A technique proximate and ultimate analysis of solid fuels and coal tar

“…According to ASTM D2795‐95 and ASTM D1857‐87, ash composition and ash fusion temperature were measured, respectively 36 . Following the ASTM D3176, we applied the elemental analyzer to determine the ultimate analysis and used a muffle furnace to characterize the proximate analysis on the basis of ASTM D 3174 37 …”

Section: Methodsmentioning

confidence: 99%

“…36 Following the ASTM D3176, we applied the elemental analyzer to determine the ultimate analysis and used a muffle furnace to characterize the proximate analysis on the basis of ASTM D 3174. 37 In order to prepare ash, pulverized coal was first heated for dry oxidation at 823 K, 38 following the rule of ASTM E1755. It could be seen from Table 1 that coal ash has a higher content of CaO (27.46%) and Na 2 O (7.60%), compared with other coals.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Fang

Wang

Luo

et al. 2022

Asia-Pacific J Chem Eng

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This article investigates the evolution of morphology and pore structure during sintering at 1200 C for a high sodium coal ash, with and without using a calcium oxide additive. The effect of different proportions of calcium oxide additive was studied. The ratios of height and area of samples were calculated, and representative sintering time points of morphological changes were captured. Meanwhile, frequencies of diameter, pore numbers, and porosities were obtained by processing images. The maximum ratio of height and area reached at 15 min, 4 min, and 10 min for the sintering process of coal ash sample without additive, with 5% and 10% CaO, proving that CaO accelerates the sintering process. In comparison, the maximum porosities were 52.4%, 39.5%, and 47.0% for sintering samples after 10 min, 6 min, and 40 min.Besides, X-ray diffraction analysis of the minerals of the condensed white matter was conducted.

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“…44 The proximate analysis is determined using the muffle furnace according to the ASTM D3174-84 while the ultimate analysis is determined using an elemental analyzer in the light of ASTM D3176-84. 45 Ash fusion temperature and ash composition are determined in accordance with ASTM D1857-87 and ASTM D2795-95, respectively. 46 We selected Zhundong coal as the research object in this paper because the largest intact coalfield in the world was predicted to produce 390 billion tons of Zhundong coal.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology

Wang

Zhou

et al. 2021

Energy Fuels

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This paper explores the evolution of pore structure parameters during Zhundong coal and biomass ash sintering at 1473 K. Additionally, the influences of blending biomass ash with different proportions are determined. The pore parameters, including the porosity, diameter, number, and frequency of the equivalent diameter, were processed by reconstructing and processing three-dimensional (3D) data on the basis of X-ray computed microtomography (XCT). The maximum porosities for the cases of pure coal and mixture of 10% biomass and 50% biomass during sintering are determined to be 46.6, 42.6, and 24.0%, respectively, while the frequencies of small pores (<0.2 mm) in the coal ash samples are lower than those in the other cases. In addition, the mineralogical phase transformation during sintering is identified by X-ray diffraction analysis. The condensate in the pores mainly comprises NaCl, CaSO 4 , and KCl, which indicates that the volatilization of alkali metals and the formation and gasification of anhydrite occur throughout the sintering process.

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A technique proximate and ultimate analysis of solid fuels and coal tar

Cited by 21 publications

References 10 publications

Influence of volatiles oxidation processes on kinetics of sawdust combustion

Influence of volatiles oxidation processes on kinetics of sawdust combustion

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology

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