烟气中Ce-Cu/γ-Al_(2)O_(3)催化剂催化CO氧化性能的研究  

Study on CO oxidation performance of Ce-Cu/γ-Al_(2)O_(3) catalyst in flue gas

作　　者：向小凤[1] 张波[1] 张向宇[1] 陆续[1] 徐宏杰[1] XIANG Xiaofeng;ZHANG Bo;ZHANG Xiangyu;LU Xu;XU Hongjie(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2021年第10期124-129,共6页Thermal Power Generation

基　　金：国家重点研发计划项目(2018YFB0604100);中国华能集团有限公司总部科技项目(ZD-19-HKR01).

摘　　要：采用传统浸渍法制备了Ce-Cu/γ-Al_(2)O_(3)非贵金属催化剂,基于深度分级燃烧炉膛外CO氧化催化作用,在管式炉实验平台上,开展低温CO氧化催化基础实验研究。结果表明:在250~300℃之间,催化氧化CO效果明显(255℃时CO转化率78.62%),300℃之后保持较高CO转化率(大于99.5%);停留时间1.2 s时,在150~200℃就具有较高的CO氧化活性,延长到5 s后CO转化率55.7%(150℃),很快增加到97%(200℃),催化效果明显;对高体积分数CO(3000×10–6)也具备较高的催化剂活性和处理能力;催化效率随气速(0.2~0.8 L/min)减小而增大;含氧量(体积分数2%~3%)越高,催化剂效率越高;添加Co后Al_(2)O_(3)衍射峰轻微下降,有利于催化氧化活性的提高。Based on the catalytic effect of CO oxidation outside the furnace of deep staged combustion,the experimental study on Ce-Cu/γ-Al_(2)O_(3) non-precious metal catalyst prepared by conventional impregnation method was carried out in a tubular furnace.The results show that,the catalytic oxidation of CO was obvious at 250~300℃(the conversion rate of CO reached 78.62%at 255℃),and the conversion rate of CO was maintained at a high level(>99.5%)at temperatures higher than 300℃.When the residence time was 1.2 s,the CO oxidation activity was higher at 150~200℃.When the residence time was 5 s,the conversion rate of CO was 55.7%(150℃)and quickly increased to 97%(200℃),with obvious catalytic effect.The catalyst also had high activity and treatment capacity for CO with high volume fraction(3000×10^(-6)).The catalytic efficiency increased with the decrease of gas velocity(0.2~0.8 L/min)and the increase of oxygen content(2%~3%).The diffraction peak of Al_(2)O_(3) decreased slightly after the addition of Co,which is beneficial to the improvement of catalytic oxidation activity.

关 键 词：深度分级燃烧 CO氧化性 催化剂 Ce-Cu/γ-Al_(2)O_(3) 浸渍法 管式炉 

分 类 号：TK233[动力工程及工程热物理—动力机械及工程]