Kinetics and Products Distribution Study on the Catalytic Effect of Zn/HZSM-5 over Pyrolysis of Chlorella through TG-FTIR and Py-GC/MS

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  • 1. School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
    2. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
    3. Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, China

网络出版日期: 2023-11-27

基金资助

This study was supported by the National Natural Science Foundation of China (31901406), the Fundamental Research Funds for the Central Universities (JZ2020HGTB0044), Major R&D projects of key technologies of Hefei (J2019G22).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Kinetics and Products Distribution Study on the Catalytic Effect of Zn/HZSM-5 over Pyrolysis of Chlorella through TG-FTIR and Py-GC/MS

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  • 1. School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
    2. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
    3. Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, China

Online published: 2023-11-27

Supported by

This study was supported by the National Natural Science Foundation of China (31901406), the Fundamental Research Funds for the Central Universities (JZ2020HGTB0044), Major R&D projects of key technologies of Hefei (J2019G22).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

摘要

本研究采用Py-GC/MS和Py-GC/MS研究了小球藻的热解和催化热解行为。热重结果表明,小球藻的热解过程可分成三个阶段,并采用Coats-Redfern动力学模型对所得数据进行了分析和验证。回归系数表明小球藻的热解接近二级反应。小球藻热解活化能和小球藻+HZSM-5、小球藻+Zn/HZSM-5催化热解活化能分别为61.645、59.080和56.808kJ mol-1。结合FTIR数据,我们发现HZSM-5的加入有效降低了热解所需的活化能,Zn/HZSM-5的加入不仅降低了活化能,还能降低含氧化合物的产率,增加CO2的排放,有利于高附加值烃类产品的生产。通过Py-GC/MS证明Zn/HZSM-5的加入可以减少酮类和醛类的生成,增加含氮化合物的生成。由此可见,通过小球藻进行催化热解,可以扩大小球藻的利用范围,获得更高质量的生物油,这对未来可利用能源的选择将起到至关重要的作用。

本文引用格式

WANG Lu, YE Tao, MA Xianming, LIN Yan, CHEN Juan, WANG Fangbin, MA Peiyong, LIU Jian . Kinetics and Products Distribution Study on the Catalytic Effect of Zn/HZSM-5 over Pyrolysis of Chlorella through TG-FTIR and Py-GC/MS[J]. 热科学学报, 2023 , 32(4) : 1635 -1643 . DOI: 10.1007/s11630-023-1797-8

Abstract

In this study, both the pyrolysis and catalytic pyrolysis behaviour of chlorella were investigated using thermogravimetric analysis combined with Fourier Transform Infrared spectrum (TG-FTIR) and Py-GC/MS. The results of TG indicated the pyrolysis of chlorella was divided into three stages, and the Coats-Redfern kinetic model was used for the analysis and validation of the obtained thermal data. The regression coefficients indicated that the pyrolysis of chlorella was close to second-order reaction. The activation energy of pyrolysis of chlorella and catalytic pyrolysis of chlorella+HZSM-5, chlorella+Zn/HZSM-5 was 61.645, 59.080 and 56.808 kJ∙mol–1, respectively. Combined with the data of FTIR, we found that the addition of the HZSM-5 effectively reduced the activation energy required by pyrolysis; the addition of the Zn/HZSM-5 could not only reduce the activation energy, but also reduce the yield of oxygen-containing compounds, increase the emissions of CO2, and facilitate the production of high value-added hydrocarbon products. These results were also verified by Py-GC/MS that the addition of Zn/HZSM-5 could reduce the formation of ketones and aldehydes and increase the production of nitrogen-containing compounds. Thus, through the catalytic pyrolysis of chlorella, the utilization range of chlorella can be expanded, and better bio-oil can be obtained, which will play a crucial role in the selection of available energy in the future.

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