Synergistic effects on co-pyrolysis of low-temperature hydrothermally pretreated high-protein microalgae and polypropylene

doi:10.1016/j.enconman.2020.113772

	Synergistic effects on co-pyrolysis of low-temperature hydrothermally pretreated high-protein microalgae and polypropylene
	Lv, Xianchao 1,2,3; Liu, Huacai 1,2; Huang, Yanqin 1,2,4; Yao, Jiagui 1,2,3; Yuan, Hongyou 1,2; Yin, Xiuli 1,2; Wu, Chuangzhi 1,2,3
刊名	ENERGY CONVERSION AND MANAGEMENT
	2021-02-01
卷号	229 页码:13
关键词	High-protein microalgae Polypropylene Hydrothermal pretreatment Co-pyrolysis Synergistic effect
ISSN号	0196-8904
DOI	10.1016/j.enconman.2020.113772
通讯作者	Huang, Yanqin(huangyq@ms.giec.ac.cn)
英文摘要	Protein-rich (58.50%) Chlorella sp. was hydrothermally pretreated at 175 degrees C to remove part of N, and the obtained solid residue (ChSR) was then co-pyrolyzed with polypropylene (PP) to reduce O content and improve biooil quality. About 48.25% of N was enriched into the aqueous phase during hydrothermal pretreatment (HTP) process, and about 15.70% of bio-oil with low N content (3.45%) was obtained. Compared with that of raw sample, the structure of ChSR was further aromatized as revealed by C-13 NMR analysis. The interaction between ChSR and PP was deeply investigated with the help of online TG-FTIR-MS and Py-GC/MS. The co-pyrolysis process of ChSR-PP blends was generally divided into two thermal decomposition stages. The first stage (150-400 degrees C) was mainly associated with decomposition of ChSR, while the second stage (400-550 degrees C) was the results of combination of thermal degradations of ChSR and PP, with the primary contribution from the degradation of PP. The addition of PP accelerated pyrolysis of ChSR and inhibited the release of C2H5O+/COOH+ and NH3 but promoted CO2 releasing at the first stage. However, ChSR delayed the pyrolysis of PP and prohibited release of H2 and light hydrocarbons (i.e., CH4, C2H2, C2H6, C3H7, and so on) from PP at the second stage. Kinetic analysis based on the Flynn-Wall-Ozawa (FWO) method revealed that the average activation energy (E) of the blends at the two decomposition stages were 159.10-164.12 kJ/kg and 194.20-219.86 kJ/kg, respectively. Results of Py-GC/MS indicated that, the synergistic effect between ChSR and PP significantly enhanced the formation of hydrocarbons (i.e., cyclohexane derivatives and 2,4-Dimethyl-1-heptene), and the interaction achieved maximum when the ratio of ChSR:PP was 80:20. The yields of O-containing compounds (alcohols, and phenols) and BTEXs (Benzene series) were decreased. It should be noted that both the amounts and kinds of N-heterocyclic compounds were decreased. Finally, the possible mechanism on interaction between ChSR and PP was also proposed. This work will provide useful information on better utilization of high-protein microalgae.
资助项目	National Natural Science Foundation of China[51776207] ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund ; CAS[DNL 180306] ; Natural Science Foundation of Guangdong Province, China[2019A1515011535] ; Science and Technology Program of Guangzhou, China[201804010153]
WOS研究方向	Thermodynamics ; Energy & Fuels ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000614050500006
资助机构	National Natural Science Foundation of China ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund ; CAS ; Natural Science Foundation of Guangdong Province, China ; Science and Technology Program of Guangzhou, China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32665]
专题	中国科学院广州能源研究所
通讯作者	Huang, Yanqin
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 4.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Lv, Xianchao,Liu, Huacai,Huang, Yanqin,et al. Synergistic effects on co-pyrolysis of low-temperature hydrothermally pretreated high-protein microalgae and polypropylene[J]. ENERGY CONVERSION AND MANAGEMENT,2021,229:13.
APA	Lv, Xianchao.,Liu, Huacai.,Huang, Yanqin.,Yao, Jiagui.,Yuan, Hongyou.,...&Wu, Chuangzhi.(2021).Synergistic effects on co-pyrolysis of low-temperature hydrothermally pretreated high-protein microalgae and polypropylene.ENERGY CONVERSION AND MANAGEMENT,229,13.
MLA	Lv, Xianchao,et al."Synergistic effects on co-pyrolysis of low-temperature hydrothermally pretreated high-protein microalgae and polypropylene".ENERGY CONVERSION AND MANAGEMENT 229(2021):13.