GAS-L: Torrefied Wood (TW)

["Jim Arcate" <arcate@msn.com>]

Hello Tom Reed & Gasification:

Tom Reed you indicated interest in Torrefied Wood, perhaps you and others
can help me with this:

If we torrefy wood at ~ 270 degrees C. (by Airless Drying using superheated
steam at atmospheric pressure) typically, what volatile compounds will be
released, over what temperature ranges; in particular combustible gases that
could be used as fuel for the AD's indirect heater ?

Thank you,

Jim Arcate
Transnational Technology

Reference:  Table 1. in DEVELOPMENTS ON TORREFIED WOOD AN ALTERNATIVE TO
CHARCOAL FOR REDUCING DEFORESTATION on my web site at
http://www.techtp.com/FAO%20Paper.htm indicates ~  2,257.50  kJ of energy is
"lost" per kg of dry wood converted to TW.

This energy could be used as input to the Airless Dryer's indirect heater
for drying wood & making TW.

GCV kJ/kg:
Raw Wood (dry)  19,350.00
TW 270 C.  21,500.00
% Yield of TW 79.5%

Torrefy 1 kg of Raw Wood (dry) to make 0.795 kg TW
kJ in TW   17,092.50
Energy Lost, kJ    2,257.50  per kg of dry wood converted to TW
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