反应温度、持续时间和催化剂对半纤维素热解产物的影响

T. Sun, Yuanna Li, Ruisi Wang, Lu Zhang, Yanling Li, Peng Liu, Tingzhou Lei
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引用次数: 0

摘要

采用热解-气相色谱/质谱联用技术(Py-GC/MS)对木聚糖(XY)进行快速热解实验,探讨反应温度、持续时间和催化剂对XY热解产物分布的影响。结果表明,温度和持续时间对半纤维素热解产物的种类和产率有显著影响。在500-600℃条件下热解5-20 s有利于提高半纤维素热解可冷凝挥发物的收率。在所有催化实验中,以HZSM-5为催化剂时,醇类(37.31%)、碳水化合物(27.61%)和烃类(3.71%)的含量最高,醛类(9.76%)、酮类(2.20%)、酯类(0%)、呋喃类(0%)和n -化合物(4.09%)的含量最低。MCM-41促进醛类(59.94%)、酸类(5.11%)、酮类(6.92%)、酚类(0.30%)、醚类(0.61%)和n -化合物(18.70%)的生成,抑制醇类(1.21%)和碳水化合物(3.79%)的生成。ZrO2有利于提高呋喃含量(2.23%),降低酸含量(0.64%)。
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Influences of Reaction Temperature, Duration, and Catalysts on Hemicellulose Pyrolysis Products
Fast pyrolysis experiments were conducted on xylan (XY) using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) to explore influences of the reaction temperature, duration, and catalysts on product distributions from XY pyrolysis. The results show that temperature and duration can notably influence the classes and yields of compounds generated by the pyrolysis of hemicellulose. Pyrolysis at 500–600 °C for a duration of 5–20 s is conducive to improving the yields of condensable volatiles from hemicellulose pyrolysis. In all catalytic experiments, when taking HZSM-5 as the catalyst, alcohols (37.31%), carbohydrates (27.61%), and hydrocarbons (3.71%) have the highest contents while aldehydes (9.76%), ketones (2.20%), esters (0%), furans (0%), and N-compounds (4.09%) possess the lowest contents. MCM-41 promotes production of aldehydes (59.94%), acids (5.11%), ketones (6.92%), phenols (0.30%), ethers (0.61%), and N-compounds (18.70%) while inhibiting generation of alcohols (1.21%) and carbohydrates (3.79%). ZrO2 is conducive to increasing the content of furans (2.23%) while decreasing the content of acids (0.64%).
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来源期刊
Journal of Biobased Materials and Bioenergy
Journal of Biobased Materials and Bioenergy 工程技术-材料科学:生物材料
自引率
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发文量
60
审稿时长
6 months
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