稳定剂对COM燃料流动性的影响

ＣＯＭ(油煤混合燃料 )燃料是将煤粉分散在燃油中 ,加入稳定剂制得的一种流体燃料。由于使用方便、热值高、价格便宜。因此 ,作为廉价的石油替代品具有广阔的用途。ＣＯＭ燃料的质量指标主要有 :稳定性、流动性、碳含量的高低。前文已讨论了稳定剂结构对ＣＯＭ稳定性的影响1] ,至于影响ＣＯＭ流动性的主要因素 ,至今文献报道的很少。中昭广、杉山浩等较详细地讨论了多支链高分子量非离子型表面活性剂对水煤浆 (ＣＷＳ)流动性的影响2 ] 。他们的研究结果表明 :稳定剂的支链越多、分子量又较大时 ,ＣＷＳ的流动性就越好。本文以多元醇 -ＰＯ…

EFFECTS OF STABILIZING AGENT ON FLUIDITY IN COAL-OIL MIXTURE

Synthesis of stabilizing agents-methanol-epoxy propane(PO)-ethylene oxide(EO), glycerine-PO-EO, diglycerol-PO-EO,sorbierite-PO-EO,hexahydroxymethylmelamine-PO-EO additives was described and effects of number and molecular weight of branched chains, molar ratio of PO and EO, crosslink density of stabilizing agents on fluidity in coal-oil mixture (COM) were discussed in this article. When PO:EO is equal to 2, molecular weight above 5000, the stabilizing agent having suitable crosslink density with more branched chains gives better fluidity in COM. For hexahydroxymethyl melamine-PO-EO additive, when condensation of hexahydroxymethyl melamine in performed at pH=4.5 for 10min, copolymerization with PO and EO, and cross linking of copolymer by TDI to get polymer with MW 2 times higher than the copolymer, the maximum coal loading of 66% in COM can be reached.