Research progress of direct coal liquefaction reaction mechanism
LIU Min
SHI Shidong
QU Sijian
LIU Lilin
SHENG Ming
Abstract：The process of direct coal liquefaction was introduced in order to investigate the reaction mechanism theories.The processes of swelling,coal pyrolysis,hydrogen-donor solvent pyrolysis,H2 dissolution and activation,reaction among free radicals were analyzed.The re-sults showed that,the free radicals concentration almost reached maximum when the pyrolysis time was shorter than 10 minutes during a suitable temperature range.The reaction activity of free radical from highest to lowest in sequence was from coal pyrolysis,hydrogen-donor solvent and H2 .The reaction between H2 and free radical was the key factor of H/C ratio of liquefaction product.Based on the analysis of reaction mechanism,the reaction mechanism between H2 and free radical under different catalyst should be further clarified.Developing high active catalysts condition,lowering reaction temperature and pressure was a further research direction for coal direct liquefaction.
Keywords：direct coal liquefactionreaction mechanismhydrogen-donor solventH2 mass transfer process
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 49-54 )