Role of Maceral Composition on the Formulation of Concentrated Coal-Water Slurry Using a Natural Surfactant

Meher, Jibardhan; Das, Dillip Kumar; Samal, Akshaya K.; Misra, Pratibha

doi:10.1016/j.matpr.2018.10.374

Cited by 18 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The degree of condensation (DOC) 45,46 of aromatic rings can be determined as eqn (9). DOC = A 700-900 /A 1600 (9) The structural parameter of oxygen-containing functional groups, 'C', represents the changes in the ratio of C]O to C]C groups, is used to indicate the maturation of coal, 47,48 which can be determined as eqn (10).…”

Section: Characterizing Chemical Structures Of Coal Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Construction and verification of vitrinite-rich and inertinite-rich Zhundong coal models at the aggregate level: new insights from the spatial arrangement and thermal behavior perspective

Wang

Zhao

et al. 2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Characterizing Chemical Structures Of Coal Samplesmentioning

confidence: 99%

“…[6][7][8] Meanwhile, maceral composition in the utilization of coal can play a vital role in these thermal reactivities, even affecting formulating coal-water slurry. 9,10 With the continuous development of molecular simulation technology, it is urgent to construct a reasonable Zhundong coal structure model for further research.…”

Section: Introductionmentioning

confidence: 99%

Construction and verification of vitrinite-rich and inertinite-rich Zhundong coal models at the aggregate level: new insights from the spatial arrangement and thermal behavior perspective

Wang

Zhao

et al. 2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…The charge and hydrophobicity/hydrophilicity of a particle surface and the molecular structure of the solvent in the interfacial area belong to basic properties for a solid–liquid suspension. The changes in interface properties resulting from the adsorption and orientation of dispersants at the interface determine the stability of the dispersion system. ,,,, …”

Section: Interactions In Cws Systemmentioning

confidence: 99%

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Feng

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Dispersants are chemical moieties that modify interfacial characteristics by adsorption at the solid–liquid interface, and they have been widely used in modern industrial production. This review focuses on the research and perspectives of anionic dispersants for coal–water slurry (CWS). Various common anionic dispersants are briefly summarized, including natural and synthetic species. The interactions between coal particles in the CWS suspension, including van der Waals attraction and electrostatic repulsion, are described by the DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. Due to the hydrophobic interaction and the steric effect resulting from the adsorption of polymer dispersants, the extended DLVO theory is introduced to elucidate the various interactions in the CWS system. Based on the interactions between the coal particles, the adsorption behaviors at the coal–water interface, and the interactions between coal and water, the dispersion and stabilization mechanisms are systematically and theoretically discussed. According to the variations of interaction energies between the coal particles, the use of anionic polymer dispersants can weaken the hydrophobic attraction and enhance the steric hindrance and electrostatic repulsion. Also, the rheological behaviors of CWSs are outlined, with emphasis on the pipeline transportation of CWS and the three-parameter Herschel–Bulkley model. Additionally, the properties of anionic dispersants for CWS can be improved by adjusting their chemical structures such as molecular weight, side chain length, rigidity and flexibility of the molecular chain, and variety, quantity, position, and proportion of hydrophobic and hydrophilic groups. In view of the relationships between the structure and property, a direction on the selection and preparation of dispersant for CWS is suggested. Finally, the current challenges and future perspectives of dispersants for CWS are put forward.

show abstract

“…Wyniki analizy planimetrycznej są pomocne w rozwiązywaniu szerokiego spektrum problemów badawczych (np. Hower et al, 2012;Pan et al, 2013;Lei et al, 2014;López-Días et al, 2016;Meher et al, 2019). Analiza wykonywana jest przy użyciu mikroskopu i polega na identyfikacji minerałów/macerałów w kolejnych punktach, tworzących siatkę o oczkach najczęściej w kształcie kwadratów.…”

Section: Konrad Ziemianinunclassified

Zastosowanie analizy planimetrycznej w badaniach geologicznych – eksperymenty i spostrzeżenia

Ziemianin

2021

View full text Add to dashboard Cite

Planimetric analysis is a well-known and commonly used method for determining the content of a given component in the area of the analyzed surface. In geology, it is used to determine both the mineral and maceral composition, and its results are helpful in solving a wide range of research problems. The aim of this study was to investigate the relationships between the obtained results of planimetric analysis and the density of the measurement grids, which can be adapted to specific situations in geological samples in order to optimize the ratio of the accuracy of the result to the time of analysis. The research was divided into two stages. Models were used in the first stage, while in the second, coal samples were investigated. In the first stage, a virtual grid of measurement points with dimensions of 100 by 100 points was created, which gave a total of 10 000 points. After creating the measurement grid model, 102 scenarios were established, differing in the content of the analyzed component A (0.1%, 0.5% and from 1 to 100%). In each of the adopted scenarios, 100 combinations were carried out so that the arrangement of points on the measurement grid corresponding to component A was random. Then, the number of measuring points was reduced several times from the original 10 000 to 100 and each time content of component A was calculated. The obtained average component A content in most cases turned out to be only slightly different from the original, which cannot be stated in the case of both minimum and maximum values – here a wider range of results is observed. In the second stage, 3 coal samples of varying maceral composition complexity were investigated and a measurement grid of 100 by 100 points was used. The original grid density was gradually reduced (down to 144 points) and maceral composition was calculated each time. Results obtained from models as well as from samples show a clear trend of decreasing accuracy with decreasing density of the measuring grid. The obtained results were also analyzed in terms of the established acceptance criteria for which the content of the component was assumed to be different from its content based on a grid of 10 000 points by up to 5%, 10% or 30% of the original value. The analysis of the relationship between the accuracy of the obtained results and the time of conducting the analysis seems to indicate that the choice of the measurement grid based on 500 points is optimal.

show abstract

Role of Maceral Composition on the Formulation of Concentrated Coal-Water Slurry Using a Natural Surfactant

Cited by 18 publications

References 35 publications

Construction and verification of vitrinite-rich and inertinite-rich Zhundong coal models at the aggregate level: new insights from the spatial arrangement and thermal behavior perspective

Construction and verification of vitrinite-rich and inertinite-rich Zhundong coal models at the aggregate level: new insights from the spatial arrangement and thermal behavior perspective

Review and Perspectives of Anionic Dispersants for Coal–Water Slurry

Zastosowanie analizy planimetrycznej w badaniach geologicznych – eksperymenty i spostrzeżenia

Contact Info

Product

Resources

About