Potential of decarbonized coal gasification residues as the mineral admixture of cement-based material

Luo, Feng; Jiang, Yinshan; Wei, Cundi

doi:10.1016/j.conbuildmat.2020.121259

Cited by 36 publications

(16 citation statements)

References 19 publications

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“…(A, B) Comparison of the major element contents in the GE and GSP coal gasification residues and previous research (Chen et al, Lee et al, Li et al, Liu et al, Guo et al, Ji et al, Luo et al, and Zhang et al).…”

Section: Resultsmentioning

confidence: 91%

“…The average contents of the major elements in the GE and GSP coal gasification residues were compared to that from some of the others’ research ,,, published in the past 2 years (Figure ). The GE-CR had lower contents of Si and Al but higher Ca and Fe when compared to others’ data. ,,, For the GSP-CR, the Si content was higher than that from others’ research and the Al content was almost equivalent. The Ca and Fe contents in the GSP-CR were lower than most of the other data.…”

Section: Resultsmentioning

confidence: 99%

“…The GE coal gasification residues generally had high LOI contents (Figure ). The average LOI value of the GE-CRs was higher than those of the GSP-CRs and other studies ,,, (Figure A). The average LOI value of the GE-FRs was higher than those of the GSP-FRs and most of the listed research studies, ,− although it was slightly lower than the LOI of the fine slag tested by Zhang et al (Figure B).…”

Section: Resultsmentioning

confidence: 99%

“…Also, the fine slag can be modified into resin deodorants with excellent absorptivity and high thermal stability. Luo et al’s research showed that the decarbonized coal gasification residues may have a good effect on the fluidity and strength of cement-based materials when used as an admixture . Both the residual carbon and the inorganic materials in the coal gasification residues can be used and their utilizations were recognized to be restricted by each other before separation .…”

Section: Introductionmentioning

confidence: 99%

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Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

et al. 2020

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The chemistry of the feed coals and coal gasification residues derived from the commercial entrained-flow General Electric (GE) and Gaskombinat Schwarze Pumpe (GSP) coal gasification plants in China was investigated by proximate and ultimate and X-ray fluorescence (XRF) spectrometer analyses. The chemical compositions of the feed coals and gasification residues derived from the commercial GE and GSP coal gasification plants provided an understanding of the behaviors of the chemical components during entrained-flow coal gasification. The fate of chemical compositions during the commercial entrained-flow coal gasification was evaluated through systematic sampling and chemical analyses. Although the feed coals used in the GE and GSP coal gasification plants were generally similar in properties, the coal gasification residue ashes derived from the GSP gasification were more heterogeneous than those from the GE gasification. However, more proportions of carbon in the feed coal were converted during the GSP coal gasification according to the unreacted carbon contents in the gasification residues indicated by the loss on ignition value. Si and Al were stable in both the GE and GSP gasification processes, while Mg, Na, and P tended to be more volatile. However, the ashes of the GE coal gasification residues and GSP coal gasification residues were respectively ferricalsialic and calsialic, as was mainly determined by the properties of the feed coals instead of the gasification technology. A comparison to previous research showed that the GE and GSP coal gasification residues have a potential for carbon recovery and being used as the raw materials of inorganic materials such as geopolymers.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

et al. 2020

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“…Pomykala proved the possibility of using slag from gasification of coal as a component of concrete and binding mixtures (Pomykała, 2014). Luo et al investigated the influence of CGS on the fluidity of cement mortar as the admixture, which shows conducive to the fluidity (Luo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Durability of Concrete With Coal Gasification Slag and Coal Gangue Powder

et al. 2022

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Lack and quality decrease of supplementary cementing materials (SCMs) such as fly ash and granulated blast-furnace slag is increasingly prominent in China. Thus, the use of coal gangue (CG) and coal gasification slag (CGS) as SCMs in concrete attracted more researcher’s attention. This paper investigated the mechanical strength, porosity, and durability of CG-and CGS-added concrete. Experimental results showed that the activity of the treated CG and CGS is better than that of ordinary mineral SCMs, indicating that CG and CGS concrete can satisfy the requirements of ordinary construction under reasonable processing technology. Both CG-added and CGS-added concrete illustrated better chloride penetration resistance. The aluminum element contained in CG and CGS causes the C3S hydration to generate ettringite which is an erosion product under sulfate erosion, and it will intensify the damage of sulfate erosion. After 125th freeze-thaw cycles, the CGS-added concrete has no obvious failure which indicates that CGS-added concrete has great capacity in the frost resistance.

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Preparation and properties of a decarbonized coal gasification slag–fly ash filling material

Shao

Tang

et al. 2023

Environ Sci Pollut Res

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Potential of decarbonized coal gasification residues as the mineral admixture of cement-based material

Cited by 36 publications

References 19 publications

Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

Chemical Composition Changes during the Commercial Entrained-Flow General Electric and Gaskombinat Schwarze Pumpe Coal Gasification Processes

Durability of Concrete With Coal Gasification Slag and Coal Gangue Powder

Preparation and properties of a decarbonized coal gasification slag–fly ash filling material

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