Potential of producing hydrogen and high Btu gas from steam gasification of lignins
Generally, lignins are considered as a waste product from the pulp and paper industry. In this work, the authors have attempted to convert a number of lignins to hydrogen and high Btu gas by gasifying them with steam. Steam gasification of three lignins, namely, Kraft-1, Kraft-2 and Alcell was carried out in a fixed bed reactor in the temperature range 600--800 C. The steam flow rate was 10 g/h/g of lignin. As expected, lignin conversion was highest at 800 C and followed the order Kraft-1 {gt} Kraft-2 {gt} Alcell. The product gas consisted of H{sub 2}, CO, CO{sub 2}, and CH{sub 4}, C{sub 2} and C{sub 3+} hydrocarbons. The Btu value of the product gas ranged between 450--850 Btu/scf. It was interesting to observe that the H{sub 2} content was fairly high and ranged between 30--50 mol% of the product gas mixture. In addition, the effect of steam flow rate (5--15 g/h/g of lignin) was also studied at a fixed temperature of 800 C. It was interesting to observe that at high steam flow rates, the lignin conversion increased and the process resulted in high selectivity for CH{sub 4}. All these three lignins have been thoroughly characterized. A comparison of these results with results obtained from steam gasification of biomass-derived chars will also be presented.
- Research Organization:
- Univ. of Saskatchewan, Saskatoon (CA)
- OSTI ID:
- 20002716
- Resource Relation:
- Conference: 33rd Intersociety Energy Conversion Engineering Conference, Colorado Springs, CO (US), 08/02/1998--08/06/1998; Other Information: 1 CD-ROM. Operating system required: Windows 3.x; Windows 95/NT; Macintosh; UNIX. All systems need 2X CD-ROM drive.; PBD: 1998; Related Information: In: Proceedings of the 33. intersociety energy conversion engineering conference, by Anghaie, S. [ed.], [2800] pages.
- Country of Publication:
- United States
- Language:
- English
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