Article
Chemistry, Multidisciplinary
Melaku N. Seifu, Amanuel Bersisa, Ki-Yeon Moon, G. M. Kim, Jin-Sang Cho, Solmoi Park
Summary: This study investigates the effect of reaction and carbonation degrees on the reaction products of calcium silicate cement (CSC) during the hardening process in a high atmospheric CO2 concentration. The results show that stable C-S-H phase can form when the carbonation degree is less than one-third of the reaction degree. At higher carbonation degrees and depleted C-S-H, amorphous aluminosilicate and calcite become the main binding phases.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Construction & Building Technology
Rakibul I. Khan, Warda Ashraf, Jan Olek
Summary: This study investigated the application of amino acids in controlling CaCO3 crystallization in carbonation cured wollastonite composites. The use of amino acids resulted in the formation of stable ACC, vaterite, and aragonite, as well as enhanced flexural and compressive strength of the composites. These improvements were attributed to the reduced critical pore size and the formation of organic-inorganic hybrid phases in the matrix.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Crystallography
Ye Eun Chai, Salma Chalouati, Hugo Fantucci, Rafael M. Santos
Summary: The study evaluated the carbonation potential of two Canadian natural silicates, with wollastonite ore proving more suitable for accelerated carbonation than kimberlite tailing. The incubator and pressurized buffered slurry methods were most effective for carbonate precipitation, while unbuffered slurry reaction conditions were more akin to accelerated weathering rather than accelerated carbonation.
Article
Engineering, Chemical
Seung-Jae Mun, Sang-Jun Han, Jung-Ho Wee
Summary: This study discusses the feasibility of relatively simple CO2 mineralization as a technology for carbon capture, utilization, and storage. The process involves the carbonation of a leachate of wollastonite (CaCO3) using NaOH, resulting in the precipitation of CaCO3 as a CO2-fixed material. Despite the use of NaOH, the process permanently fixes CO2 by producing CaCO3 as a precipitate.
MINERALS ENGINEERING
(2022)
Article
Environmental Sciences
Canru Li, Xiangdong Liu, Yan Li, Yuan Jiang, Xianghui Guo, David A. Hutchins, Jian Ma, Xin Lin, Minhan Dai
Summary: This study provides experimental evidence of the interaction between phytoplankton and olivine dissolution, demonstrating that olivine dissolution promotes the growth of phytoplankton, particularly highly silicified diatoms. This has significant implications for ocean alkalinization research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Chemistry, Multidisciplinary
Linda Pastero, Alessandra Marengo, Renato Boero, Alessandro Pavese
Summary: The article introduces a new method for capturing carbon dioxide using a calcium ascorbate (vitamin C) solution, with calcium oxalate as the main reaction product. The authors successfully improved the method's performance through experimental setups and parameter optimization.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Green & Sustainable Science & Technology
Sajjad Raza, Kazem Zamanian, Sami Ullah, Yakov Kuzyakov, Inigo Virto, Jianbin Zhou
Summary: Soil plays a crucial role in the global carbon cycle, with a focus on soil organic carbon (SOC) for climate change mitigation. However, soil inorganic carbon (SIC) losses, particularly due to intensified soil acidification, are significant and pose a threat to efforts to reduce CO2 emissions through SOC sequestration.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Multidisciplinary
Gehan T. El-Bassyouni, Amira M. El-Rafei, Moenis A. Azooz, Sayed H. Kenawy, Hussein Darwish, Esmat M. A. Hamzawy
Summary: Calcium silicate/calcium hexaboride composites were prepared using the wet precipitation chemical method. After heat treatment, high quartz, calcium silicate, and calcium hexaboride were detected as phases. When soaked in SBF, the samples showed the formation of nano-sized calcium phosphate particles. The analysis confirmed the biocompatibility of the prepared composites.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Thermodynamics
Federico Cao, Dmitry Eskin, Yuri Leonenko
Summary: Carbon dioxide sequestration is an effective technology for mitigating greenhouse gas emissions, but uncertainties regarding the risks of leakage remain. Increasing underground disposal security by dissolving CO2 in brine and re-injecting it underground can prevent leaks. This technique can expand the availability of worldwide aquifers for carbon sequestration.
