Thermal decomposition of arsine, a lewisite detoxification by-product

We developed the physicochemical principles of the thermal decomposition of arsine resulting from the electrochemical reduction of the products of lewisite detoxification by alkaline hydrolysis. The thermodynamic and kinetic parameters of the thermal dissociation of arsine were calculated for the temperature range of practical interest in order to minimize the arsine concentration in the effluent gas. A process was proposed and tested for processing lewisite detoxification products which includes the thermal decomposition of arsine. The resultant arsenic is 99.9999% pure. Based on the scientific and technological foundations of arsine pyrolysis, we designed a system for the thermal decomposition of arsine, which was integrated into a lewisite detoxification process.