Torrefied Wood


For a good overview of the torrefaction process please see: Biomass Refinement by Torrefaction 

Follow links below to learn more about Torrefied Wood.

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I compiled this information during the years I "researched torrefaction" & renewed interest in Torrefied Wood.  
There is currently a great deal of info available on line.  Just Google Torrefied Wood.

Here is one report I found particularly interesting: CMI-Nesa 

A Multi Hearth Furnace works fine for making charcoal but may be too costly for producing Torrefied Wood.  
The Wyssmont TURBO operates in a similar manner and would cost substantially less than a MHF.

A few other recent publications.

bulletTorrefied Biomass: An Ideal Co-Firing Solution

bulletCombustion evaluation of torrefied wood pellets

bullettorrefied-wood-a-bio-energy-option-that-is-ready-to-go

Metrics and unit cost estimates being presented in this article were developed from data provided by several torrefaction technology providers.

The following are some of the key estimates that had been derived:
bulletThe costs of acquiring and harvesting and chipping forest residue and pre-commercial thinnings from softwood timberland acreage in South Carolina are expected to range between $22.50/gt and $26/gt and average ~$24.25/gt.
bulletThe added cost to transport, clean and dry these green wood chips is expected to increase their value to  ~$55/dt.
bulletTorrefaction of dry chips is expected to results in a 20% loss of weight thereby increasing the cost of wood waste used to ~$69/ short ton (st).
bulletThe cost of torrefying woody biomass is expected to add ~$5/st.
bulletThe BTU content of TW is estimated to be 11,000/st compared to coal that has ~12,000 BTUs/st.
bulletTW is expected to cost ~$80.27, after adjusting to reflect these BTU differentials.

This cost compares favorably to the ~$100/st price of coal now being delivered to industrial plants in South Carolina.

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