2025年"核理安邦“联合博士生学术论坛

用于费托合成的铀单原子催化剂

Not scheduled

12m

Location: 清华大学核能与新能源技术研究院

口头报告 核技术与应用、医学物理与工程 核技术与应用、医学物理与工程

Speaker

家辉 应

Abstract

Using a simple one-step impregnation method, supported cobalt catalysts and uranium single atoms loaded on cobalt nanoparticles were successfully synthesized. The presence of uranium single atoms was confirmed through multiple characterization techniques, including XRD, XPS, AC-STEM, and EXAFS. The influence of uranium single atom catalysts on Fischer-Tropsch synthesis was investigated using a small-scale fixed-bed reactor. Results indicated that the existence of uranium single atoms significantly enhanced CO conversion while maintaining high C5+ selectivity and low methane selectivity. Electron microscopy analysis and TPR experiments revealed that uranium single atoms do not promote the FT reaction by altering particle size distribution or reduction properties. Furthermore, scaled-up experiments demonstrated the potential of uranium single atom-containing catalysts for practical industrial applications.

摘要

用简单的一步浸渍法，在碳纳米管上制备了负载型钴催化剂和负载在Co纳米颗粒上的铀单原子。用XRD、XPS、AC-STEM、EXAFS等多种表征手段确认了铀单原子的存在。用小型固定床反应器研究了铀单原子催化剂对费托合成的影响。结果表明，铀单原子的存在能够显著增加CO的转化率，同时保有很高的C5+选择性与较低的甲烷选择性。电镜分析和TPR实验表明，铀单原子并不是从促进粒径变化或是改变还原性质来促进费托合成反应的。进一步的放大实验证明了含铀单原子的催化剂在实际工业应用中的潜力。