Article
Chemistry, Inorganic & Nuclear
Xing Liu, Bin Cheng, Jifan Hu
Summary: The study on CO2 adsorption on CaSiO3 surfaces is important for understanding carbonization mechanism and has scientific and economic significance. The research focuses on CaSiO3 (001) surfaces with CaO-termination and SiO-termination and finds that their chemical and physical properties differ from the bulk material. The analysis demonstrates that the bent modes of CO2 are energetically stable and produce carbonate when carbon and oxygen atoms react with surface oxygen and calcium atoms simultaneously. The adsorption efficiency is higher on CaO-terminated surfaces, indicating a need for surface modification to increase the proportion of CaO-terminated surfaces.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Marina Ilkaeva, Ricardo Vieira, Joao Pereira, Mariana Sardo, Ildefonso Marin-Montesinos, Luis Mafra
Summary: Solid-state NMR is used to generate CO2 adsorption isotherms, allowing the differentiation between chemi- and physisorbed components and investigation of their respective adsorption mechanisms. The proposed method is validated by comparing with volumetric measurements, and the obtained isotherm curves provide advanced analysis of the sorbents.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Hang Zhai, Qiyuan Chen, Mehmet Yilmaz, Bu Wang
Summary: This study evaluated the effect of pretreatments under different pH conditions on aqueous carbonation of alkaline earth silicate minerals. It found that NaOH pretreatment significantly enhanced carbonation, especially when followed by the removal of dissolved silica prior to carbonation. Basification offers a more promising route to accelerate aqueous carbonation without the need for costly pH swing and high-concentration/pressurized CO2.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Construction & Building Technology
Aarti Solanki, L. P. Singh, S. R. Karade, U. Sharma
Summary: The study found that silica nanoparticles (SNPs) promote the hydration of tricalcium aluminate (C3A) at the early stage of hydration, but subsequently lead to a retardation in the reaction. This retardation may be attributed to the surface coverage of C3A grains by calcium silicate hydrate (C-S-H) and calcium alumina silicate hydrate (C-A-S-H).
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Rakibul I. Khan, Muhammad Intesarul Haque, Salman Siddique, Eric N. Landis, Warda Ashraf
Summary: This article investigates the effects of amino acids on the moisture susceptibility, nanomechanical properties, and fracture properties of carbonated wollastonite composites. The addition of amino acids in a CO2-rich environment resulted in the formation of amorphous calcium carbonate (ACC), vaterite, and aragonite, instead of calcite. Various analytical techniques were used for microstructural analysis and it was observed that the chain lengths of the amino acids influenced the formation of crystal phases. The addition of amino acids reduced carbonation reaction and improved fracture properties by 156%, enhancing the nanomechanical properties of the carbonated system.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ahmed Al-Yaseri, Mujahid Ali, Ghazanfer Raza Abbasi, Hussein Rasool Abid, Nilesh Kumar Jha
Summary: This study evaluated the effect of nano-sized SiO2 on the wettability of basalt rock surface, with results showing that SiO2 nanoparticles can change the CO2-wet basalt surface to weakly water-wet, potentially enhancing CO2 trapping capacity in basalt formations with adequate porosity and permeability.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Thermodynamics
Martin Bohac, Martin Palou, Radoslav Novotny, Jiri Masilko, Frantisek Soukal, Tomas Opravil
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2017)
Article
Chemistry, Physical
Pavel Siler, Iva Kolarova, Radoslay Novotny, Jiri Masilko, Jan Bednarek, Martin Janca, Jan Koplik, Jan Hajzler, Lukas Matejka, Michal Marko, Premysl Pokorny, Tomas Opravil, Frantisek Soukal
Article
Materials Science, Multidisciplinary
Petr Hruby, Lukas Kalina, Jiri Masilko, Jaromir Porizka, Frantisek Soukal, Vlastimir Nevrly, Magdalena Kimm, Thomas Gries
MATERIALI IN TEHNOLOGIJE
(2020)
Article
Chemistry, Physical
Pavel Siler, Iva Kolarova, Radoslav Novotny, Jiri Masilko, Jan Bednarek, Martin Janca, Jan Koplik, Jan Hajzler, Lukas Matejka, Michal Marko, Jiri Svec, Martin Zlamal, Eva Kuzielova, Tomas Opravil, Frantisek Soukal
Article
Chemistry, Inorganic & Nuclear
Petr Ptacek, Frantisek Soukal, Tomas Opravil
Summary: The study found significant differences in the thermal decomposition process of low-manganese ferroan dolomite in different atmospheres, with three reactions occurring in a carbon dioxide atmosphere and the activation energy significantly higher than in other atmospheres.
