The flue gas from waste incineration power plants contains high-level zinc species that may deactivate the catalyst for selective catalytic reduction (SCR) of nitrogen oxides (NO_x) with NH₃. A comparison experiment was designed to investigate the effect of different types and Zn/Ce molar ratios on the performance of CeO₂–TiO₂ catalysts for the senior undergraduates majoring in energy, environmental, and chemical engineering. This possible inactivation mechanism of CeO₂–TiO₂ SCR catalysts was explored by using X-ray diffraction (XRD), N₂ adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs). After this comparative laboratory experiment, students can comprehend the principles and processes of SCR technology, learn the preparation methods and characterization of the catalyst, and grasp scientific thinking methods for analyzing and solving a practical problem. Meanwhile, students are guided to realize the environmental issues of industrial processes and understand the limitations of SCR technology. In addition, this comprehensive experiment plays an important role in strengthening students’ experiment skill and solving a practical problem using interdisciplinary knowledge.

中文翻译：

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锌物种如何影响 CeO2-TiO2 催化剂用于 NH3 选择性催化还原 NO 的性能？比较实验室实验

垃圾焚烧发电厂的烟气中含有高含量的锌物质，可能会使用 NH _{3选择性催化还原 (SCR) 氮氧化物 (NO x} )的催化剂失活。为能源、环境与化工专业高年级本科生设计了对比实验，探讨不同类型和Zn/Ce摩尔比对CeO ₂ -TiO ₂催化剂性能的影响。通过使用X射线衍射（XRD）、N ₂吸附、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和原位漫反射红外傅里叶变换探索了CeO ₂ –TiO ₂ SCR催化剂的这种可能的失活机制光谱（DRIFT）。通过本次室内对比实验，学生可以了解SCR技术的原理和流程，了解催化剂的制备方法和表征，掌握分析和解决实际问题的科学思维方法。同时引导学生认识工业过程的环境问题并了解SCR技术的局限性。此外，这种综合性实验对于加强学生的实验技能、运用跨学科知识解决实际问题具有重要作用。