Co-liquefaction of lignite and sawdust under syngas
Co-liquefaction of lignite and sawdust under syngas
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合成气下褐煤和锯末的共液化
DOI：
10.1016/j.fuproc.2010.09.014
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发表时间：
2011-01-01
影响因子：
7.5
通讯作者：
Li, Wen
中科院分区：
文献类型：
--
作者：
Guo, Zhenxing;Bai, Zongqing;Li, Wen
在高压反应釜中进行了褐煤和木屑的单独液化和共液化反应，研究了反应温度、初始压力、反应时间以及溶剂与煤和生物质的配比对产物分布的影响。木屑比褐煤更易液化，木屑的加入促进了褐煤的液化。在CLLS过程中存在一定的正协同效应。在所考察的实验条件范围内，CLLS的油产率随反应温度、反应时间（10-30 min）和溶剂/原料比（0-3）的增加而增加，但随合成气初始压力的增加变化不大。因此，总转化率、前沥青质和沥青质（PA + A）和气体的产率随液化操作条件的不同而变化。气体产物主要是CO和CO2，具有少量C1-C4组分。在CLLS过程中，合成气可以替代纯氢。实验结果表明，CLLS的最佳操作条件为：合成气、温度360 ℃、初始冷压3.5MPa、反应时间30 min、溶剂与煤和木屑的比例为3：1。在共液化过程中，合成气中的CO与煤和木屑水分中的H2O发生水煤气变换反应，生成活性氢，提高了液化转化率，降低了氢耗。(C)2010年爱思唯尔。All rights reserved.
Individual and co-liquefaction of lignite and sawdust (CLLS) under syngas was performed in an autoclave and the effects of temperature, initial syngas pressure, reaction time and ratio of solvent to coal and biomass on the product distribution of CLLS were studied. Sawdust is easier to be liquefied than lignite and the addition of sawdust promotes the liquefaction of lignite. There is some positive synergetic effect during CLLS. In the range of the experimental conditions investigated, the oil yield of CLLS increases with the increase of temperature, reaction time (10-30 min) and the ratio of the solvent to the feedstock (0-3), but varies little with the increase of initial syngas pressure. Accordingly, the total conversion, the yield of preasphaltene and asphaltene (PA + A) and gas, changes by the difference in operation conditions of liquefaction. The gas products are mainly CO and CO2 with a few C-1-C-4 components. The syngas can replace the pure hydrogen during CLLS. The optimized operation conditions in the present work for CLLS are as follows: syngas, temperature 360 degrees C, initial cold pressure 3.5 MPa, reaction time 30 min, the ratio of solvent to coal and sawdust 3:1. Water gas shift reaction occurs between CO in the syngas and H2O from coal and sawdust moisture during the co-liquefaction, producing the active hydrogen which increases the conversion of liquefaction and decreases the hydrogen consumption. (C) 2010 Elsevier By. All rights reserved.