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Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite

机译：胜利褐煤超临界乙醇脱氧实验研究

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In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.
机译：本研究采用超临界乙醇法去除褐煤中的含氧官能团，系统地研究了温度，停留时间和乙醇/煤质量比对脱氧的影响。具体地，通过FT-IR和GC / MS表征超临界乙醇脱氧后的固体和液体产物。考虑到脱氧率（61.40％）和固体收率（89.62％），在270°C停留时间为90分钟，醇/煤质量比为5：1时达到了最佳脱氧效果。在220℃下产生的液体产物中，芳族化合物的含量为约80％，而苯酚和酯化合物的含量小于5％。然而，对于在270℃下获得的液体产物，芳族化合物的含量减少了31.69％，而含O化合物的体积分数增加了2.81％，并且酚和酯化合物的含量增加至约35％。 。在超临界乙醇过程中，醚氧键断裂。对于产品中的含O物质，苯酚及其衍生物是固体产品的主要成分，而液体产品中的酯（主要是乙酯）是主要成分。

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