Harper International has been selected to provide an advanced high-temperature furnace system for the manufacture of energy storage materials for EnerG2, a Seattle, Wash.-based company focused exclusively on the development and production of advanced carbons for energy storage devices. The system will be utilized for pyrolysis of activated carbon for ultracapacitors. Harper’s furnace design enables EnerG2’s unique requirement of producing very high-purity material at temperatures to 1100°C. The rotary system will eventually be in use at EnerG2’s new facility in Oregon, which is dedicated to the commercial-scale production of synthetic high-performance carbon electrode material.           

Metallic impurities in EnerG2’s material are unacceptable as they could affect charge storage ability. The high temperatures and purity specifications necessitate exacting control of gas particle interactions. As such, Harper engineered the multi-line rotary system with specialty construction materials inclusive of a ceramic-lined process area to meet the purity conditions and balanced the need for a gas-tight operation on the nitrogen atmosphere through its proprietary sealing technology.