Decomposition and solid reactions of calcium sulfate doped with SiO2, Fe2O3 and Al2O3

Yan, Zhiqiang; Wang, Zean; Líu, Hao; Tu, Yaojie; Wei, Yang; Zeng, Hanqing; Qiu, Jianrong

doi:10.1016/j.jaap.2015.03.019

Cited by 83 publications

(20 citation statements)

References 20 publications

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“…Marchal, in her study of CaSO4 decomposition at elevated temperatures [38] and more recently Mihara et al [39] and Yan et al [40] reported that the presence of Fe2O3 These reactions may explain the many oxygen release peaks identified in the TG-MS curves of the waste in N2 atmosphere in Figure 3, occurring simultaneously to the many SO2 released peaks.…”

Section: Tg-ms Resultsmentioning

confidence: 89%

Qualitative and quantitative characterization of a coal power plant waste by TG/DSC/MS, XRF and XRD

Fernández

González

Pesquera

et al. 2016

J Therm Anal Calorim

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SO2 removal from coal-fired power plant flue gases can be done by dry, semi-dry or wet desulfurization processes, using limestone or lime containing products as sorbents. In a Brazilian coal power plant there is a dry desulfurization unit to capture SO2 with hydrated lime from the combustion gases. A part of the flying ashes produced is mixed with the bottom coal ashes and the spent sulphated product generated after SO2 capture. This residual solid blend is then buried in a non-productive area, from which coal was already extracted and is studied in this work. According to the authors experience in development and characterization of adsorbents for low temperature dry desulfurization processes and in Thermogravimetric Analysis, this paper shows and discusses a method which was developed to characterize qualitative and quantitatively the chemical and mineral composition of this waste by using Thermogravimetry coupled with mass spectrometry (TG/MS), X-ray fluorescence (XRF) and X-ray diffraction (XRD), to preview new potential industrial applications for this waste.

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Section: Tg-ms Resultsmentioning

confidence: 89%

Qualitative and quantitative characterization of a coal power plant waste by TG/DSC/MS, XRF and XRD

Fernández

González

Pesquera

et al. 2016

J Therm Anal Calorim

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show abstract

“…Meanwhile, the content of CaSO 4 declined from 61.59% to 60.66%. However, the content of SrSO 4 was still maintained at [22]. These solid-phase reactions accelerated the decomposition of CaSO 4 , according to Eqs.…”

Section: Migration and Transformation Of Sulfurmentioning

confidence: 95%

“…T>900ºC.A number of studies determined the initial decomposition temperature of pure CaSO 4 solid to range from 1200-1250ºC[21][22]. Here, CaSO 4 decomposed at 900ºC for two reasons.…”

mentioning

confidence: 99%

Predicting Gaseous Pollution of Sintered Brick Preparation from Yellow Phosphorus Slag

Ming¹,

Liu²,

Fan³

et al. 2019

Pol. J. Environ. Stud.

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“…The limestone's components change with the producing area. The major impurities of limestone were MgCO 3 , SiO 2 , Al 2 O 3 and Fe 2 O 3 [4,[17][18][19]. The data in Figure 2 The investigation of the four types of limestone indicated that limestone components had significant effects on the moisture content of DH products and moderate effects on desulfurization efficiency (relevant data is shown in Figure 3a).…”

Section: Selection Of Limestone Typesmentioning

confidence: 98%

Optimizing the characteristics of calcium sulfate dihydrate in the flue gas desulfurization process: Investigation of the impurities in slurry-Cl-, Fe3+, Mn2+

Lv¹,

Yang²,

Shen³

et al. 2017

CI&CEQ

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The effects of limestone, Cl-, Fe 3+ and Mn 2+ in slurry on the characteristics of calcium sulfate dehydrate (DH) in flue gas desulfurization (FGD) process were investigated. The moisture content, particle size distribution, and crystal morphology were considered as end use characteristics of DH. As a result, the number of needle-like DH crystals was increased with increasing total contents of MgCO 3 , Al 2 O 3 and Fe 2 O 3 in limestone. Clions were reported to distort the crystal structure and change the crystals from orthorhombic to irregular. Mn 2+ can increase the desulfurization efficiency by catalyzing the oxidation of SO 2. Finally, Fe 3+ will inhibit crystal growth of all faces, except {011} and {1-11}.

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Decomposition and solid reactions of calcium sulfate doped with SiO2, Fe2O3 and Al2O3

Cited by 83 publications

References 20 publications

Qualitative and quantitative characterization of a coal power plant waste by TG/DSC/MS, XRF and XRD

Qualitative and quantitative characterization of a coal power plant waste by TG/DSC/MS, XRF and XRD

Predicting Gaseous Pollution of Sintered Brick Preparation from Yellow Phosphorus Slag

Optimizing the characteristics of calcium sulfate dihydrate in the flue gas desulfurization process: Investigation of the impurities in slurry-Cl-, Fe3+, Mn2+

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