A new efficient sorbent of modified CaO was developed to capture HCl at high temperatures.Moreover

the HCl capture ability and mechanism of the sorbent at high temperatures(800℃to 950℃)was investigated in a fixed bed reactor.The results show that

the HCl capture ability of CaO was improved significantly by ethanol with volume concentration of 40%.The specific surface area and pore volume of the modified CaO became four and seven times larger than that of the unmodified CaO

respectively.The HCl capture efficiency was enhanced by an average of 20%.SEM analysis shows that pore structure of the modified CaO became more developed than that of the unmodified CaO

and the porous product layer appeared at the adsorbent surface

which was beneficial to the HCl capture.XRD analysis indicates the reaction products were mainly CaClOH and CaCl2

of which CaClOH was produced at the initial stage.