Adsorption of Phosphine in Yellow Phosphorus Tail Gas by Impregnated Activated Carbon

Phosphine (PH₃) is one of highly toxic air pollutants, commonly produced in phosphorous chemical industry. In order to utilize high concentration CO in yellow phosphorus tail gas, metals (Cu, Fe and Ce) loaded activated carbon adsorbents were prepared for the adsorption of PH₃ in this study. The operating conditions, such as oxygen content, adsorption temperature and space velocity, which influenced the PH₃ adsorption capacity were analyzed. The results showed that over 99% PH₃ adsorption efficiency was achieved on impregnated activated carbon. In addition, oxygen content, adsorption temperature and space velocity were important factors that influenced PH₃ adsorption removal onto impregnated activated carbon. The result showed that the maximum PH₃ adsorption capacity was 134 mg of PH₃/g of adsorbent during the optimal operating conditions, which were 3% of oxygen content, 70°C of adsorption temperature, and 3000 h^-1 of space velocity.