Arsenic & Phosphine Removal

Arsine (AsH3) is a hydrophobic, very volatile, and highly poisonous gas, which  has the toxicity about seven times higher than that of lewisite. AsH3 released in the air commonly arises from various sources such as the processes in which arsenic containing metals react with acids, coal gasification, yellow phosphorus tail gas and the burning of fossil fuels at high temperatures. Adsorption is one of the most mature and promising methods because of its ease of operation, flexible design, low temperature condition, and low-cost, and it is more appropriate for the removal of AsH3 at low concentrations


Adsorbents for Arsine & Phosphine


Activated alumina (AA) is the most commonly used adsorbent for the removal of arsenic from aqueous solutions. However, conventional porous solids including AA have ill-defined pore structures and, typically, low adsorption capacities and actually in a kinetically slow manner. An ideal adsorbent should have uniformly accessible pores, and interlinked pore system, a high surface area, and physical and/or chemical stability. To meet this requirement, mesoprous alumina (MA) with a wide surface area and uniform pore size  was prepared, and a spongelike interlinked pore system was developed through a post-hydrolysis method



GSorb-810 is a Cu/ZnO  base adsorbent that widely used for removal of arsine, phosphine and reactive
sulfur from propylene containing streams. Due to its high surface area and ultra fine copper crystallite size, GSorb-810 is a ideal choice for the removal of arsine, phosphine, H2S and COS from process and product streams