煤中有机硫的电化学脱除研究

煤的电化学脱硫是70年代末Coughglin和Fa rooque开发的一种温和脱硫方法,它不但克服了传统的高温、高压的脱硫缺点,而且可以联产氢气,从而大大降低了生产成本1,2]。虽然近年来国内外对煤的电化学脱硫研究有些报道3～6],但是脱硫效果都不理想,全硫脱硫率都在50%左右。作者在煤的电化学脱硫研究中发现有机硫的脱除较无机硫困难7]。目前国内关于煤中有机硫的电化学脱除程度及影响规律的研究未见报道。为此,本文以川南贫瘦煤为原料,采用化学法脱除其中的无机硫后作实验煤样,研究了酸性体系中有机硫的脱除规律。1　试验部分1 1　原料与试…

ORGANIC SULPHUR REMOVAL FROM COAL BY ELECTROLYSIS

Nanchuan lean coal in which inorganic sulphur had been removed was used to investigate the effect of electrolysis conditions on organic sulphur removal from coal. The results indicated that the amount of sulfur removed in creases with time, but the removal rate becomes slower. When the concentration of HCl is lower than 3.2 M, the sulfur removal changes little; when it is 3.2 M～4.8 M, the sulfur removal is improved significantly. The higher concentration of coal slurry, the lower the sulfur removal rate. The desulfrization of organic sulphur is 18% for 0.05g/mL coal slurry in 10 h in acidic medium. Therefore, organic sulphur is more difficult to be removed than inorganic sulphur by electrolysis.