Development and evaluation of polycarboxylic acid hyper-dispersant used to prepare high-concentrated coal–water slurry

Zhou, Mingsong; Huang, Kai; Yang, Dongjie; Qiu, Xueqing

doi:10.1016/j.powtec.2012.06.030

Cited by 51 publications

(14 citation statements)

References 13 publications

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“…On the basis of the pretreatment of coal reported by Qiu et al [19], the pretreatment of the coal is as follows: firstly, the coal was crushed in a jaw crusher to obtain coal particle below 10 mm, then the coal particles were dried under vacuum at 105 8C for 24 h. The crushed dry coal was comminuted in the ball mill (dry grinding) for 40 min or 3 h. Then, the obtained coal powder was screened through a 70-mesh (0.212 mm) or 100-mesh (0.150 mm) screener, respectively. The two powders with different particle size distribution were mixed according to 1:1 when preparing CWS.…”

Section: Alkali Lignin Dispersant and Coalmentioning

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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102

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Section: Alkali Lignin Dispersant and Coalmentioning

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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102

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“…Such anchoring effects are so strong that the P(SS- co -AA- co -DMDAAC) molecules are adsorbed intensely on the coal surface. Moreover, the COO − groups could combine with metal cations through stable chelate adsorption [ 16 , 30 ], which is also beneficial to adsorption. Consequently, P(SS- co -AA- co -DMDAAC) exhibits superior wetting and adsorbance ability.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, copolymers that simultaneously bear various functional groups (such as carboxyl and sulfonic groups) have been developed for use as a novel dispersant for CWS. For instance, various polycarboxylate dispersants with different structures and chemical composition have been reported [ 14 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a novel amphoteric copolymer and its application as a dispersant for coal water slurry preparation

Zhang

Yang

et al. 2021

R. Soc. open sci.

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In this work, a novel amphoteric copolymer named Poly(sodium p-styrenesulfonate– co -acrylic acid- co -diallyldimethylammonium chloride) (P(SS- co -AA- co -DMDAAC)) was synthesized via free radical polymerization. Afterwards, P(SS- co -AA- co -DMDAAC) was explored for use as a dispersant in coal water slurry (CWS) preparation. The structure of P(SS- co -AA- co -DMDAAC) was verified by Fourier transform infrared spectroscopy and nuclear magnetic resonance. The synthetic conditions were optimized as the feed ratio of AA to SS was 1 : 1 (for Yulin coal) or 1.5 : 1 (for Yili coal), and DMDAAC dosage was 4.0 wt% (for Yulin coal) and 6.0 wt% (for Yili coal) toward total monomers. The performances of P(SS- co -AA- co -DMDAAC) as a dispersant for CWS were evaluated by various technologies, such as apparent viscosity, zeta potential, static stability and contact angle measurements. The results revealed that the optimized dosage of P(SS- co -AA- co -DMDAAC) in CWS preparation was 0.3 and 0.4 wt% for Yulin coal and Yili coal respectively. In this optimum condition, CWS prepared using P(SS- co -AA- co -DMDAAC) as dispersant showed a typical shear thinning behaviour and excellent stability, which are desired in industries. The rheological models also confirmed the pseudo-plastic characteristics of CWS. Finally, compared with the widely used anionic dispersant naphthalene sulphonate formaldehyde condensate (NSF) and poly(sodium p-styrenesulfonate) (PSS), P(SS- co -AA- co -DMDAAC) developed in this work exhibited better slurry making performance. The introduction of cationic functional groups promoted the adsorption of the dispersant, which further enhanced the electrostatic repulsion and steric hindrance among coal particles. Accordingly, the viscosity of CWS decreased and static stability enhanced.

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“…Between them, the dispersant modification is to improve the dispersibility by adding certain dispersant to CB. This procedure is regarded as a simple and convenient method and does not cost much, but the dispersant is susceptible to fall off the textile surface [18][19][20]. The polymer modification is mainly to graft water-soluble and reactive groups on the surface of CB.…”

Section: Introductionmentioning

confidence: 99%

Cotton Fabric Dyed with Self‐Dispersive and Reactive Nanocarbon Black for Enhanced Static Resistance and UV Protection

Tian

et al. 2022

Journal of Nanomaterials

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Amino functionalized nanocarbon black (CB/KH550) was prepared in reaction between KH550 and nanocarbon black (CB). 2-(4-(4,6-dichloro-1,3,5-triazin-2-ylamino)phenylsulfonyl)ethyl) sodium sulfate (SDTES) was synthesized and characterized. Self-dispersive and reactive nanocarbon black (CB/KH550/SDTES) was prepared by nucleophile substitution reaction and characterized by FTIR, TEM, zeta potential, and TG analysis. Cotton fabric was dyed with CB/KH550/SDTES by dip-dyeing method and was observed by SEM. Moreover, color depth, static resistance, UV protection, tensile property, and rub fastness of cotton fabric were measured and analyzed. Results showed that CB/KH550/SDTES demonstrated excellent dispersion stability. The dyed cotton fabric possessed adorable antiultraviolet and antistatic properties. The preparation mechanism of the cotton fabric dyed with CB/KH550/SDTES was proposed.

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Development and evaluation of polycarboxylic acid hyper-dispersant used to prepare high-concentrated coal–water slurry

Cited by 51 publications

References 13 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

Synthesis of a novel amphoteric copolymer and its application as a dispersant for coal water slurry preparation

Cotton Fabric Dyed with Self‐Dispersive and Reactive Nanocarbon Black for Enhanced Static Resistance and UV Protection

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