EFFECTS OF ORGANIC SULFUR-CONTENT ON THERMOLYSIS AND HYDROGENOLYSIS OF LIGNITES

作     者：GARCIA, AB SCHOBERT, HH 

作者机构：Fuel Science Program Department of Materials Science and Engineering The Pennsylvania State University University Park PA 16802 U.S.A. 

出 版 物：《FUEL PROCESSING TECHNOLOGY》 (燃料加工技术)

年 卷 期：1990年第24卷第C期

页      面：179-185页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：Pennsylvania State University, PSU Consejo Superior de Investigaciones Científicas, CSIC 

主　　题：Lignite 

摘      要：The reactions of lignites were investigated in nitrogen and hydrogen atmospheres in the absence of hydrogen donor solvent. Three lignites were chosen on the basis of widely differing contents of organic sulfur: Hagel (U. S. A.), 0.79%; Cayhiran (Turkish), 4.85%; and Mequinenza (Spanish), 11.3%. Reaction conditions were 275°C, 6.9 MPa gas pressure for 30 minutes. In the absence of a hydrogenation catalyst the conversions and liquid yields for a given lignite were the same regardless of the atmosphere. For the three lignites, the liquid yields correlated with the organic sulfur content. For catalytic hydrogenation, the lignites were impregnated with ammonium tetrathiomolybdate. In this case, higher conversions and liquid yields were obtained in a hydrogen atmosphere than in nitrogen. Both the absolute values of the liquid yields and the increase in yield in a hydrogen atmosphere relative to nitrogen correlated with the organic sulfur content. These results suggest that the thermolysis of relatively weak CS bonds is important in disrupting the macromolecular structure of these lignites, and that in the absence of solvent a dispersed catalyst is important in facilitating hydrogenolysis.