Influencing factors and laws of lignite gasification in supercritical water
ZHENG Shaohua
WANG Xiaoliang
LI Mingtong
XIN li
RAN Mengjiao
CAO Dongliang
Abstract：In order to study the possibility of lignite liquefaction and gaslization in SCW ( supercritical water ) and its influencing factors, lignite liquefaction experiments were carried out under the conditions of different catalysts , temperature and particle size of coal samples.The results show that a certain amount of oil could be produced when lignite was liquefacted in the state of SCW when the temperature reached super point , the reaction of liquefaction speed up significantly , and the conversion rate goes up from 15.84%to 94.64%and output of oil was only 3.36 ml, 2.69 g.The conversion rate is 12.78%.Catalyst KOH made the conversion rate of lignite into gases or liquids reach the highest level of 94.64%.But the oil transforming rate of lignite was as low as 12.78%.When lignite particle size at 0.9~2.0 mm with catalyst K2CO3, the oil produced was 8.01ml, 6.41g, and the conversion rate was 30.48%.The bigger coal sample particle is , the smaller the conversion rate is and higher oil yield is.So un-der the state of supercritical water , the lignite particle size at 0.9~2.0 mm with catalyst K2 CO3 is the best way to convert lignite into oils.
Keywords：supercritical waterligniteliquefactionparticle sizecatalysts
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 39-43 )