A new physical process for desulfurization of low-rank coals

✍ Scribed by M.S Çelik; I Yildirim

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 82 KB
• Volume: 79
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/s0016-2361(00)00013-2

✦ Synopsis

A processing route involving low temperature carbonization followed by dry magnetic separation is put forward for the desulfurization and deashing of typical low-rank lignitic coals. The 23 mm lignite samples were subjected to low temperature carbonization at 6008C for 15 min and then upgraded by magnetic separation. Under optimum conditions, a remarkable decrease in both ash and more importantly in total and particularly organic sulfur was achieved. A systematic study of the mechanism of the sulfur removal together with the literature ®ndings reveals the formation of an iron±sulfur coordination compound in coal.