From Biomass Magazine – July 22, 2009
Torrefaction technology development company Agri-Tech Producers LLC has selected South Carolina-based Kusters Zima Corp. as its engineering/manufacturing partner for the production of its torrefaction equipment. Agri-Tech is utilizing a technology developed at North Carolina State University in Raleigh, which the company obtained an exclusive license for in February. [The Autothermic Transportable Torrefaction Machine (ATTM) was developed by NC State forestry doctoral student, Chris Hopkins.]
During the process, woody biomass is heated to 300 to 400 degrees Celsius (572 to 752 degrees Fahrenheit), in a low-oxygen environment. The volatile organic compounds and hemicellulose, which are separated from the cellulose and lignin along with water, are combusted to generate 80 percent of the torrefaction process heat. The remaining warm lignin acts as a binder once the torrefied wood is pelletized.
The resulting fuel is dense, dry, water resistant and carbon neutral. It also has a low sulfur and mercury content, can be easily crushed and doesn’t rot.
KZC was created in the early 1970s to manufacture textile equipment, and has a production facility in Spartanburg, S.C. The company will manufacture torrefaction machines specific to each ATP customer’s needs.
Learn more about the Autothermic Transportable Torrefaction Machine