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Energy Consumption and Net CO2 Sequestra

Wouter J.J. Huijgen, Gerrit Jan Ruijg

2026enCO2 sequestrationmineral carbonationprocess watersteel slagwollastoniteenergy efficiency

Abstract

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The rising levels of atmospheric CO2 have heightened interest in effective sequestration methods. This study aimed to evaluate the energetic efficiency of CO2 sequestration via aqueous mineral carbonation, specifically focusing on the influence of process water recycling on carbonation effectiveness. We conducted a series of carbonation experiments employing a systematic recycling of process water to assess its effects on CO2 sequestration efficiency using two feedstocks: wollastonite and steel slag. The analyses utilized ICP-AES and ion-chromatography to ascertain the composition of the process water after each carbonation cycle. Results indicated that while most elements did not inhibit water recycling, certain elements in steel slag, like Cl and S, might complicate recycling due to potential added costs related to corrosion and wastewater treatment. Notably, wollastonite demonstrated a higher energetic CO2 sequestration efficiency compared to olivine under milder process conditions. These insights underline the importance of process water management in optimizing CO2 sequestration methods and suggest further exploration of continuous carbonation processes at pilot-scale to enhance efficiency and economic viability.

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Cite This Work

@article{af8d43e7-9623-44bc-94dd-30d7f2ee59d3,
  title={Energy Consumption and Net CO2 Sequestra},
  author={Wouter J.J. Huijgen and Gerrit Jan Ruijg},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Energy Consumption and Net CO2 Sequestra
AU  - Wouter J.J. Huijgen
AU  - Gerrit Jan Ruijg
PY  - 2026
LA  - en
ER  -

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