Scholarlink

<p>ITR zeolites display great potential in the methanol to propylene (MTP) reaction, and one of the important factors influencing performance is their composition. Notably, the relationship between the composition of ITR zeolites and MTP performance has been rarely explored. In this work, ITR zeolites with different compositions were successfully synthesized by changing chemical elements in the starting synthesis gel. Characterization results of X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption isotherms, solid magic angle spinning nuclear magnetic resonance (MAS NMR), temperature programmed desorption of ammonia (NH<sub>3</sub>-TPD), and pyridine adsorption infrared spectroscopy (Py-IR) showed that the obtained products had similar crystallinity, morphology, and textural parameters, but exhibited different acidic properties. The introduction of boron species increased the weak and Brønsted acid sites of ITR zeolites. Catalytic tests in the MTP reaction showed that the aluminoborosilicate ITR zeolites exhibited enhanced propylene selectivity and catalyst lifetime.</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

Direct Synthesis of ITR Zeolites with Different Compositions for the Conversion of Methanol to Propylene

  • 期刊论文

  • 发表日期：

    2026年1月7日

查看全文
  • Kai Fan,
  • Zihan Wu,
  • Shuo Liu,
  • Qinming Wu,
  • Weiping Zhang,
  • Xiangju Meng,
  • Feng-Shou Xiao

摘要

ITR zeolites display great potential in the methanol to propylene (MTP) reaction, and one of the important factors influencing performance is their composition. Notably, the relationship between the composition of ITR zeolites and MTP performance has been rarely explored. In this work, ITR zeolites with different compositions were successfully synthesized by changing chemical elements in the starting synthesis gel. Characterization results of X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption isotherms, solid magic angle spinning nuclear magnetic resonance (MAS NMR), temperature programmed desorption of ammonia (NH3-TPD), and pyridine adsorption infrared spectroscopy (Py-IR) showed that the obtained products had similar crystallinity, morphology, and textural parameters, but exhibited different acidic properties. The introduction of boron species increased the weak and Brønsted acid sites of ITR zeolites. Catalytic tests in the MTP reaction showed that the aluminoborosilicate ITR zeolites exhibited enhanced propylene selectivity and catalyst lifetime.