还原性气氛下煤中硫热解迁移规律 (Ⅰ)H_2和N_2气氛下煤中硫热解释出规律的比较  

MIGRATION OF SULFUR IN COAL UNDER THE REDUCTIVE PYROLYSIS PART(Ⅰ) COMPARISON OF EXPERIMENTAL RESULTS UNDER H_2 AND N_2 ATMOSPHERE

作　　者：王利花[1] 王素珍[1] 赵炜[1] 

机构地区：[1]煤科学与技术教育部和山西省重点实验室,太原理工大学,太原030024

出　　处：《煤炭转化》2009年第1期10-13,共4页Coal Conversion

基　　金：国家重点基础研究发展计划(973)项目(2005CB221202);国家自然科学基金资助项目(20676090);长江学者和创新团队发展计划项目(IRT0517)

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.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 tempera- ture program pyrolysis. The product was mixed with the purify air and burnt under the high tem- perature, then be absorpted by the acidic solution for the coulometric titration. Therefore a con- tinuou~ 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.

关 键 词：煤 还原性气氛 热解 

分 类 号：TQ530.2[化学工程—煤化学工程]