Beechwood processed at different temperatures. From left to right: 200 °C, 190 °C, untreatedcomparison European Ash, left= untreated, right= thermally modifiedwood surface, thermally modified European Ash wood
Thermally modified wood is wood that has been modified by a controlled pyrolysis process of wood being heated to (> 180 °C) in an oxygen free atmosphere. This process changes to the chemical structures of wood's cell wall components lignin, cellulose and hemicellulose which increases its durability.[1] Low oxygen content prevents the wood from burning at these high temperatures. Several different technologies are introduced using different media including nitrogen gas, steam and hot oil.
^"What is Thermally Modified Wood?". Hardwood Distributors Association. 2015-07-28. Archived from the original on 2019-09-18. Retrieved 2019-09-13.
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