โ Scribed by V.M. Fthenakis; P.D. Moskowitz
No coin nor oath required. For personal study only.
Phosphine (PH3) is a highly toxic and flammable gas used in photovoltaic cell manufacturing. Its use can present serious occupational and public health hazards if appropriate prevention and control options are not effectively implemented. This report reviews technologies for controlling PH3 emissions during routine operation and accidents, hazard prevention options, and emergency preparedness and response strategies. Routine PH3 emissions can be controlled by using carbon adsorption for very low concentrations and thermal incineration or multistage chemical scrubbing for higher concentrations. Massive accidental releases are very difficult to control and could jeopardize the life and health of persons living near a plant.
Options for preventing or minimizing accidental releases (e.g. flow-restricting valves) need to be implemented to reduce such risks. Industry and community emergency response planning can further reduce the magnitude of these hazards.
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