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合成气气氛下含水量对锡林浩特煤液化性能的影响
冯婉璐,吴诗勇,尤全,吴幼青,郑化安,闵小建
0
(华东理工大学能源化工系, 上海 200237;华东理工大学能源化工系, 上海 200237;华东理工大学煤气化及能源化工教育部重点实验室, 上海 200237;陕西煤业化工技术研究院有限责任公司, 西安 710070)
摘要:
在合成气气氛下考察了含水量对锡林浩特煤液化性能的影响。结果表明:在合成气气氛下,煤中适当含水可促进煤在液化过程中的转化。当含水量为7.5%(质量分数)时,锡林浩特煤的液化转化率最高,为84.59%;当煤中含水量较高时,煤的转化率明显降低。此外,煤中适当含水更有利于水煤气变换反应的进行。当含水量为7.5%时,合成气中的CO转化率最高,为26.00%;但随着煤中含水量的增加,CO转化率降至16.93%。通过沥青烯与前沥青烯的红外光谱发现:沥青质中存在大量羟基,煤中的水促进了煤中官能团侧链断裂;但当煤中含水量大于15.0%时,沥青质发生缩聚反应导致煤的液化产率有所降低。
关键词:  锡林浩特煤  煤直接液化  合成气气氛  含水量  水煤气变换反应
DOI:10.14135/j.cnki.1006-3080.2017.02.002
投稿时间:2016-09-13
基金项目:国家自然科学基金(21476079,21476080);中央高校基本科研业务费专项资金(WB1414014)
Effect of Moisture Amount on Liquefaction of Xilinhaote Coal under Syngas
FENG Wan-lu,WU Shi-yong,YOU Quan,WU You-qing,ZHENG Hua-an,MIN Xiao-jian
(Department of Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;Department of Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;Shaanxi Coal and Chemical Technology Institute Co. Ltd, Xi'an 710070, China)
Abstract:
The effect of moisture amount on the liquefaction behaviors of Xilinhaote coal under syngas was investigated.The results indicated that the conversion of coal was evidently improved with an appropriate amount of moisture under syngas.The highest conversion (84.59%) was achieved with the moisture of 7.5% (mass fraction).However,the conversion decreased significantly upon increasing the amount of moisture.Moreover,an appropriate amount of moisture was favorable for the water-gas shift reaction,which promoted the conversion of coal.The highest conversion of CO reached 26.00% when the moisture was 7.5%.With the increase of moisture,the conversion of CO reduced to 16.93%.FT-IR spectra indicated that the asphaltenes and preasphaltenes were abundant with hydroxy.The moisture in coal was considered to cause the cleavage of functional groups of side chains in coal.However,the polycondensation of asphaltenes took place in case of the increased moisture (>15.0%),thus reduced the yield of coal liquefaction.
Key words:  Xilinhaote coal  direct coal liquefaction  syngas  moisture  water-gas shift reaction

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