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Study on Catalytic Pyrolysis of Diatom Chaetoceros sp. by Py-GC/MS Technology
Received date: 2015-09-02
Revised date: 2015-10-27
Online published: 2015-12-30
The catalytic pyrolysis characteristics of diatom Chaetoceros sp. powders were investigated by pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS) technology. Using HZSM-5 as catalyst, the effect of Si/Al ratio in HZSM-5, catalyst consumption, pyrolysis heating rate and pyrolysis reaction time on pyrolysis products of diatom Chaetoceros sp. were studied. The results show that the pyrolysis products of diatom Chaetoceros sp. without catalysts are mainly fatty acids with the contents of 50.05%, and the contents of benzenes are only 0.87%. When catalysts were added, the contents of fatty acids are decreased and aromatic compounds are significantly increased. Pyrolysis results suggest that, desired products of 57.76% benzenes and 2.63% fatty acids could be obtained on the conditions of Si/Al ratio of 38, diatom:HZSM-5 at a 1:9 mass ratio, heating rate 10 000oC/s and reaction time of 10 s, which indicates that the reaction of deoxygenation and aromatization significantly happen with HZSM-5(38)’s addition. Thus, HZSM-5(38) is favorable for Diatom Chaetoceros sp. to produce high quality bio-oil products by catalytic pyrolysis.
Key words： catalytic pyrolysis; Py-GC/MS; diatom; HZSM-5; bio-oil
ZHANG Xiao-hong , SU Qiu-cheng , LIN Fu-hua , CHEN Xiao-li , FU Juan . Study on Catalytic Pyrolysis of Diatom Chaetoceros sp. by Py-GC/MS Technology[J]. Advances in New and Renewable Energy, 2015 , 3(6) : 469 -476 . DOI: 10.3969/j.issn.2095-560X.2015.06.010
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