Improvement of Lime Reactivity towards Desulfurization by Hydration Agents

Maina, Paul

doi:10.7598/cst2013.233

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…The micrograph showed that the particles are packed together in powdered form with visible pores. The surface morphology (showing visible pores), indicates that the quicklime has good hydration properties [10,11].…”

Section: Sem Analysis Of the Quicklimementioning

confidence: 99%

Effects of process variables on the reactivity of slaked lime produced from Shuk quicklime

Udeh¹

2021

Global J. Eng. Tech. Adv.

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This is a research report of the effects of process variables on the reactivity of slaked lime produced from Shuk quicklime. It involved the calcination (at temperature of 1000 0C, particle size of 90 µm and time of 3 hrs) of Shuk limestone and subsequent slaking of its quicklime. The quicklime was characterized by x-ray diffractometer (XRD) and scanning electron microscopy (SEM) respectively to determine its mineral content and surface morphology respectively. Effects of process variables (quicklime/water ratio, particle size and time) on the reactivity of the slaked lime were determined. The reactivity was optimized using response surface methodology (RSM). The XRD analysis revealed calcite as the type mineral of the Shuk quicklime. The surface morphology of the quicklime sample showed that the particles are packed together in powdered form with visible pores that will allow passage of water. Reactivity of the lime was influenced by the quicklime/water ratio, particle size and time. Quadratic model appropriately explained the relationship between reactivity and considered slaking factors of quicklime/water ratio, particle size and time. The optimum reactivity value of the slaked lime was obtained as 59.3 oC at quicklime/water ratio of 0.24 g/ml, particle size of 88.2 µm and time of 15.1 minutes.

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Section: Sem Analysis Of the Quicklimementioning

confidence: 99%

Effects of process variables on the reactivity of slaked lime produced from Shuk quicklime

Udeh¹

2021

Global J. Eng. Tech. Adv.

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“…Such pores allow passage of fluids, thereby enhancing its solubility in the soil. The presence of the pores is also an indication that there will be efficient removal of CO2 during the calcination process [9,14].…”

Section: Sem Analysis Of the Limestonementioning

confidence: 99%

Processing of Ogbolokuta limestone through calcination technique for quicklime production

Udeh¹

2021

Int. J. Front. Eng. Tech. Res.

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Report on processing of Ogbolokuta limestone through calcination technique for quicklime production is presented. The limestone was washed to remove impurities, dried, ground in to powder form and classified with the aid of the automatic vibrating sieves of 80mm, 90mm, 100mm, 300mm and 425mm. X-ray fluorescence spectroscopy was used to determine the chemical compositions of the limestone, while its mineralogical composition was determined by X-ray diffractometer. Scanning electron microscope was used to study the surface morphology of the sample. Sample size area was grossly estimated by Langmuir method, while density functional theory was used to obtain different pore structural morphology of the sample. Analyses of the results showed that CaO (65.7%) is the predominant chemical constituent, and calcite is the main mineral of the limestone. Quicklime was successfully produced from Ogbolokuta limestone through calcination process. Calcination of the limestone enhanced its surface morphology. The quicklime yield was temperature, particle size and time dependent.

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“…However, the value is 5% lower compared to the theoretical CO2 mass content. The findings suggested that the calcination reaction only occurs on the particle surface, not in the whole particles (Ontiveros-Ortega et al, 2018;Maina, 2013) resulting in low CO2 mass content. The CO2 mass content in this study was observed similar from different limestone mines, indicating a similar release rate of CO2 for each calcination temperature.…”

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confidence: 98%

The Effect of Calcination Temperature on The Quality of Quicklime from Different Limestone Mines in West Sumatera, Indonesia

Desmiarti

Sari

Firdaus

et al. 2022

J. appl. agricultural sci. technol.

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Quicklime is a widely used industrial chemical and its characteristics may be affected by the limestone characteristics and calcination temperature. The present study investigated the quicklime characteristics obtained from limestone after calcination at different temperatures (800, 900, and 1000 ℃) from six geological-different mines in West Sumatera, Indonesia. X-ray fluorescence (XRF) analysis was performed to characterize the elemental compositions in limestone and quicklime. The stoichiometric evaluation was examined to compare the obtained carbon dioxide (CO2) from experimental and theoretical results during calcination. Based on elemental composition from XRF analysis, all the investigated limestones are very pure limestones, with impurities of less than 1%. The level of calcium oxide (CaO) after calcination at 1000℃ increased to more than 90% for all investigated limestone. The obtained CaO and CO2 mass after calcination at 1000℃ for 5 h were more than 70 and 60 grams, respectively. However, the experimental results on CaO and CO2 mass were 5–12% less than theoretical mass, reflecting the partial decomposition of calcium carbonate during the calcination process.

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Improvement of Lime Reactivity towards Desulfurization by Hydration Agents

Cited by 7 publications

References 21 publications

Effects of process variables on the reactivity of slaked lime produced from Shuk quicklime

Effects of process variables on the reactivity of slaked lime produced from Shuk quicklime

Processing of Ogbolokuta limestone through calcination technique for quicklime production

The Effect of Calcination Temperature on The Quality of Quicklime from Different Limestone Mines in West Sumatera, Indonesia

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