Research status and development trend of modified lignin additives for coal water mixture
ZENG Mei
DAI Aijun
ZHAO Meng
DU Yanxue
GE Qiming
Abstract：To improve the stability and dispersion of lignin additive,the separation,purification,distribution and chemical modification methods were used to modify lignin.Discussed the advantages and disadvantages of the methods,mainly analyzed four chemical modification methods which were oxidation,sulfonation,condensation,graft copolymerization. Finally,the trends of development of lignin modified coal water mixture additives were prospected. The results show that separation-purification technology,compound technology which have no effects on the surface adsorption of coal,can not change the structure and surface properties of lignin.The above two methods also lack mar-ket competitiveness because of high cost.The chemical modification method by introducing favorable functional groups or removing unfavor-able functional groups in the lignin molecules,changes the molecular structure,improves disperstiveness,and modified product prepares coal water mixture with excellent performance.The reaction characteristics of lignin should be adjusted based on the coal properties.A series of additives can be compounded by controlling the reaction process.So the usable range of lignin can be expanded.
Keywords：lignincoal water mixtureadditiveseparation-purificationcompound technologychemical modification
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 49-52 )