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Abstract <p>Glucose transformation to methyl lactate was investigated over microporous Sn-H-Y- zeolite with SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio of 30 as well as alkali metal modified mesoporous dealuminated Sn-H-Y-zeolites in the temperature range of 150-180<sup>o</sup>C. The catalysts were synthesized either by evaporation-impregnation or ion-exchange methods using a two-step procedure for Sn-and K-modification. The catalysts were characterized by several physico-chemical methods including SEM, TEM, pyridine adsorption-desorption FTIR, UV-VIS spectroscopy, solid state NMR-spectroscopy, nitrogen adsorption, TGA and CHNS for spent catalysts. The highest yield of methyl lactate of 72% was obtained at 150<sup>o</sup>C over dealuminated K-Sn-H-Y-30 catalyst at complete glucose conversion. Especially low K/Sn ratio was preferential for maximizing methyl lactate yield. Catalyst regeneration and leaching were also investigated.</p> Statement of Novelty <p>The impact of potassium on mesoporous Sn-modified H-Y-30 was elucidated resulting in a very high yield of methyl lactate (72%) in glucose transformation over dealuminated K-Sn-H-Y-30 catalyst.</p>

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Synthesis of Methyl Lactate from Glucose over Alkali-Modified Sn-H-Y Catalysts

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月24日

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  • Ramin Majidov,
  • Atte Aho,
  • Zuzana Vajglova,
  • Narendra Kumar,
  • Robert Lassfolk,
  • Ilari Angervo,
  • Teija Tirri,
  • Mika Lastusaari,
  • Kari Eränen,
  • Päivi Mäki-Arvela,
  • Jukka Hietala,
  • Dmitry Yu. Murzin

摘要

Abstract

Glucose transformation to methyl lactate was investigated over microporous Sn-H-Y- zeolite with SiO2/Al2O3 ratio of 30 as well as alkali metal modified mesoporous dealuminated Sn-H-Y-zeolites in the temperature range of 150-180oC. The catalysts were synthesized either by evaporation-impregnation or ion-exchange methods using a two-step procedure for Sn-and K-modification. The catalysts were characterized by several physico-chemical methods including SEM, TEM, pyridine adsorption-desorption FTIR, UV-VIS spectroscopy, solid state NMR-spectroscopy, nitrogen adsorption, TGA and CHNS for spent catalysts. The highest yield of methyl lactate of 72% was obtained at 150oC over dealuminated K-Sn-H-Y-30 catalyst at complete glucose conversion. Especially low K/Sn ratio was preferential for maximizing methyl lactate yield. Catalyst regeneration and leaching were also investigated.

Statement of Novelty

The impact of potassium on mesoporous Sn-modified H-Y-30 was elucidated resulting in a very high yield of methyl lactate (72%) in glucose transformation over dealuminated K-Sn-H-Y-30 catalyst.