What is the difference between the direct liquefaction of devulcanized coal and that of raw coal?
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This post was last edited by jordan569 on 2013-1-6 22:41. What is the difference between the direct liquefaction of devulcanized coal and that of raw coal? I’ve searched extensively, but couldn’t find any literature related to this topic. Therefore, let’s discuss it! This post was last edited by Zhenzhenyouci on March 9, 2009, at 08:18. Note: $ # $ $
Let me share my personal opinion: devulcanized coal is coal from which some inorganic substances have been removed, resulting in an increased content of carbon, hydrogen, and oxygen in it. This should improve the utilization rate of coal, enhance the liquefaction effect, reduce the amount of residue, and at the same time minimize equipment wear! This post was last edited by anship1984 on 2009-3-8 15:54.]
The HCl+HF pickling method that we usually use seems to be able to remove most of the ash. Last edited by firefox1981 on 2009-3-9 10:21.]
It’s good to wash it away, but we still need to find a way to remove the introduced anions
Delignification is merely the removal of minerals from coal to improve its liquefaction efficiency; it does not cause any fundamental changes in the hydrogen, carbon, and oxygen content of the coal. But there are no cheap and viable decalcification techniques available at the moment
Deactivation can reduce equipment wear