Rapid Determination and Process Parameter Optimization of 5-hydroxymethylfurfural from Chestnut Shell Biomass
Biomass-based 5-hydroxymethylfurfural(5-HMF)is highlighted as an important platform chemical.The detection of 5-HMF in biomass conversion system mainly includes HPLC,UV spectrophotometry,etc.,but the sample pre-processing required by HPLC is complex,and the equipment is expensive.The UV spectrophotometric method reported in literature requires glacial acetic acid as the dilution solvent,which greatly increases the industrial detection cost of 5-HMF.This work adopts agricultural discarded chestnut shells as raw materials to prepare biomass-based 5-HMF,and establishes a UV three-wavelength spectrophotometric method to quickly detect 5-HMF in extraction solution.This method uses deionized water instead of glacial acetic acid as the sample dilution solvent,greatly reducing the detection cost.In addition,the 5-HMF recovery rates of the five sets of recycling experiments ranged from 94.4%to 105.5%,indicating that the established experimental method has good detection accuracy.The key process parameters such as reaction temperature,reaction time and solid-liquid ratio affect the 5-HMF yield,and the experimental results show that the optimal reaction temperature,optimal reaction time and optimal solid-liquid ratio are 190℃,4 h and 1∶20,respectively.The results of this paper can provide a cheap,fast,and accurate method for the detection of 5-HMF,and provide guidance to some extent for the preparation of 5-HMF by high-value transformation of agricultural discarded chestnut shells.
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