中文摘要：

采用等体积浸渍法制备了Cu-K-La/γ-Al2O3催化剂,考察了KCl对该催化剂催化HCl氧化制Cl2反应性能的影响.当KCl的负载量为5 wt%时,Cu-K-La/γ-Al2O3催化剂表现出较好的催化活性和稳定性,可在较大的原料气空速变化范围内使用.在0.1 MPa,360°C,空速450 L/（kg-cat·h）和HCl/O2摩尔比为2：1的反应条件下,Cu-K-La/γ-Al2O3催化剂上HCl转化率在100 h内保持85%以上.表征结果表明,Cu,K和La物种均高度分散于γ-Al2O3载体表面;一定量KCl的加入可降低Cu2＋→Cu＋的还原温度,从而提高Cu2＋活性中心的催化活性.

英文摘要：

Cu-K-La/γ-Al2O3 catalysts prepared by the incipient wetness impregnation for the catalytic oxida‐tion of HCl to Cl2 at atmospheric pressure were investigated for the effect of KCl on the catalyst performance. Cu‐K‐La/γ‐Al2O3 catalyst with 5 wt% KCl loading showed good activity and stability due to the promotion by KCl. It gave good activity over a wide range of space velocity of the feed gas and conversion of HCl above 85%, and it was nearly unchanged in activity after 100 h reaction at the conditions of 0.1 MPa, 360 °C, space velocity of 450 L/（kg-cat·h）, and HCl/O2 molar ratio = 2：1. X‐ray diffraction results indicated that Cu, K, and La species were highly dispersed on the surface of the γ‐Al2O3 support. H2 temperature‐programmed reduction results indicated that the addition of KCl favored the reduction of Cu2＋ to Cu＋ and improved the activity of the active sites of Cu2＋ species for HCl oxidation.