化工进展 ›› 2024, Vol. 43 ›› Issue (S1): 374-381.DOI: 10.16085/j.issn.1000-6613.2024-0836

• 工业催化 • 上一篇    下一篇

脱铝分子筛固体酸催化葡萄糖制备5-羟甲基糠醛

何世坤1(), 张荣花1, 李昊阳1, 潘晖1,2, 冯君锋1,2()   

  1. 1.南京林业大学化学工程学院,江苏 南京 210037
    2.南京林业大学江苏省林业资源高效加工利用协同创新中心;江苏省高校农林生物质化学与利用国家重点实验室培育建设点,江苏 南京 210037
  • 收稿日期:2024-05-22 修回日期:2024-09-12 出版日期:2024-11-20 发布日期:2024-12-06
  • 通讯作者: 冯君锋
  • 作者简介:何世坤(1997—),男,硕士研究生,研究方向为生物质催化转化。E-mail:1502125563@qq.com
  • 基金资助:
    国家自然科学基金(32101469);广西林产化学与工程重点实验室(国家民委重点实验室)开放基金(GXFK2204);江苏省生物质能源与材料重点实验室自主科研项目(JSBEN-S-202202)

Preparation of 5-hydroxymethylfurfural from glucose catalyzed by dealuminized molecular sieve solid acids

HE Shikun1(), ZHANG Ronghua1, LI Haoyang1, PAN Hui1,2, FENG Junfeng1,2()   

  1. 1.College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
    2.Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University; Jiangsu Provincial Key Lab. For the Chemistry and Utilization of Agro-Forest Biomass, Nanjing 210037, Jiangsu, China
  • Received:2024-05-22 Revised:2024-09-12 Online:2024-11-20 Published:2024-12-06
  • Contact: FENG Junfeng

摘要:

利用不同浓度的硝酸对HY分子筛进行脱铝处理,脱铝后的HY分子筛具有不同的比表面积和孔径。以脱铝后的分子筛作为载体,利用浸渍法制备了Sn掺杂的双功能催化剂,并将其用于葡萄糖转化为5-HMF的反应。通过X射线衍射(XRD)、扫描电镜(SEM)、N2吸附/解吸、X射线光电子能谱(XPS)和酸碱滴定等手段对催化剂进行表征。结果表明:合成的0.5mol/L-10%Sn-HY具有介孔结构、八面体形貌和适宜的B/L酸位比等。以甲基异丁基酮(MIBK)和NaCl-H2O作为反应体系,在0.2g催化剂、165℃、60min的优化条件下,5-羟甲基糠醛的得率为67.3%。经过5次循环后,5-HMF得率仍旧可以达到49%,说明催化剂具有良好的稳定性。同时,初步探究葡萄糖转化为5-HMF的反应机理。总的来说,这项工作建立了一个高效的多相催化系统,展示了将生物质转化为平台化合物的巨大潜力。

关键词: 催化剂, 分子筛, 生物质, 双相体系, 5-羟甲基糠醛

Abstract:

HY molecular sieves were dealuminized with nitric acid of different concentrations. The dealuminized HY molecular sieves had different specific surface areas and pore sizes. The Sn-doped bifunctional catalyst for the conversion of glucose to 5-HMF was prepared by impregnation method using the dealuminized molecular sieve as the carrier. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption/desorption, X-ray photoelectron spectroscopy (XPS) and acid-base titration. The results showed that the synthesized 0.5mol/L-10% Sn-HY had mesoporous structure, octahedral morphology and suitable B/L acid site ratio. In the reaction system of methyl isobutyl ketone (MIBK) and NaCl-H2O, the yield of 5-hydroxymethylfurfural was 67.3% under the optimized conditions of 0.2g catalyst, 165℃ and 60min. After five cycles, the 5-HMF yield could still reach 49%, indicating that the catalyst had good stability. Meanwhile, the reaction mechanism for the conversion of glucose to 5-HMF was preliminarily investigated. Overall, this work established an efficient multiphase catalytic system that demonstrated the great potential of converting biomass into platform compounds.

Key words: catalyst, molecular sieves, biomass, biphasic system, 5-hydroxymethylfurfural

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