Scholarlink

<p>In the present study, MY catalyst, which was prepared through an ion exchange process using MCl<sub>2</sub> (where M represents Cr) with NaY (zeolite) and a Si/Al ratio of 2.4 was employed in the oxidation of cyclohexane. The catalyst’s characterization was conducted using surface analyzer (N<sub>2</sub> physisorption), Thermogravimetric Analysis (TGA), field emission scanning electron microscopy (FE-SEM) and atomic absorption spectroscopy (AAS). Upon ion exchange with MCl<sub>2</sub>, there was no observable variation in the BET surface area and pore diameter of Y zeolite but there was a marginal reduction in pore volume. TGA analysis revealed a weight loss occurring within the range of 50–250&#xa0;°C which corresponded to the desorption of water and some organic species within the MY channels. The pure crystalline CrY exhibited a cubic shape with irregular sizes ranging from 0.5 to 2 µm. The SEM-EDX metal analysis suggested a nearly constant composition and a homogeneous distribution of the metal throughout the crystal. The leaching test demonstrated no significant leaching during the reaction which implied the catalyst’s stability even at higher temperatures. Under optimal conditions (160&#xa0;°C and 14 bars of O<sub>2</sub> pressure), the catalyst attained a 5.38% conversion of cyclohexane and a total selectivity of 93.70% for KA-oil. In conclusion, our study exhibits the successful preparation and characterization of the MY catalyst with its favorable stability, structural properties and decent catalytic performance in cyclohexane oxidation under optimized conditions.</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

Chrome supported metal ion exchange–zeolite catalyst for cyclohexane selective oxidation

  • 期刊论文

  • 发表日期：

    2026年6月18日

查看全文
  • Abdulaziz Sami Bentalib,
  • Fahad Saleh Al-Mubaddel,
  • Abdelhamid M. Ajbar,
  • Seham S. Alterary,
  • Chun-Yang Yin,
  • Yousef M. M. Alanazi,
  • Fehaid Alsubaie,
  • Fares A. AL Sadoon,
  • Abdulrahman Bin Jumah,
  • Maher M. Alrashed,
  • Mohammed Bin Daej,
  • Mohammednoor Altarawneh

摘要

In the present study, MY catalyst, which was prepared through an ion exchange process using MCl2 (where M represents Cr) with NaY (zeolite) and a Si/Al ratio of 2.4 was employed in the oxidation of cyclohexane. The catalyst’s characterization was conducted using surface analyzer (N2 physisorption), Thermogravimetric Analysis (TGA), field emission scanning electron microscopy (FE-SEM) and atomic absorption spectroscopy (AAS). Upon ion exchange with MCl2, there was no observable variation in the BET surface area and pore diameter of Y zeolite but there was a marginal reduction in pore volume. TGA analysis revealed a weight loss occurring within the range of 50–250 °C which corresponded to the desorption of water and some organic species within the MY channels. The pure crystalline CrY exhibited a cubic shape with irregular sizes ranging from 0.5 to 2 µm. The SEM-EDX metal analysis suggested a nearly constant composition and a homogeneous distribution of the metal throughout the crystal. The leaching test demonstrated no significant leaching during the reaction which implied the catalyst’s stability even at higher temperatures. Under optimal conditions (160 °C and 14 bars of O2 pressure), the catalyst attained a 5.38% conversion of cyclohexane and a total selectivity of 93.70% for KA-oil. In conclusion, our study exhibits the successful preparation and characterization of the MY catalyst with its favorable stability, structural properties and decent catalytic performance in cyclohexane oxidation under optimized conditions.