SOLID STATE SCIENCES
(2021)
Article
Chemistry, Physical
Michal Marko, Petr Hruby, Martin Janca, Jakub Krikala, Jan Hajzler, Frantisek Soukal, Jan Vojtisek, Martin Dolezal
Summary: This study focuses on the impact of alkaline substances (carbonate, nitrate, and hydroxide) on concrete structures, specifically examining the influence of different external alkali sources on ion penetration into concrete.
Article
Thermodynamics
Lukas Matejka, Pavel Siler, Radoslav Novotny, Jiri Svec, Jiri Masilko, Jan Koplik, Frantisek Soukal
Summary: Contamination of cement binders with zinc can hinder cement hydration, but the use of hydration accelerators can mitigate the effect. Thiocyanates have been found to decrease setting time of zinc-contaminated cement, but alkali thiocyanates retard hydration and negatively impact mechanical properties, while calcium thiocyanate effectively accelerates setting and improves compressive strength.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Lubos Bocian, Radoslav Novotny, Frantisek Soukal, Jakub Palovcik, Matej Brezina, Jan Koplik
Summary: This study investigates the removal of brass on the surface of steel fibers and its effect on the properties. The results show that the majority of brass can be removed using a mixture of NH3 and H2O2. Additionally, the surface treatment slightly impacts the mechanical properties by enhancing the mechanical interlocking between the fiber and the matrix.
Article
Chemistry, Physical
Vlastimil Bilek Jr, Lukas Kalina, Richard Dvorak, Radoslav Novotny, Jiri Svec, Jiri Masilko, Frantisek Soukal
Summary: This study investigates the relationships between the hydration kinetics of waterglass-activated slag and the development of its physical-mechanical properties, as well as its color change. Hexylene glycol was selected to modify the calorimetric response of alkali-activated slag. In the presence of hexylene glycol, the formation of initial reaction products was restricted to the slag surface, which delayed the bulk hydration of the waterglass-activated slag. Workability loss was correlated with the first half of the second calorimetric peak, while the most rapid increase in strengths and autogenous shrinkage was related to the third calorimetric peak.
Proceedings Paper
Construction & Building Technology
J. Kotrla, F. Soukal, J. Masilko, J. Svec, M. Janca
INTERNATIONAL CONFERENCE BUILDING MATERIALS, PRODUCTS AND TECHNOLOGIES
(2018)
Proceedings Paper
Construction & Building Technology
J. Bednarek, P. Ptacek, F. Soukal, J. Havlica, R. Novotny, J. Masilko, P. Siler
INTERNATIONAL CONFERENCE BUILDING MATERIALS, PRODUCTS AND TECHNOLOGIES
(2018)
Article
Metallurgy & Metallurgical Engineering
H. Rudianto, C. Edtmaier, I. Dlouhy, F. Soukal
ARCHIVES OF METALLURGY AND MATERIALS
(2017)
Article
Materials Science, Ceramics
Petr Ptacek, Tomas Opravil, Frantisek Soukal, Eva Bartonickova, Jakub Tkacz
CERAMICS INTERNATIONAL
(2017)
Proceedings Paper
Construction & Building Technology
Miroslava Moncekova, Radoslav Novotny, Jan Koplik, Lukas Kalina, Vlastimil Bilek, Frantisek Soukal
ECOLOGY AND NEW BUILDING MATERIALS AND PRODUCTS 2016
(2016)
Proceedings Paper
Construction & Building Technology
Jan Bednarek, Petr Ptacek, Jiri Svec, Frantisek Soukal, Ladislav Parizek
ECOLOGY AND NEW BUILDING MATERIALS AND PRODUCTS 2016
(2016)
