The raw materials used in our experiments were short rotation
coppice willow WC supplied by Renewable Energy Suppliers
Ltd (Retford, UK; Koolfuel 15). The properties of the feedstock
are shown in Table 1. The feedstock was used as received,
without any additional preprocessing. Koolfuel 15 has an average
particle size of 25 9 15 9 10 mm with a wide distribution