Improving stability of concentrated coal–water slurry using mixture of a natural and synthetic surfactants

Das, Dillip Kumar; Das, B.; Meher, Jibardhan; Misra, Pratibha

doi:10.1016/j.fuproc.2013.02.021

Cited by 122 publications

(38 citation statements)

References 70 publications

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“…In the process of coal particles dispersing into aqueous solution, the coal particle was firstly wet by aqueous solutions, and by increasing the wettability of the coal surfaces, dispersants reduce the frequently observed tendency of hydrophobic coal particles to spontaneously aggregate in aqueous suspensions, therefore, the lower surface tension of the aqueou solution is, the easier the wetting of solid particles so as to help the coal particles more readily disperse into aqueous solution [41]. Convincing evidence for the validity of the proposed adsorption mechanism was obtained by surface tension and wettability measurements.…”

Section: Surface Activities Of Dispersants In Solution and Wettabilitmentioning

confidence: 99%

Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry

Qin

Yang

Guo

et al. 2015

Journal of Industrial and Engineering Chemistry

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Section: Surface Activities Of Dispersants In Solution and Wettabilitmentioning

confidence: 99%

Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry

Qin

Yang

Guo

et al. 2015

Journal of Industrial and Engineering Chemistry

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“…Our primary interest has been centered on the studies of the interactions prevailing within the single or mixed systems involving surfactants and the organization/orientation of the surfactants [18][19][20][21][22] within the organized assemblies. Herein, we analyzed the mixtures of BSA with CTAB (C 16 ), tetradecyltrimethylammonium bromide (TTAB, C 14 ), and dodecyltrimethylammonium bromide (DTAB, C 12 ) in aqueous solutions to investigate largely the physicochemical characteristics of the mixtures and the mechanism of the organization of the assemblies.…”

Section: Introductionmentioning

confidence: 99%

Investigation of bovine serum albumin-surfactant aggregation and its physicochemical characteristics

Misra

Das

Maharana

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…41 After preparation of weighted pulvurized coal, CWS were sealed in glass cylinder at room temperature for 24 hr. 41 After preparation of weighted pulvurized coal, CWS were sealed in glass cylinder at room temperature for 24 hr.…”

Section: T a B L E 1 Proximate Analysis Of Different Coal Samplesmentioning

confidence: 99%

“…The result showed pseudoplastic behavior at higher concentrations that increased viscosity due to coal properties. 41 The presence of soluble ions in coal-like Ca 2+ , Mg 2+ , and Al 3+ in CWS favors to develop the cross-linking net structures by connecting bonding among the coals, which can impart more stability to the slurry. CWS canting higher amount of ash content leads toward the aggregation or gel state that makes flow difficult due to the increase of viscosity.…”

Section: Effect Of Coal Concentration Without Dispersant Additionmentioning

confidence: 99%

Rheological improvement in performance of low‐rank coal–water slurries using novel cost‐effective additives

Amin

Tahir

Saleem

et al. 2020

Asia-Pacific J Chem Eng

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Coal-water slurry (CWS) has been targeted as a promising fuel and an alternative to fuel oil. CWS has numerous advantages of low and convenient transportation and high solid content. Pakistan is going through a severe energy crisis and among the top 10 countries facing energy crises reported by the United Nations. Besides, Pakistan has become the top seventh country in coal reserves (i.e., 185 billion tones) after the discovery of huge lignite coal reserves in Thar, Sind province. Previous studies investigated the use of additives to enhance CWS properties at a low shear rate and its utilization accordingly. Particularly, the present work studied the high range of shear rate to improve the properties of CWS for transportation and combustion purposes. This study on the improvement in performance of rheology properties of CWS is conducted to improve the properties by cost-effective additives. The coal concentration varies from 20% to 60%, whereas runs were carried out with and without the costeffective additives. The results demonstrated that the coal slurry showed shearthinning property when viscosity was increased at high concentrations in the absence of additives. The addition of additive changed the rheological behavior from pseudoplastic to dilatant region. The presence of a high fraction of coal increased the apparent viscosity of CWS. The static stability test of all coal samples was performed using rod drop method at concentrations of 40% to 60%. The study found that stability was achieved earlier with a lower concentration of 40% as compared with higher concentrations of 50-60%. It is expected that this research would be helpful for the country facing adverse energy crises that badly affect the economy and other social aspects of human life. K E Y W O R D Scoal, coal-water slurry, viscosity, rheology, calcium lignosulfonate

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Improving stability of concentrated coal–water slurry using mixture of a natural and synthetic surfactants

Cited by 122 publications

References 70 publications

Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry

Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry

Investigation of bovine serum albumin-surfactant aggregation and its physicochemical characteristics

Rheological improvement in performance of low‐rank coal–water slurries using novel cost‐effective additives

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