Studies on the Liquefaction of Coal with Carbon Monoxide and Water

Abstract

High pressure differential thermal analysis was applied to the studies of lipuefaction of coal with carbon monoxide and water. Nine saamples of coal with different oxygen content were selected. Analyses of produced gas, separation of products by organic solvents and measurements of oxygen content were subsequently carried out. On the basis of these experimental results, the following conclusions were obtained.(1) In the course of the coal liquefaction reaction, organic water solubles such as alcohol and carbonic acid were produced by the interaction of hydrogen and carbon monoxide which was first produced by shift reaction.(2) According to the high pressure differential thermal analysis, it became clear that coal liquefaction reaction proceeded readily with the increase of oxygen content of samples and this agreed well with the results of the conversion.(3) In the case of samples with an oxygen content over 20%, it was ascertained that coal liquefaction reaction with carbon monoxide and water proceeded more readily than liquefaction with hydrogen.(4) In addition to these desults, it was noted that the amount of water after the reaction was less than the initial amount and a larger amount carbon dioxide was seen as compared with that of hydrogen was evolved. In addition the oxygen content of the reaction products were remarkably less than that of the original samples.(5) On the basis of these results, with regard to the reaction mechanism for coal liquefaction with carbon monoxide and water, it may be surmized that initially hydrogen evolved by shift reaction made a high concentrated or selective attack on oxygen bonds as compared against high pressure hydrogen and as a result the liquefaction and deoxidation reaction proceeded smoothly.