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林产化学与工业 ›› 2023, Vol. 43 ›› Issue (1): 63-71.doi: 10.3969/j.issn.0253-2417.2023.01.008

• 研究报告 • 上一篇    下一篇

水热液化制备5-羟甲基糠醛的碳稳定同位素分馏研究

程琴1,2, 沈娟章1, 蔡燕燕1, 叶俊1, 午紫阳1, 谭卫红1,*()   

  1. 1. 中国林业科学研究院 林产化学工业研究所;江苏省生物质能源与材料重点实验室;国家林业和草原局林产化学工程重点实验室;林木生物质低碳高效利用国家工程研究中心,江苏 南京 210042
    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 南京 210037
  • 收稿日期:2021-12-16 出版日期:2023-02-28 发布日期:2023-02-28
  • 通讯作者: 谭卫红 E-mail:tanweihong71@163.com
  • 作者简介:谭卫红, 副研究员, 博士, 从事天然产物分离、精制与鉴别研究; E-mail: tanweihong71@163.com
    程琴(1997-), 女, 贵州贵阳人, 硕士生, 研究方向: 生物质化学与工程
  • 基金资助:
    国家重点研发计划资助项目(2018YFB1501500)

Carbon Stable Isotope Fractionation of 5-Hydroxymethylfurfural from Hydrothermal Liquefaction

Qin CHENG1,2, Juanzhang SHEN1, Yanyan CAI1, Jun YE1, Ziyang WU1, Weihong TAN1,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2021-12-16 Online:2023-02-28 Published:2023-02-28
  • Contact: Weihong TAN E-mail:tanweihong71@163.com

摘要:

对比了不同碳稳定同位素组成原料在水热液化制备5-羟甲基糠醛(5-HMF) 过程中碳稳定同位素分馏特征,研究原料的碳稳定同位素组成对5-HMF产率的影响。结果表明:木薯淀粉水热液化制备的5-HMF的最大产率为33.90%,高于玉米淀粉的29.93%,杨木纤维素(P-C)最大产率为31.00%,高于玉米秸秆纤维素(CS-C)的30.76%,竹粉和杨木的最大产率分别为13.00%和13.80%,高于玉米秸秆和玉米芯(分别为11.60%和12.53%)。在反应时间为15 min时,不同原料的反应速率如下:木薯淀粉0.301 g/(L·min)大于玉米淀粉0.128 g/(L·min),P-C为0.513 g/(L·min)大于CS-C的0.386 g/(L·min),竹粉0.133 g/(L·min)大于杨木0.124 g/(L·min),大于玉米芯0.117 g/(L·min),大于玉米秸秆0.097 g/(L·min)。δ13C值较小的原料(木薯淀粉、P-C、杨木、竹粉)反应过程中的δ13C值在反应初期的变化速率大于δ13C较大的原料(玉米淀粉、CS-C、玉米秸秆和与玉米芯)。水热过程中存在稳定同位素动力学效应,13C同位素较富集的原料参与反应需要的能量更多,反应速率慢,5-HMF的产率低。液化过程中结构简单的原料稳定同位素分馏影响较大;液化程度越大,δ13C的变化程度越大。

关键词: 水热液化, 木质纤维素生物质, 碳同位素分馏, 5-羟甲基糠醛, 单体同位素分析

Abstract:

In this work, the carbon isotopic fractionation characteristics of feedstocks with different stable carbon isotopic compositions during hydrothermal liquefaction for preparation of 5-hydroxymethylfurfural(5-HMF) were compared, and the effect of carbon stable isotope composition of raw materials on the yield of 5-HMF was studied. The results showed that the maximum yield of tapioca starch was 33.90%, which is higher than those of corn starch(29.93%), poplar cellulose(P-C, 31.00%), and corn straw cellulose(CS-C, 30.76%), respectively. The maximum yields of bamboo flour and poplar were 13.00% and 13.80%, which were higher than those of corn straw(11.6%) and corn cob(12.53%), respectively. At the reaction time of 15 min, the reaction rate of different raw materials: tapioca starch 0.301 g/(L·min) was greater than corn starch 0.128 g/(L·min), poplar cellulose 0.513 g/(L·min) was greater than corn straw cellulose 0.386 g/(L·min), and bamboo powder 0.133 g/(L·min) was greater than poplar 0.124 g/(L·min), which was greater than corn cob 0.117 g/(L·min) and greater than corn straw 0.097 g/(L·min). In the reaction process, the change rate of δ13C value of raw materials with smaller δ13C value(cassava starch, poplar cellulose, poplar and bamboo powder) in the initial stage of reaction was greater than that of raw materials with larger δ13C value(corn starch, corn straw cellulose, corn straw and corn cob). There was a stable isotope kinetic effect in the hydrothermal liquefaction process. The 13C isotope required more energy to participate than the enriched raw materials in the reaction, the reaction rate was slow, and the yield of 5-HMF was low. In the process of liquefaction, the stable isotope fractionation of raw material with a simple structure has a great influence. The greater degree of liquefaction, the greater degree of change of δ13C.

Key words: hydrothermal liquefaction, lignocellulose biomass, carbon isotope fractionation, 5-hydroxymethylfurfural, compound specific isotope analysis

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