Mineral and Heavy Metal Composition of Oil Shale Ash from Oxyfuel Combustion

Konist, Alar; Neshumayev, Dmitri; Baird, Zachariah; Anthony, Edward J.; Maasikmets, Marek; Järvik, Oliver

doi:10.1021/acsomega.0c04466

Cited by 14 publications

(4 citation statements)

References 26 publications

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“…The thermal conductivity, as seen from Figure 4, was also found to decrease from 0.241 W/m•K to 0.124 W/m•K with W/A increasing from 0.4 to 0.8. The associated reduction in thermal conductivity with density decrease was reported by many researchers [8,[22][23][24][25][26][27][28][29]. The main reason for the decline in bulk density and thermal conductivity is the porous nature of the pozzolanic products in the treated ash (the hydration reactions), in addition to the more porous structure developed through the slow water evaporation rate (dehydration) during the three days of the curing period.…”

Section: X-ray Powder Diffraction and Energy Dispersive X-ray Analysesmentioning

confidence: 84%

Determination of some physico-thermal and mechanical characteristics of hydrated Jordanian Lajjun oil shale ash

Shawabkeh¹,

Alansari²,

Ghernaout³

et al. 2023

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The hydration of oil shale ash at different water-to-ash weight (W/A) ratios ranging from 0.4 to 0.8 was experimentally investigated. The ash hydrate's physical characteristics, its particles' elemental composition, and the existing crystalline phases were identified using N 2 Brunauer-Emmerich-Teller (N 2 -BET), Energy Dispersive X-ray (EDX) and X-ray Powder Diffraction (XRD) measurement techniques. The formed hydration cementitious products were found to be stratlingite (2CaOin the oil shale ash hydrated at W/A = 0.6. These same phases with different relative amounts were found in the oil shale ash hydrated at W/A = 0.8 in addition to calcium silicate hydrates (CSH). The drop in the physico-thermal properties (bulk density and thermal conductivity) of the hydrated ash was attributed to the formation of cementitious products, mainly to stratlingite, melilite, and ettringite. The hydrated ash's mechanical properties (bending and compressive strengths) were found to increase at higher W/A due to the formation of cementing materials, particularly CSH.

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Section: X-ray Powder Diffraction and Energy Dispersive X-ray Analysesmentioning

confidence: 84%

Determination of some physico-thermal and mechanical characteristics of hydrated Jordanian Lajjun oil shale ash

Shawabkeh¹,

Alansari²,

Ghernaout³

et al. 2023

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“…%) than that of the other OSAs. Furthermore, the composition of OSA is close to the Estonian oil shale ash [10,11]. Table 1 shows the physical test values of OSA as conducted in accordance with the CSA A3001 [12].…”

Section: Methodsmentioning

confidence: 99%

Evaluation the Effect of Adding Oil Shale Ash on the Compressive Strength of Concrete

Gougazeh¹

2022

Adv. Sci. Technol. Res. J.

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In the present study, the effect of cementing properties of oil shale ash on the compressive strength of the concrete mixtures produced from oil shale ash, cement, sand, and water was investigated. The used shale ash was produced by direct combustion at 830°C in a laboratory muffle furnace of the El-Lajjun oil shale. Based on the chemical composition of shale ash (OSA), it was concluded that this material consists of a high percentage of CaO which forms the properties of cement materials as well as the contents of SiO 2 , Al 2 O 3 , and Fe 2 O 3 form the properties of pozzolanic materials. Oil shale ash (OSA) materials have diverse applications as alternative materials for the construction industry and construction technology to reduce environmental risks and achieve sustainability. The results showed that the pressed specimen with 40 wt.% OSA content, 50 wt.% sand content and 30% MW obtained the highest compressive strength of about 9.1 MPa after 28 days of hardening. The highest value of 28 days compressive strength for a compacted specimen containing 35 wt.% OSA and 35% MW were achieved with 12 MPa at a compaction pressure of between 25 and 30 MPa. High compressive strength values were found to be achieved in the compressed specimens by controlling mixing water. It is also indicated that the compressive strength increases as OSA content in the compressed specimen increases and increases as compaction pressure increases.

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“…While crude oil extraction and natural gas production have modernized our society, the environmental pollution cost has been more severe than expected ( Blumer and Sass 1972 ; Almeda et al, 2014 ; Beyer et al, 2016 ; Ghorbani and Behzadan 2021 ). Incineration is one of the most common, effective and high-performance technologies for the disposal of municipal solid waste ( Liu et al, 2019 ; Zhao et al, 2019 ), oil sludge ( Gong et al, 2018 ), oil shale ash ( Konist et al, 2020 ), and medical wastes ( Thind et al, 2021 ). However, the disposal of fly and bottom ash produced by the incineration of various types of waste results in the occupation of large amounts of land resources ( Allegrini et al, 2014 ), which is accompanied by secondary pollution problems, such as the transfer of heavy metals to the gas phase ( Li et al, 2003 ; Tian et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Utilization of gasification slag and petrochemical incineration fly ash for glass ceramic production

et al. 2023

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This study investigated glass ceramics produced using coal gasification slag (CGS) and petrochemical incineration fly ash (PIFA) to immobilize hazardous heavy metals such as Cr and As. However, the crystallization kinetics and stabilization behavior mechanism of different heavy metals in the petrochemical incineration fly ash-derived glass-ceramics remains unclear. And X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, and inductively coupled plasma mass spectrometry were used to characterize glass and crystalline products. In this paper, we reported the crystallization kinetics and chemical leaching characteristics of the glass ceramic. A low crystallization activation energy of 121.49 kJ/mol was achieved from crystallization peak of several different heating rates around 850°C, implying that it is easier to produce the glass ceramics at that temperature. The Avrami parameter of the former crystallization was determined to be 1.23 ± .12, which indicated two-dimensional crystal growth with heterogeneous nucleation. The toxicity characteristic leaching procedure results indicated that the heavy metals were well solidified, and that the leaching concentration was significantly lower than the limit specified by governmental agencies. The potentially toxic element index of the parent glass and the two glass ceramics were 11.7, 5.8, and 3.6, respectively. Therefore, the conversion of hazardous petrochemical incineration fly ash and other solid waste into environmentally friendly glass ceramics shows considerable potential and reliability.

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Mineral and Heavy Metal Composition of Oil Shale Ash from Oxyfuel Combustion

Cited by 14 publications

References 26 publications

Determination of some physico-thermal and mechanical characteristics of hydrated Jordanian Lajjun oil shale ash

Determination of some physico-thermal and mechanical characteristics of hydrated Jordanian Lajjun oil shale ash

Evaluation the Effect of Adding Oil Shale Ash on the Compressive Strength of Concrete

Utilization of gasification slag and petrochemical incineration fly ash for glass ceramic production

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