【摘要】 对煤中硫在还原性气氛下热解的迁移规律进行了实验研究.以一种中硫煤为研究对象,在一套常压固定床反应器上进行程序升温实验,热解产物在高温下与净化的空气混合后并充分燃烧,经由溶液吸收进行电解滴定,得到实验过程煤中硫的连续释出规律曲线.实验结果表明,煤中硫在H2气氛下的释出比例比在N2气氛下的释出比例要高,H2气氛下的释出比例为71.9%,N2气氛下的释出比例为32.8%.引起两者释出比例差异的主要原因是:在高于500℃的高温条件下,H2能够与煤(煤半焦)中的硫进行反应,而在N2气氛下煤(煤半焦)中的硫却不能随温度的升高而进一步释出.更多还原

【Abstract】 The migration of sulfur and the coal reductive pyrolysis was studied used a fixed-bed reactor.First,coal sample was holding in the quartz reactor undergoing the temperature program pyrolysis.The product was mixed with the purify air and burnt under the high temperature,then be absorpted by the acidic solution for the coulometric titration.Therefore a continuous release curve of sulfur in coal under the reductive pyrolysis was obtained.Experimental results show that the release proportion of sulfur in coal in the atmosphere of H2 was higher than that in the atmosphere of N2,the release proportion of sulfur were 71.9% and 32.8% respectively at the atmosphere of H2 and N2.Mainly reason for the difference each other is caused by:when the temperature is over 500 ℃,H2 can react with sulfur in coal(semi-coke),but the atmosphere of N2 can not further react with the sulfur in coal(semi-coke)at this temperature.更多还原