The direct pyrolysis and catalytic pyrolysis of Nannochloropsis sp. residue for renewable bio-oils.
Nannochloropsis sp. (a kind of green microalga) residue was pyrolyzed without catalyst or with different amount of HZSM-5 catalyst in a fixed bed reactor in nitrogen flow. The effects of pyrolysis parameters such as temperature and catalyst-to-material ratio on product yields were studied. The bio-oils obtained were analyzed by elemental, GC-MS and FTIR analysis. The results indicated that the bio-oils from catalytic pyrolysis of Nannochloropsis sp. residue (BOCP) had lower oxygen content (19.5 wt.%) and higher heating-value (32.7 MJ kg(-1)) than those obtained from direct pyrolysis (BODP) which had an oxygen content of 30.1 wt.% and heating-value of 24.6 MJ kg(-1). The BODP mainly consisted of long carbon chain compounds with various terminal groups (LCTG), while the BOCP mainly consisted of aromatic hydrocarbons. These properties of bio-oils demonstrated that the Nannochloropsis sp. residue can be used as a renewable energy resource and chemical feedstock.
Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
Pan
P
Pan
Changwei
C
Hu
Wenyan
W
Yang
Yuesong
Y
Li
Linlin
L
Dong
Liangfang
L
Zhu
Dongmei
D
Tong
Renwei
R
Qing
Yong
Y
Fan
D001674:Bioelectric Energy Sources; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002384:Catalysis / Q000187:drug effects; D003246:Conservation of Energy Resources; D056890:Eukaryota / Q000737:chemistry* / Q000187:drug effects; D005740:Gases / Q000032:analysis; D006358:Hot Temperature; D008670:Metals / Q000494:pharmacology
D056804:Biofuels; D005740:Gases; D008670:Metals