沉淀剂对CuO/CeO2催化剂织构性质及CO催化氧化性能的影响

The Effect of Precipitators on the Texture Properties and CO Catalytic Oxidation Performance of CuO/CeO2 Catalysts

于东北 李学 杨昕毓 张财顺 韩蛟 王宏浩 张磊 高志贤

Dongbei YU Xue LI Xinyu YANG Caishun ZHANG Jiao HAN Honghao WANG Lei ZHANG Zhixian GAO

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001 中石油天津天然气管道有限公司，天津 300457

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China PetroChina Tianjin Gas Pipeline Co. ，Ltd. ，Tianjin 300457，China

以KOH和K2CO3为沉淀剂，采用水热法制备了催化剂CuCe?OH和CuCe?CO3，通过XRD、BET、H2?TPR和TG?DTA等技术对催化剂进行表征，使用固定床反应器对催化剂进行了CO催化氧化性能评价。结果表明，沉淀剂的类别不仅对催化剂的织构性质有较大影响，而且还决定能否成功制备出不含杂晶相的Cu?Ce催化剂；CuCe?OH和CuCe?CO3催化剂的比表面积分别为96.5 m2/g和17.3 m2/g，二者差别明显；在空速为60 000 mL/（g·h）、CO体积分数为0.6%、O2体积分数为1.5%、Ar体积分数为97.9%的评价条件下，CuCe?OH催化剂表现出较好的催化活性，140 ℃时CO转化率达到99.0%。

Catalysts CuCe?OH and CuCe?CO3 were prepared by hydrothermal method using KOH and K2CO3 as precipitating agents. The catalyst was characterized by XRD, BET, H2?TPR and TG?DTA, and its CO catalytic oxidation performance was evaluated by a fixed bed reactor. The results show that the type of precipitator not only has a great influence on the texture properties of the catalyst, but also determines whether the CuCe catalyst without heterocrystalline phase can be successfully prepared. The specific surface areas of CuCe?OH and CuCe?CO3 catalysts were 96.5 m2/g and 17.3 m2/g, respectively. Under the evaluation conditions of 60 000 mL/（g·h）, CO volume fraction of 0.6%, O2 volume fraction of 1.5%, Ar volume fraction of 97.9%, CuCe?OH catalyst showed good catalytic activity, and CO conversion reached 99.0% at 140 ℃.

国家自然科学基金项目(22379059);辽宁省应用基础研究计划项目(2023JH2/101300224);辽宁省教育厅服务地方项目（揭榜挂帅）(LJKFZ20220201);辽宁省教育厅面上项目(LJKMZ20220728);山西省应用基础研究青年基金项目(20210302124338)

10.12422/j.issn.1672-6952.2023.06.008