Abstract: Various conditions influencing the formation rate of zinc silicate on an industrial S Zorb sorbent (FCAS-R09) were investigated. The results indicated that the formation temperature of zinc silicate reached as high as 800℃ without water. The presence of water vapor could significantly promote the formation of zinc silicate. At a water vapor partial pressure of 10 kPa, zinc silicate could be formed below 500 ℃, and the formation rate increased with the increase of water vapor partial pressure and/or reaction temperature. At constant water vapor partial pressure and reaction temperature, the formation rate of zinc silicate could be speeded up with the increase of overall pressure. Meanwhile, the ambient atmosphere had little effect on the formation rate of zinc silicate.

Key words: S Zorb, sorbent, zinc silicate, rate, formation