Effect of precarbonization temperature on liquefaction of lignites

✍ Scribed by Koji Ouchi; Kazuro Shiraishi; Hironori Itoh; Masataka Makabe

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 244 KB
• Volume: 60
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(81)90105-8

✦ Synopsis

Soya Koishi and North Dakota lignites were precarbonized at 350,400 and 420°C to reduce the oxygen content prior to hydrogenation at 400°C under an initial hydrogen pressure of 10 MPa for 1 h. After hydrogenation, the solubility in tetralin and benzene remained almost constant to the precarbonization temperature of 420°C for Soya Koishi lignite and 400°C for North Dakota lignite. The hydrogen consumption decreased by w 25% for the former and by -50% for the latter. The hydrogen content also decreased by precarbonization which increased the tetralin-insoluble fraction.