Sudem Borgayary , Dulu Brahma , Riu Riu Wary , Anamika Baishya , Samuel Lalthazuala Rokhum , Pranjal Kalita
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引用次数: 0
摘要
背景生物质衍生固体酸催化剂的开发具有符合通过果糖脱水生产 5-羟甲基糠醛 (HMF) 的绿色化学规程的优势。方法我们报道了废弃腰果壳产生的炭作为生物炭，通过浓硫酸处理加入 -SO3H 基团制备磺化生物炭 (SBC) 催化剂。重要发现采用不同的表征方法，包括 XRD、傅立叶变换红外光谱、XPS、FESEM-EDS、TEM、TPD 和 BET 分析，研究了所制备 SBC 催化剂的结构、形态、化学成分、酸度和孔隙率。粉末 X 射线衍射图（PXRD）和 IV 型等温线（BET）证实了材料的介孔性质，而 TEM 分析则观察到了片状结构。在水和甲苯（1:2）的双相混合溶剂中，催化剂在 120 °C、60 分钟的最佳条件下显示出较高的 HMF 收率（92%）。通过 NH3-TPD 分析，催化剂的高酸强度可以解释高产率的原因。用谢尔顿法进行的浸出测试和可回收性实验证明了该催化剂的必要性和异质性。
Agro-waste derived sulfonated biochar material as a sustainable heterogeneous catalyst for conversion of fructose to 5-hydroxymethylfurfural
Background
Development of biomass derived solid acid catalysts has the advantage to conform the green chemistry protocol for production of 5-hydroxymethylfurfural (HMF) by dehydration of fructose.
Method
We have reported waste cashew nut shell produced char as a biochar to prepare sulfonated biochar (SBC) catalyst by incorporating –SO3H group through treatment of concentrated sulfuric acid.
Significant findings
Different methods of characterization including XRD, FT-IR, XPS, FESEM-EDS, TEM, TPD and BET analysis, were used to study the structure, morphology, chemical compositions, acidity and porosity of the produced SBC catalysts. The mesoporous nature of the material was confirmed by the powder X-ray diffraction patterns (PXRD), type IV isotherm (BET), and flakes-like structure was observed in TEM analysis. The catalyst showed high yield of HMF (92%) under optimum conditions of 120 °C in 60 min under biphasic solvent mixture of water and toluene (1:2). High yield could be explained by high acid strength of catalyst as observed by NH3-TPD analysis. Leaching test by Sheldon's method and recyclability experiment proved the need and heterogeneity of the present catalyst.
期刊介绍：
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.
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