Effects of low-temperature hydrothermal pretreatment of high-protein Chlorella sp.on N distribution and thermal degradation of solid residue

YUAN Song; HUANG Yan-qin; LIU Hua-cai; YUAN Hong-you; ZHUANG Xiu-zheng; YIN Xiu-li; WU Chuang-zhi

Volume 47 Issue 1

Jan. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(1): 39-52

YUAN Song, HUANG Yan-qin, LIU Hua-cai, YUAN Hong-you, ZHUANG Xiu-zheng, YIN Xiu-li, WU Chuang-zhi. Effects of low-temperature hydrothermal pretreatment of high-protein Chlorella sp.on N distribution and thermal degradation of solid residue[J]. Journal of Fuel Chemistry and Technology, 2019, 47(1): 39-52.

Citation:

YUAN Song, HUANG Yan-qin, LIU Hua-cai, YUAN Hong-you, ZHUANG Xiu-zheng, YIN Xiu-li, WU Chuang-zhi. Effects of low-temperature hydrothermal pretreatment of high-protein Chlorella sp.on N distribution and thermal degradation of solid residue[J]. Journal of Fuel Chemistry and Technology, 2019, 47(1): 39-52.

Citation:

YUAN Song, HUANG Yan-qin, LIU Hua-cai, YUAN Hong-you, ZHUANG Xiu-zheng, YIN Xiu-li, WU Chuang-zhi. Effects of low-temperature hydrothermal pretreatment of high-protein Chlorella sp.on N distribution and thermal degradation of solid residue[J]. Journal of Fuel Chemistry and Technology, 2019, 47(1): 39-52.

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Effects of low-temperature hydrothermal pretreatment of high-protein Chlorella sp.on N distribution and thermal degradation of solid residue

1.
Key Laboratory of Renewable Energy, CAS, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

the National Natural Science Foundation of China 51776207

Science and Technology Program of Guangzhou 201804010153

Natural Science Foundation of Guangdong Province 2017B030308002

More Information

Corresponding author: HUANG Yan-qin, E-mail:huangyq@ms.giec.ac.cn
Received Date: 2018-08-24
Rev Recd Date: 2018-11-05

Available Online: 2021-01-23

Publish Date: 2019-01-10

Abstract

Abstract

Decomposition behavior of Chlorella sp. during low-temperature hydrothermal pretreatment (HTP) were studied. Distribution of various product yields, element components, energy recovery ratio and key elements (i.e., C and N) along with temperature (125-200℃) were investigated. The results show that amounts of C and N are enriched into aqueous phase, and high content of NH₃-N is detected due to deamination reaction above 175℃. During the HTP process, N distribution in oil product first increases gradually and then rapidly increases above 175℃. During the whole low-temperature HTP process, the yield and energy recovery ratio of solid residue decreases continuously. The N/C and O/C ratio of the solid residue also decreases, indicating HPT would promote property of the solid residue. The functional structure and thermal-degradation of Chlorella sp. and its solid residue are then comparatively examined by various techniques including FT-IR, XPS, TG-FTIR-MS and Py-GC/MS. The results show that functional structure of the solid residue is distinguished from that of the raw sample. The relative content of C-C bond increases while that of C-N and C-O bonds decreases. In addition to protein-N and quaternary-N, a low fraction of pyridine-N is also detected in the solid residue. Compared with these from raw material, less NH₃ and HCN are released from solid residue, and less N-containing heterocyclic compounds are generated during rapid pyrolysis.
- high-protein Chlorella sp.,
- low-temperature hydrothermal pretreatment,
- functional structure,
- thermal-decomposition

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References(43)

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