Behavior and characteristics of amorphous calcium carbonate and calcite using CaCO 3 film synthesis

Lee, Seung-Woo; Kim, Yong-Jae; Lee, Yun-Hee; Guim, Hwanuk; Han, Seug Min

doi:10.1016/j.matdes.2016.09.099

Cited by 59 publications

(17 citation statements)

References 26 publications

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“…For the TG and DTG curves, two peaks corresponding to the same temperature can be noticed; these results show that the decomposition temperature of calcium carbonate was around 700 °C, and according to the literature data, the CaCO3 decomposition temperature is 825 °C [40]. However, the first peak corresponds to the decomposition of Ca(OH)2, which could be formed from moisture contained in the biomass [41]. For sorbent obtained after the pyrolysis process at a temperature 500 °C, the second peak is the lowest compared to the two others.…”

Section: Thermogravimetric Analysis Of Sorbent (Cao)mentioning

confidence: 52%

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

et al. 2020

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The presented work is focused on biomass thermochemical conversion with integrated CO2 capture. The main aim of this study was the in-depth investigation of the impact of pyrolysis temperature (500, 600 and 700 °C) and CaO sorbent addition on the chemical and physical properties of obtained char and syngas. Under the effect of the pyrolysis temperature, the properties of biomass chars were gradually changed, and this was confirmed by examination using thermal analysis, scanning electron microscopy, X-ray diffraction, and porosimetry methods. The chars were characterised by a noticeable carbon content (two times at 700 °C) resulting in a lower O/C ratio. The calculated combustion indexes indicated the better combustible properties of chars. In addition, structural morphology changes were observed. However, the increasing pyrolysis temperature resulted in changes of solid products; the differences of char properties were not significant in the range of 500 to 700 °C. Syngas was analysed using a gas chromatograph. The following main components were identified: CO, CO2, CH4, H2 and C2H4, C2H6, C3H6, C3H8. A significant impact of CaO on CO2 adsorption was found. The concentration of CO2 in syngas decreased with increased temperature, and the highest decrease occurred in the presence of CaO from above 60% to below 30% at 600 °C.

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Section: Thermogravimetric Analysis Of Sorbent (Cao)mentioning

confidence: 52%

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

et al. 2020

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“…On the other hand, a peak at 2 θ = 29.5°corresponds to a calcite peak resulting from calcium stearate added for the compatibilizer 41,42 . The LDPE/ES film showed two weak diffraction peaks at 21.7°, 22.4° and a strong peak at 29.6° compared to the LDPE film, indicating that the component of the film changed from amorphous calcium carbonate to calcite form 43 …”

Section: Resultsmentioning

confidence: 98%

Preparation of low‐density polyethylene‐ and poly (lactide)/poly (butylene adipate‐co‐terephthalate)‐based antibacterial films integrated with elemental sulfur and sulfur nanoparticles

et al. 2021

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Antibacterial low‐density polyethylene (LDPE)‐ and poly (lactide)/poly (butylene adipate‐co‐terephthalate) (PLA/PBAT)‐based films incorporated with elemental sulfur (ES) and sulfur nanoparticles (SNPs) were prepared using a blow extrusion method for food packaging applications. Flexible and free‐standing films were manufactured using an industrial processing method without any modification. The films were characterized using ultraviolet (UV)–visible spectroscopy, field emission scanning electron microscope (FESEM), X‐ray diffraction (XRD), Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA). Also, film properties include optical, mechanical, surface hydrophobicity, thermal stability and antibacterial activity. The addition of ES and SNP significantly reduced the light transmittance (both UV and visible light) of LDPE‐ and PLA/PBAT‐based films and slightly reduced mechanical properties but did not affect thermal stability. The ES‐ and SNP‐added films showed apparent antibacterial activity against the Gram‐positive foodborne pathogenic bacteria (Listeria monocytogenes). In general, SNP showed superior film properties and antibacterial properties compared to ES, but ES also showed comparable properties as SNP. Antibacterial LDPE‐ and PLA/PBAT‐based films can be produced on an industrial scale and used in the packaging of refrigerated foods susceptible to L. monocytogenes contamination.

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“…Due to nH 2 O characterized in the form of hydroxyl, a fully-hydroxylated SiO 2 surface was established to represent the aggregate surface. CO 3 2− and Ca 2+ ions in calcite are prone to necking of electron density and the ionic bonds between them can easily break [ 38 , 39 ]. CO 3 2− ions can easily form bonds with H+ ions in residual adsorbed water to form HCO 3 − [ 40 , 41 ].…”

Section: Models and Simulation Methodsmentioning

confidence: 99%

Investigation of the Effects of Adsorbed Water on Adhesion Energy and Nanostructure of Asphalt and Aggregate Surfaces Based on Molecular Dynamics Simulation

Cui

Huang

et al. 2020

Polymers

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The purpose of this study was to investigate the effect of aggregate surface adsorbed water on the adhesive capacity and nanostructure of asphalt-aggregate interfaces at the atomic scale. Molecular dynamics (MD) simulation was performed to measure and analyze the molecular interactions of asphalt binder with calcite and silica. Radial distribution function (RDF) and relative concentration (RC) were applied to characterizing the concentrations and distributions of asphalt components on aggregate surfaces. In addition, debonding energy and adhesion energy were employed to calculate the variations of interface adhesion energy of the asphalt-aggregate system under different conditions. The obtained results illustrated that the water molecules adsorbed onto the surface of weakly alkaline aggregates inhibited the concentration and distribution of asphalt components near the aggregate surface, decreased adhesion energy between asphalt and aggregates, and changed asphalt nanostructure. Especially, when external free water intruded into the interface of the asphalt-calcite system, the adsorbed water interacted with free water and seriously declined the water damage resistance of the asphalt mixture with limestone as an aggregate and decreased the durability of the mixtures. The water adsorbed onto the surface of the acid aggregate negatively affected the asphalt-silica interface system and slightly reduced the water damage resistance of the asphalt mixture.

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Behavior and characteristics of amorphous calcium carbonate and calcite using CaCO 3 film synthesis

Cited by 59 publications

References 26 publications

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

Preparation of low‐density polyethylene‐ and poly (lactide)/poly (butylene adipate‐co‐terephthalate)‐based antibacterial films integrated with elemental sulfur and sulfur nanoparticles

Investigation of the Effects of Adsorbed Water on Adhesion Energy and Nanostructure of Asphalt and Aggregate Surfaces Based on Molecular Dynamics Simulation

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