Thermodynamics and kinetics of carbon dioxide chemisorption on calcium oxide

Beruto, D.; Botter, R.; Searcy, Alan W.

doi:10.1021/j150662a039

Cited by 35 publications

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“…Finally others interpret the chemical reaction kinetics of the CaCO 3 decomposition process and of CaO carbonation in a CO 2 atmosphere, using the rate equations governing the chemisorption-desorption phenomena [2,15,35,36,37]. …”

Section: 1mentioning

confidence: 99%

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Escardino

García-Ten

Feliú

et al. 2013

Journal of Industrial and Engineering Chemistry

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The thermal decomposition process of calcite particles (0.45-3.60 mm of average diameter), made up of porous agglomerates of very small CaCO 3 microcrystals has been studied in the 975-1216 K temperature range under isothermal conditions in presence of mixtures of air and carbon dioxide with different compositions.An equation, which relates the calcite conversion degree with both reaction time and operating conditions, has been proposed. The equation satisfactorily fits to the experimental results obtained in the entire tested range of particle sizes and of temperatures in all the range of carbon dioxide concentrations studied.

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Section: 1mentioning

confidence: 99%

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Escardino

García-Ten

Feliú

et al. 2013

Journal of Industrial and Engineering Chemistry

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“…However, it is obvious that the CO 2 can interact with the calcium oxide resulting from calcite decomposition. This assumption is supported by the following facts: a) A certain number of researchers 5,6,7 , on studying the thermal decomposition process of different varieties of limestone in the presence of carbon dioxide, have suggested the possible participation of an adsorption step of the CO 2 on the CaO resulting from the decomposition of that compound.b) The results obtained in a paper recently submitted for publication 8 , in which the thermal decomposition in CO 2 atmosphere of small calcite particles, of the same nature as those introduced into the ceramic test pieces used in this research, was studied. Those results suggest that, at the gas CaO interface, an equilibrium law of the form…”

mentioning

confidence: 90%

Section: Introductionmentioning

confidence: 96%

Calcium carbonate decomposition in white-body tiles during firing in the presence of carbon dioxide

Escardino

García-Ten

Saburit

et al. 2013

Ceramics International

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This study examines the thermal decomposition process of the calcium carbonate (calcite powder) contained in test pieces of porous ceramics, of the same composition as that used in manufacturing ceramic wall tile bodies, in the presence of carbon dioxide, in the temperature range 1123 1223 K. The experiments were carried out in a tubular reactor, under isothermal conditions, in a gas stream comprising different concentrations of air and carbon dioxide.Assuming that the relationship between the molar concentrations of CO 2 on both sides of the gas solid interface in the test pieces was conditioned by an equilibrium law of the form The knowledge derived from this research has enabled the firing cycle used in the single-fire manufacture of this type of wall tile to be optimised. I ntroduction Object of this researchCalcite is the calcium compound that is usually added, as a source of CaO, to the raw materials mixture used to form the tile body in the single-fire manufacturing process of whitebody wall tiles 1 . During firing, the calcite particles need to completely decompose before the Corresponding author. e-mail address: aescardino@itc.uji.es 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 glaze melts and seals the tile surface in order to keep the CO 2 released in the tile body by this reaction from being trapped as small bubbles in the molten glaze layer 2 . *Manuscript Click here to view linked ReferencesIn order to optimise the calcite decomposition stage in the industrial firing cycle used to manufacture this type of tile, it was deemed useful to have a mathematical expression that would relate the decomposition progress of the calcite contained in the tile body to the operating variables (time, temperature, tile shape and size, etc.).The thermal decomposition process of very small calcite particles contained in ceramic compacts, analogous to those used in the manufacturing process to form white-firing earthenware tile bodies, has been studied in two previous papers 3,4 . The experiments were conducted in air atmosphere, at different temperatures, using disks of different initial porosity, thickness, and calcite content. The results were interpreted using an equation derived on applying the Shrinking Unreacted Core Kinetic Model.These papers have been the first phase of a study which has yielded a kinetic model that takes into account the influence of the dimensional and structural characteristics of the test disk and of the chemical reaction of decomposition that is developed. This kinetic model satisfactorily describes the kinetics of the process when is conducted in air atmosphere.In industrial practice, however, the thermal decomposition process of the calcite contained initially in the body of this type of tiles occurs in presence of a mixture of air and carbon dioxide that contains between 5 1...

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“…알칸올 아민류는 분자구조 내에 하이드록실기 (-OH)와 아미노기 (-NH 2 )를 동시 에 가지고 있으며, 아미노기에 의해 염기성을 띠어 산성가스와 반응을 하지만 암모니아와 비슷한 강한 냄새가 나기 때문에 실내현장 적용 시 문제가 발생할 수 있다 (Ahn et al, 2010). 하기 때문에 저온 분위기일수록 흡착량이 증가하는 것으로 사료된다 (Kim et al, 2010;Beruto et al, 1984). …”

Section: 높은 알칼리도에 의해 이산화탄소 분자와 빠르게unclassified

Adsorption of Low-level CO₂using Activated Carbon Pellet with Glycine Metal Salt Impregnation

Lim

Adelodun²,

Jo³

2014

Journal of Korean Society for Atmospheric Environment

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Thermodynamics and kinetics of carbon dioxide chemisorption on calcium oxide

Cited by 35 publications

References 0 publications

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Calcium carbonate decomposition in white-body tiles during firing in the presence of carbon dioxide

Adsorption of Low-level CO₂using Activated Carbon Pellet with Glycine Metal Salt Impregnation

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Thermodynamics and kinetics of carbon dioxide chemisorption on calcium oxide

Cited by 35 publications

References 0 publications

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Kinetic study of the thermal decomposition process of calcite particles in air and CO2 atmosphere

Calcium carbonate decomposition in white-body tiles during firing in the presence of carbon dioxide

Adsorption of Low-level CO2using Activated Carbon Pellet with Glycine Metal Salt Impregnation

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Product

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Adsorption of Low-level CO₂using Activated Carbon Pellet with Glycine Metal Salt Impregnation