Abstract
以13X分子筛为原料采用离子交换法制备了不同Cr含量的Cr-13X和K-Cr-13X分子筛催化剂，在固定床反应器上研究了催化剂对二氯甲烷的催化燃烧性能. 研究结果表明，Cr含量（质量分数）小于5.19%时，对催化剂的结构没有明显影响. 添加Cr提高了CO 2 的选择性，无CH 3 Cl副产物生成. 交换适量的K可以提高Cr-13X催化剂的活性和稳定性，并提高CO 2 和HCl的选择性. 催化剂的表面酸性和氧化性是影响催化剂活性和产物分布的主要因素. 在空速为1×10 4 h -1 ，二氯甲烷浓度为5692 mg/m 3 的条件下，1.31%K-5.01%Cr-13X分子筛催化剂对二氯甲烷催化燃烧50%的温度（ t 50 ）为212 ℃，燃烧98%的温度（ t 98 ）为 298 ℃，CO 2 选择性为60.6%，HCl选择性为96.5%，连续反应100 h，未发现有明显失活现象.
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