Fly ash suspensions stabilized by hydroxypropyl guar gum and xanthan gum for retarding spontaneous combustion of coal

Shi, Qi; Qin, Botao; Bi, Qiang; Bao, Qu

doi:10.1080/00102202.2018.1491845

Cited by 35 publications

(10 citation statements)

References 29 publications

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“…In order to improve the stability of fly ash mortar, Shi et al [51] mixed the guar gum (GG) derivative hydroxypropyl guar gum (HPG) and xanthan gum (XG) at a mass ratio of 1:1 to obtain the mixture (BMS). Subsequently 300 g of fly ash (FA) particles were dispersed into 1 L of BMS solution with different concentrations and stirred to obtain the mixed mortar (FAS).…”

Section: Polymer-containing Soft Matters For Coal Mine Disaster/hamentioning

confidence: 99%

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Wang

et al. 2019

Polymers

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Safe mining is the premise and guarantee of sustainable development of coal energy. Due to the combination of excellent properties of polymers and traditional soft matters, polymer-containing soft matters are playing an increasingly important role in mine disaster and hazard control. To summarize the valuable work in recent years and provide reference and inspiration for researchers in this field, this paper reviewed the recent research progress in polymer-containing soft matters with respect to mine dust control, mine fire control, mine gas control and mine roadway support. From the perspective role of polymers in a material system, we classify mine polymer-containing soft matters into two categories. The first is polymer additive materials, in which polymers are used as additives to modify fluid-like soft matters, such as dust-reducing agents (surfactant solution) and dust-suppressing foams. The second is polymer-based materials, in which polymers are used as a main component to form high performance solid-like soft matters, such as fire prevention gels, foam gels, gas hole sealing material and resin anchorage agent. The preparation principle, properties and application of these soft matters are comprehensively reviewed. Furthermore, future research directions are also suggested.

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Section: Polymer-containing Soft Matters For Coal Mine Disaster/hamentioning

confidence: 99%

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Wang

et al. 2019

Polymers

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“…[1][2][3][4] Therefore, CSC prevention is of great significance for the safe production of coal. Coal spontaneous combustion (CSC) can not only produce lots of toxic and harmful gases, but also cause casualties.…”

Section: Introductionmentioning

confidence: 99%

“…Coal spontaneous combustion (CSC) can not only produce lots of toxic and harmful gases, but also cause casualties. [1][2][3][4] Therefore, CSC prevention is of great significance for the safe production of coal. 5 Many methods have been proposed to inhibit CSC in underground coal mines.…”

Section: Introductionmentioning

confidence: 99%

Effects of ionic liquid concentration on coal low‐temperature oxidation

Cui

Jiang

Zheng

et al. 2019

Energy Science & Engineering

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In order to find out the optimal concentration of ionic liquid to lower the cost of inhibiting coal spontaneous combustion, effects of aliphatic hydrocarbons, hydrogen bonds, and some structural parameters of coal samples treated with low‐concentration ionic liquids were analyzed through Fourier‐transform infrared spectroscopy (FTIR) and temperature‐programmed experiments. Meanwhile, the changes of index gases in the heating process were observed by the temperature‐programmed method. The results show that the contents of aliphatic hydrocarbons in the treated coal samples decrease remarkably, so does the length of aliphatic chain CH2/CH3; besides, the amount of CO produced also decreases to some extent. When the mass concentration ratio is 1:10, HB‐tc, BB‐tc, AC‐tc, and BN‐tc can reduce the spatial structure and enhance the structural stability of aromatic clusters in coal. The CO concentrations of 1:2 HB‐tc and 1:10 AC‐tc are obviously lower than that of raw coal, indicating their better inhibitory effects. The inhibitory effect of HB‐tc decreases with the decrease in concentration. With the rise of temperature, the effect of concentration on the inhibition of CO production gradually weakens at 180°C and 200°C. AC‐tc achieves the optimum inhibitory effect near 1:10 mass concentration ratio.

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“…The subject of this paper, hydroxypropyl guar (HPG), which is guar reacted with propylene oxide, is more hydrophobic than guar; the propylene oxide shifts the hydrophilic–lipophilic balance (HLB), which enables more pronounced partitioning of the molecules into the oil phase in the water–oil environment . Compared with pristine guar gum, HPG is expected to display faster dissolution and greater temperature resistance, which enable applications as natural additives in detergent and coal and in the medical industry. − Guar and its derivatives are used as gellants in cross-linked fracking fluids used for the enhanced recovery of crude oil. − …”

Section: Introductionmentioning

confidence: 99%

Hydroxypropylation of Guar Splits: Kinetics and Rheology

Gao

Grady

2019

Ind. Eng. Chem. Res.

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Hydroxypropyl guar (HPG) is one of the most important derivatives of natural guar gum. In this paper, we describe the hydroxypropylation kinetics when these functional groups are added to guar splits, which are the form of guar gum typically modified in an industrial process. NMR spectroscopy was applied to quantify the amount of reacted propylene as a function of reaction time. A kinetic model was then established, enabling the derivation of a reaction rate law for the hydroxypropylation of guar. Finally, we investigated the rheological properties of aqueous-phase HPG and its cross-linked derivatives as a function of propylene content and cross-linker amount.

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Fly ash suspensions stabilized by hydroxypropyl guar gum and xanthan gum for retarding spontaneous combustion of coal

Cited by 35 publications

References 29 publications

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Effects of ionic liquid concentration on coal low‐temperature oxidation

Hydroxypropylation of Guar Splits: Kinetics and Rheology

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