Microalgae co-pyrolysis with waste plastics to prepare low-O/N and hydrocarbon-rich liquid oil

TANG Zi-yue; CHEN Wei; HU Jun-hao; YANG Hai-ping; CHEN Ying-quan; CHEN Han-ping

doi:10.19906/j.cnki.JFCT.2021070

Volume 49 Issue 12

Dec. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(12): 1860-1866

TANG Zi-yue, CHEN Wei, HU Jun-hao, YANG Hai-ping, CHEN Ying-quan, CHEN Han-ping. Microalgae co-pyrolysis with waste plastics to prepare low-O/N and hydrocarbon-rich liquid oil[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1860-1866. doi: 10.19906/j.cnki.JFCT.2021070

Citation:

TANG Zi-yue, CHEN Wei, HU Jun-hao, YANG Hai-ping, CHEN Ying-quan, CHEN Han-ping. Microalgae co-pyrolysis with waste plastics to prepare low-O/N and hydrocarbon-rich liquid oil[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1860-1866. doi: 10.19906/j.cnki.JFCT.2021070

Citation:

TANG Zi-yue, CHEN Wei, HU Jun-hao, YANG Hai-ping, CHEN Ying-quan, CHEN Han-ping. Microalgae co-pyrolysis with waste plastics to prepare low-O/N and hydrocarbon-rich liquid oil[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1860-1866. doi: 10.19906/j.cnki.JFCT.2021070

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Microalgae co-pyrolysis with waste plastics to prepare low-O/N and hydrocarbon-rich liquid oil

doi: 10.19906/j.cnki.JFCT.2021070

State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Funds: The project was supported by the National Natural Science Foundation of China (51906082, 51861130362) and the China Postdoctoral Science Foundation (2019M662617)

Received Date: 2021-05-27
Rev Recd Date: 2021-07-05

Available Online: 2021-08-10

Publish Date: 2021-12-29

Abstract

Abstract

In order to reduce N-/O-compounds content and improve the quality of microalgae bio-oil, the co-pyrolysis/catalytic of Nannochloropsis sp. (NS) and polyethylene (LDPE) were studied in a fixed bed, and the distribution of N and O was discussed, as well as the interaction between microalgae and LDPE and the influence of the addition of catalyst. It was found that co-pyrolysis could effectively inhibit the transformation of O and N to oil, and promote the O release as H₂O and N conversion to gas products. In addition, plastic adding significantly reduced the content of O-/N-compounds in oil, such as carboxylic acid, amide and N-heterocyclic, and increased the aliphatics content. Besides, it effectively promoted the formation of hydrocarbon gas, and showed a certain synergistic effect on CO and H₂, and the interaction reached the maximum at 25%LDPE. Furthermore, ZSM-5 could promote the formation of hydrocarbon gas, increase the LHV of gas products (35.6 MJ/Nm³), and further reduce the nitrogen compounds in the oil, while the N in microalgae transferred to gas, and O converted to gas and H₂O, which resulted in the further reduction of the O and N contents in the oil. Moreover, catalytic co-pyrolysis could inhibit the formation of aromatic hydrocarbons to a certain extent and improve the selectivity of aliphatic hydrocarbons.
- co-pyrolysis/catalysis,
- microalgae,
- LDPE,
- interaction,
- deoxygenation and denitrification

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References(28)

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