Step 3 : Drying and Torrefaction
During this process the raw feedstock is dried and torrefied to prepare it for the pyrolysis reactor. The purpose of the drying process is to remove moisture to a required level by introducing hot gas at a temperature range of 100˚ C to 280˚C where carbonisation does not take place. The hydro-carbonaceous gas released in this process is distilled and collected as a condensable liquid commonly known as wood vinegar. Wood vinegar is also the main marketable by-product suitable for applications into human health, animal health, soil- and plant nutrition and health. Liquid tar is also collected as a lesser by-product.