Paulownia for Heating

Paulownia can be used for production of firewood for house and greenhouse heating; pellets; and bio ethanol, because of the following advantages:

  • It can be cultivated on poor sandy soil, not using the fertile soil necessary for other crops.
  • Paulownia plantation does not require special care, which decreases costs.
  • It does not require re-planting. After being cut down the tree would regenerate. The root system can survive over 70 years which is 4 to 9 growth cycles after cutting, 8 years each.
  • The trunk can be chopped off at any time of year regardless of the season or short period of harvesting, unlike other tree species.

When cultivated for firewood, 1000 Paulownia trees are to be planted on the lot of 10000 square meters (1 hectare). When pruning one-year old saplings in autumn, up to 7 kilograms of dried mass can be produced from each tree, therefore 7000 kilograms of dried mass can be derived from 1 hectare! It would help a family save money on fuel for house and farm heating.

In spring the root system gives new plant(s), which reach the same height. Thereby, annual trees can be grown without re-planting for about 15 years.

 

Fuel analysis

Fuel

Humidity (%)

Ash (%)

Volatile loss (%)

Energy value (Mega joule/kilogram)

Coal

2.83

20.08

28.33

34

Paulownia

7.74±1.65

2.63±0.87

68.68±0.36

22.96±0.17

Poplar

7.91

5.28

74.04

18.57

 

Another possible application of Paulownia its production of bio ethanol. American scientists designed a new ethanol synthesis technology, based on both thermo-chemical and biotechnological methods, which gives 511 liters of ethanol from one ton of dried wood. That’s why Paulownia is called an “oil well” tree.