Cerium modified copper-based mordenite zeolite catalyst for high-temperature selective catalytic reduction NO with NH3 of gas turbines
Cerium modified copper-based mordenite zeolite catalyst for high-temperature selective catalytic reduction NO with NH3 of gas turbines
复制标题
用于燃气轮机NH3高温选择性催化还原NO的铈改性铜基丝光沸石催化剂
DOI：
10.1007/s11144-022-02164-3
复制
发表时间：
2022-02-27
影响因子：
1.8
通讯作者：
Zhuang, Ke
中科院分区：
文献类型：
--
作者：
Sheng, Zhongyi;Chen, Yang;Zhuang, Ke
采用Cu掺杂丝光沸石改性铈催化剂（Ce-Cu/莫尔）作为燃气轮机高温氨选择性催化还原NO（NH3-SCR）的潜在催化剂。Ce-Cu/莫尔催化剂在500 ~ 620 ℃范围内具有上级的催化性能（NOx转化率大于90%），此时V2 O 5-WO 3/TiO 2催化剂完全失活。Ce的添加抑制了NH3氧化副反应。采用XRD、BET、NH_3-TPD、XPS、SEM、H-2-TPR和Py-IR等一系列物理化学表征手段对催化剂和热震样品进行了分析。结果表明，Ce的引入使催化剂具有更大的比表面积、更多的化学吸附氧和丰富的B酸中心。Ce-Cu/莫尔催化剂的上级催化性能是这些综合效应的结果。这一结果对燃气轮机高温催化剂的开发具有指导意义。
A Cu-doped mordenite zeolite modified cerium catalyst (Ce-Cu/MOR) was tested as a potential catalyst of high temperature selective catalytic reduction NO with NH3 (NH3-SCR) of gas turbines. Ce-Cu/MOR catalyst has superior catalytic performance (more than 90% NOx conversion) from 500 to 620 degrees C, when V2O5-WO3/TiO2 catalyst is completely deactivated. The addition of Ce inhibits the NH3 oxidation side reaction. A series of physical and chemical characterization (XRD, BET, NH3-TPD, XPS, SEM, H-2-TPR, and Py-IR) were applied to analyze the catalysts and the heat-shocked samples. The obtained results illustrated that the larger specific surface area, more chemisorbed oxygen, and abundant Bronsted acid sites were generated by the introduction of Ce. The superior catalytic performance of Ce-Cu/MOR could attribute to these comprehensive effects. This result has a guiding significance for the development of high-temperature catalysts for gas turbines.