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Advances in the HTAG technology and process of biomass
G. R. John*, L. Wilson and C. F. Mhilu
Department of Energy Engineering, College of Engineering and
Technology, University of Dares Salaam,
P. O. Box 35131, Dar es Salaam, Tanzania.
*Corresponding author. E-mail:
grkjohn@uccmail.co.tz. Tel:
+255 754 31 99 45. Fax +255 22 2410 114.
Accepted
11 July, 2008. |
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High
Temperature Air/Steam Gasification (HTAG) is a process in
which a highly preheated air/steam is utilized as the
oxidizer. The HTAG process follows the developments in the
High Temperature Air Combustion (HiTAC), which has shown to
be superior in energy saving and pollution reduction
compared to the conventional combustion technology. The
preheated oxidizer provides additional energy into the
gasification process that enhances thermal decomposition of
the gasified solid feedstock. Consequently, the HTAG
increases both the calorific value of the producer gas, and
the cold gasification efficiency. In this work, the
advantages of the HTAG processes is presented by considering
performance influencing parameters that include materials
quality, oxidizer type, equivalence ratio (ER), gasification
temperature, and bed additives.
Key
words:
High temperature air/steam gasification (HTAG), biomass
gasification, updraft/downdraft gasifier, fluidized bed
gasifier. |
