Scholarlink

<p>Cu-KFI zeolite with 8-membered rings has been recognized as a highly promising catalyst for the ammonia selective catalytic reduction (NH<sub>3</sub>-SCR), but the Al-rich feature for this zeolite strongly influences its hydrothermal stability. One of the effective strategies for solving this issue is to introduce rare earth elements in the zeolite. Herein, we showed an efficient synthesis of LaCe-KFI zeolite from a spent fluid catalytic cracking (FCC) catalyst containing La and Ce species as the raw material under solvent-free conditions. Interestingly, the introduction of rare-earth elements in KFI zeolite could maintain the stability of active copper species and zeolite framework under hydrothermal aging conditions at 800 °C for 12 h, resulting in excellent hydrothermal stability and superior catalytic performance in NH<sub>3</sub>-SCR reaction. This novel method for zeolite production not only boosts catalytic efficiency but also facilitates the sustainable recycling of industrial solid waste, in good agreement with the tenets of green chemistry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Efficient Synthesis of Rare-earth-based KFI from Spent Fluid Catalytic Cracking Catalyst

  • 期刊论文

  • 发表日期：

    2026年5月7日

查看全文
  • Linjie Guan,
  • Pei Liu,
  • Qinming Wu,
  • Feng-Shou Xiao

摘要

Cu-KFI zeolite with 8-membered rings has been recognized as a highly promising catalyst for the ammonia selective catalytic reduction (NH3-SCR), but the Al-rich feature for this zeolite strongly influences its hydrothermal stability. One of the effective strategies for solving this issue is to introduce rare earth elements in the zeolite. Herein, we showed an efficient synthesis of LaCe-KFI zeolite from a spent fluid catalytic cracking (FCC) catalyst containing La and Ce species as the raw material under solvent-free conditions. Interestingly, the introduction of rare-earth elements in KFI zeolite could maintain the stability of active copper species and zeolite framework under hydrothermal aging conditions at 800 °C for 12 h, resulting in excellent hydrothermal stability and superior catalytic performance in NH3-SCR reaction. This novel method for zeolite production not only boosts catalytic efficiency but also facilitates the sustainable recycling of industrial solid waste, in good agreement with the tenets of green chemistry.