Article: Investigating mineral carbonation dynamics by variable CO2 injection in Bera sandstone and Tapah limestone under controlled weathering Journal: International Journal of Petroleum Engineering (IJPE) 2024 Vol.4 No.2 pp.106 - 132 Abstract: This study investigates mineral carbonation mechanisms for climate change mitigation by varying CO2 injection rates into Malaysia's Tapah limestone and Bera sandstone at 80°C and atmospheric pressure. Rock samples were characterised using X-ray diffraction (XRD), scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS), and atomic absorption spectroscopy (AAS) pre- and post-CO2 injection. AAS assessed changes in Ca, Mg, and K concentrations, while pH analysis revealed CO2-induced acidification effects on mineral solubility. Tapah limestone synthesised calcite peaks post-injection, while Bera sandstone displayed calcite peaks, indicating mineral transformations. Bera sandstone initially decreased Ca and Mg concentrations with rising CO2 injection, and then increased after equilibration, while K concentrations initially rose, then declined. SEM-EDS analyses documented mineral transformations, aligning with XRD and AAS results. The study underscores that lower injection rates foster more extensive mineralisation reactions, pivotal for effective climate change mitigation through mineral carbonation. Inderscience Publishers - linking academia, business and industry through research

Title: Investigating mineral carbonation dynamics by variable CO₂ injection in Bera sandstone and Tapah limestone under controlled weathering

Authors: Mansoor Zoveidavianpoor; Madjid Jalilavi; Rahmat Mohsin

Addresses: Petroleum Engineering Department, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia; Malaysia Petroleum Resources Corporation (UTM-MPRC), Institute for Oil and Gas (IFOG), Universiti Teknologi Malaysia, Johor 81310, Malaysia ' National Iranian Oil Company, Iranian Central Oil Fields Company, No. 390, Tehran, Iran ' Malaysia Petroleum Resources Corporation (UTM-MPRC), Institute for Oil and Gas (IFOG), Universiti Teknologi Malaysia, Johor 81310, Malaysia

Abstract: This study investigates mineral carbonation mechanisms for climate change mitigation by varying CO₂ injection rates into Malaysia's Tapah limestone and Bera sandstone at 80°C and atmospheric pressure. Rock samples were characterised using X-ray diffraction (XRD), scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS), and atomic absorption spectroscopy (AAS) pre- and post-CO₂ injection. AAS assessed changes in Ca, Mg, and K concentrations, while pH analysis revealed CO₂-induced acidification effects on mineral solubility. Tapah limestone synthesised calcite peaks post-injection, while Bera sandstone displayed calcite peaks, indicating mineral transformations. Bera sandstone initially decreased Ca and Mg concentrations with rising CO₂ injection, and then increased after equilibration, while K concentrations initially rose, then declined. SEM-EDS analyses documented mineral transformations, aligning with XRD and AAS results. The study underscores that lower injection rates foster more extensive mineralisation reactions, pivotal for effective climate change mitigation through mineral carbonation.

Keywords: mineral carbonation; controlled weathering; carbon storage; limestone; sandstone.

DOI: 10.1504/IJPE.2024.142138

International Journal of Petroleum Engineering, 2024 Vol.4 No.2, pp.106 - 132

Received: 24 Jan 2024
Accepted: 16 Feb 2024
Published online: 08 Oct 2024 *

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Title: Investigating mineral carbonation dynamics by variable CO2 injection in Bera sandstone and Tapah limestone under controlled weathering

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Title: Investigating mineral carbonation dynamics by variable CO₂ injection in Bera sandstone and Tapah limestone under controlled weathering