Synthesis of Starch Graft Copolymer Dispersant and its Application Performance in Coal-Water Slurry

Abstract:

Article Preview

In this study, a new starch graft copolymer dispersant for Chinese Shenhua coal-water slurry (CWS) was prepared by radical polymerization using styrene sulfonate (SSS), hydroxyethyl acrylate (HEA) and methyl acrylic acid (MAA) as graft monomers in oxidation-reduction initiator system. The apparent viscosity, static stabilization and rheology of Shenhua coal-water slurry prepared with the dispersant have been were investigated. The experimental results demonstrate that the CWS gives the minimal viscosity of 826 mPas at coal concentration of 66 wt%, dispersant dosage of 0.5 wt% and shear rate of 100 s-1. Bleeding ratio tests indicate the starch graft copolymer can stabilize the slurry. The rheological behavior of the prepared CWS can be described by the pseudo-plastic fluid model. On the basis of the above, the starch graft copolymer dispersant has broad prospect for the application for CWS.

Info:

Periodical:

Advanced Materials Research (Volumes 581-582)

Edited by:

Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen

Pages:

330-333

Citation:

G. H. Zhang et al., "Synthesis of Starch Graft Copolymer Dispersant and its Application Performance in Coal-Water Slurry", Advanced Materials Research, Vols. 581-582, pp. 330-333, 2012

Online since:

October 2012

Export:

Price:

$38.00

[1] F. Boylu, H. Dincer, G. Atesok, Effect of coal particle size distribution, volume fraction and rank on the rheology of coal-water slurries, Fuel Proces. Technol. 85 (2004) 241-250.

DOI: https://doi.org/10.1016/s0378-3820(03)00198-x

[2] T. Kakui, H. Kamiya, Effect of Sodium Aromatic Sulfonate Group in Anionic Polymer Dispersant on the Viscosity of Coal-Water Mixtures, Energy Fuels 18 (2004), 652-658.

DOI: https://doi.org/10.1021/ef030154a

[3] D. Das, S. Panigrahi, P.K. Misra, and A. Nayak, Effect of Organized Assemblies. Part 4. Formulation of Highly Concentrated Coal Water Slurry Using a Natural Surfactant, Energy Fuels 22 (2008), 1865–1872.

DOI: https://doi.org/10.1021/ef7006563

[4] W. He, C.S. Park, J.M. Norbeck, Rheological Study of Comingled Biomass and Coal Slurries with Hydrothermal Pretreatment, Energy Fuels, 23 (2009) 4763-4767.

DOI: https://doi.org/10.1021/ef9000852

[5] D. Debadutta, D. Uma, N. Amalendu, and P.K. Misra, Surface Engineering of Low Rank Indian Coals by Starch-Based Additives for the Formulation of Concentrated Coal-Water Slurry, Energy Fuels. 24 (2010), 1260-1268.

DOI: https://doi.org/10.1021/ef900921c

[6] F. Boylu, H. Dincer, G. Atesok, Effect of coal particle size distribution, volume fraction and rank on the rheology of coal-water slurries, Fuel Proces. Technol. 85 (2004) 241-250.

DOI: https://doi.org/10.1016/s0378-3820(03)00198-x

[7] Z.J. Zhou, X. Li, J. M Liang, J. Z Liu, J.H. Zhou, and K.F. Cen, Surface Coating Improves Coal-Water Slurry Formation of Shangwan Coal, Energy Fuels. 25 (2011), 3590–3597.

DOI: https://doi.org/10.1021/ef200529h