The design and characterization of a 1200thinsp;deg;C flow reactor for studying noncatalytic, gas/solid reactions are presented. The reactor system is designed for highhyphen;temperature, isothermal operation in a developing, laminar flow regime. The process gas is raised to the reaction temperature by flowing through a tubular preheat furnace fitted with sequential alumina honeycombs for increased convective and radiative surface area. The preheat furnace eliminates typical use of a flame burner to reach these high temperatures, thereby preventing the existence of combustion gases that may affect the reaction of interest. The reactive solid is introduced into the flow reactor by a waterhyphen;cooled injection probe. Reacted solids are collected by a stainlesshyphen;steel, waterhyphen;cooled probe capable of axial movement. Solids residence times can be varied between sim;50 and 250 ms, dependent upon process gas flow rate and collection probe height in the reactor. Sample results are presented for the calcium oxide/sulfur dioxide (CaO/SO2) reaction at varying times and temperatures.
展开▼
