Conceptual design and simulation study of a co-gasification technology

• Published in: Energy conversion and management 2006-07, Vol.47 (11), p.1416-1428
• Main Authors: Yuehong, Zhao, Hao, Wen, Zhihong, Xu
• Format: Article
• Language: English
• Subjects: Applied sciences; ASPEN Plus; Blast furnace; Co-gasification; Energy; Exact sciences and technology; Fuel processing. Carbochemistry and petrochemistry; Fuels; Gasifier; Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2005.08.024

As a promising clean coal technology, co-gasification has been extensively investigated. In this paper, a new co-gasification technology and a conceptually designed gasifier for such technology are proposed. The distinct advantages of this technology are its fuel flexibility and the availability to establish the gasifier by reconstructing a blast furnace or similar shaft furnace. Based on the idea of the new co-gasification technology, process modeling is conducted using the ASPEN Plus process simulator. By comparison with the laboratory scale experimental measurements on the co-gasification process, it is shown that the developed model reasonably describes the thermodynamic features of the co-gasification process and, thus, provides a useful tool for the analysis of this process. The obtained results also demonstrate that the co-gasification process provides an ideal thermodynamic condition for the co-gasification reactions and can operate at a quasi-equilibrium condition without employing catalysts at 1273 K. Lastly, the effects of changes of oxygen, steam and natural gas in the feedstock on the co-gasification process are studied by sensitivity analysis using the developed model.