향후, 간수 및 해수담수화 폐수의 자원화 과정의 기초 자료로 활용될 것으로 기대된다.

키워드

간수

이산화탄소 포집

마그네슘 회수

브루사이트

중탄산나트륨

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 34
No :5
Pages :101-108
Received Date : 2025-09-11
Revised Date : 2025-09-25
Accepted Date : 2025-09-30
DOI :https://doi.org/10.7844/kirr.2025.34.5.101

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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