Catalytic nitrogen release during a fixed-bed pyrolysis of model coals containing pyrrolic or pyridinic nitrogen

✍ Scribed by Zhiheng Wu; Y Sugimoto; H Kawashima

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 176 KB
• Volume: 80
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/s0016-2361(00)00085-5

✦ Synopsis

In order to study nitrogen release from different nitrogen structures during coal pyrolysis, two model coals containing pyrrolic or pyridinic nitrogen have been prepared using cellulose and phenolic nitrogen compounds. Nitrogen release during pyrolysis of the model coals without and with catalyst has been studied in a ®xed-bed reactor at 508C/min up to 10008C. The pyrolysis results show that HCN rather than NH 3 is formed from the decomposition of pyrrolic and pyridinic nitrogen, and iron catalyst is effective on nitrogen removal for pyrrolic and pyridinic nitrogen. It is especially noteworthy that calcium catalyst also promotes nitrogen removal signi®cantly from both pyrrolic and pyridinic nitrogen.