| 超滤黑液木质素催化热解特性研究 |
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| 引用本文： | 董志国,刘紫灏,李建,杨海平,王磊,陈汉平. 超滤黑液木质素催化热解特性研究[J]. 太阳能学报, 2020, 0(2): 58-65 |
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| 作者姓名： | 董志国 刘紫灏 李建 杨海平 王磊 陈汉平 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室;湖北工业大学材料与化学工程学院 |
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| 基金项目： | 国家自然科学基金(51622604)。 |
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| 摘 要： | 以从造纸黑液中超滤提纯的木质素为研究对象,利用红外光谱(FT-IR)和凝胶渗透色谱(GPC)研究超滤木质素的物化特性,选取ZnO、CuO、纳米Al2O3、Al2O3、CaO、TiO2和CaCO3作催化剂,在固定床550℃下进行木质素原位催化热解实验。结果表明,多级超滤工艺能有效脱除黑液中的杂质,得到纯净、多分散度较低的木质素。纳米Al2O3和TiO2对一元酚和愈创木酚有较高的选择性;CuO可促进焦炭裂解,产生较多的CO2和CO;ZnO、CaO和Al2O3能促进H2的生成;CaCO3可提高CO的产率。
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| 关 键 词： | 超滤 木质素 热解 催化剂 造纸黑液 |
STUDY ON CATALYTIC PYROLYSIS CHARACTERISTICS OF LIGNIN ULTRAFILTRATED FROM BLACK LIQUOR |
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| Dong Zhiguo,Liu Zihao,Li Jian,Yang Haiping,Wang Lei,Chen Hanping. STUDY ON CATALYTIC PYROLYSIS CHARACTERISTICS OF LIGNIN ULTRAFILTRATED FROM BLACK LIQUOR[J]. Acta Energiae Solaris Sinica, 2020, 0(2): 58-65 |
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| Authors: | Dong Zhiguo Liu Zihao Li Jian Yang Haiping Wang Lei Chen Hanping |
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| Affiliation: | (State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;College of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430079,China) |
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| Abstract: | The lignin extracted by ultrafiltration of papermaking black liquor was studied. The physicochemical properties of ultrafiltrate lignin were studied by Fourier transforming infrared spectrum(FT-IR)and Gel permeation chromatography(GPC)ZnO,CuO,nanoAl2O3,Al2O3,CaO,TiO2 and CaCO3 were selected as catalysts,and the in situ catalytic pyrolysis experiments of lignin were carried out in a fixed bed at 550 ℃. The results show that the multistage ultrafiltration process can effectively remove impurities in the black liquor and obtain pure and low polydisperse lignin. Nano Al2O3 and TiO2 have higher selectivity for monohydric phenol and guaiacol;CuO promotes bio-char cracking and produces more CO2 and CO;ZnO,CaO and Al2O3 promotes the release of H2;CaCO3 increases CO yield. These conclusions provide a scientific reference for the subsequent refinement design of lignin. |
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| Keywords: | ultrafiltration lignin pyrolysis catalyst black liquor of papermaking |
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