Chemical properties of biosilica and bio-oil derived from fast pyrolysis of Melosira varians
•Fast pyrolysis of diatom Melosira varians generate high yields of biosilica.•Bio-oil produced at 400–500°C is mainly composed by fatty acids as palmitic and myristic acids.•Capacitive properties of diatom solids are poor but its composites with CNT substantially improved the electrochemical perform...
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| Published in | Journal of analytical and applied pyrolysis Vol. 127; pp. 402 - 410 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.09.2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0165-2370 1873-250X |
| DOI | 10.1016/j.jaap.2017.07.009 |
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| Abstract | •Fast pyrolysis of diatom Melosira varians generate high yields of biosilica.•Bio-oil produced at 400–500°C is mainly composed by fatty acids as palmitic and myristic acids.•Capacitive properties of diatom solids are poor but its composites with CNT substantially improved the electrochemical performance.
This study examined bio-oil and solid products generated from the diatom Melosira varians by fast pyrolysis using a fixed-bed reactor with inert gas flow and a vacuum medium. The effect of temperature (300–700°C) on product yields, the bio-oil composition and the properties of the solid fraction were evaluated. It was found that the most suitable temperature to obtain significant amounts of high-quality bio-oil (29% yield) was 450°C, at which point fatty acids appeared as main components. Under all operating conditions a solid material, mainly composed of siliceous frustules, was the most abundant product (59–88% yield). These materials were exhaustively characterized by SEM microscopy, Raman and FT-IR spectroscopy, XRD, elemental analysis and BET surface analyses. The structure and morphology of the biosilica were practically unaltered in the studied temperature range. The conductivity properties of the solids derived from diatom and their composites with carbon nanotubes were determined using cyclic voltammetry. |
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| AbstractList | This study examined bio-oil and solid products generated from the diatom Melosira varians by fast pyrolysis using a fixed-bed reactor with inert gas flow and a vacuum medium. The effect of temperature (300–700°C) on product yields, the bio-oil composition and the properties of the solid fraction were evaluated. It was found that the most suitable temperature to obtain significant amounts of high-quality bio-oil (29% yield) was 450°C, at which point fatty acids appeared as main components. Under all operating conditions a solid material, mainly composed of siliceous frustules, was the most abundant product (59–88% yield). These materials were exhaustively characterized by SEM microscopy, Raman and FT-IR spectroscopy, XRD, elemental analysis and BET surface analyses. The structure and morphology of the biosilica were practically unaltered in the studied temperature range. The conductivity properties of the solids derived from diatom and their composites with carbon nanotubes were determined using cyclic voltammetry. •Fast pyrolysis of diatom Melosira varians generate high yields of biosilica.•Bio-oil produced at 400–500°C is mainly composed by fatty acids as palmitic and myristic acids.•Capacitive properties of diatom solids are poor but its composites with CNT substantially improved the electrochemical performance. This study examined bio-oil and solid products generated from the diatom Melosira varians by fast pyrolysis using a fixed-bed reactor with inert gas flow and a vacuum medium. The effect of temperature (300–700°C) on product yields, the bio-oil composition and the properties of the solid fraction were evaluated. It was found that the most suitable temperature to obtain significant amounts of high-quality bio-oil (29% yield) was 450°C, at which point fatty acids appeared as main components. Under all operating conditions a solid material, mainly composed of siliceous frustules, was the most abundant product (59–88% yield). These materials were exhaustively characterized by SEM microscopy, Raman and FT-IR spectroscopy, XRD, elemental analysis and BET surface analyses. The structure and morphology of the biosilica were practically unaltered in the studied temperature range. The conductivity properties of the solids derived from diatom and their composites with carbon nanotubes were determined using cyclic voltammetry. |
| Author | Daga, I. Claudia Piloni, Roxana V. Brunetti, Verónica Urcelay, R. Carlos Moyano, E. Laura |
| Author_xml | – sequence: 1 givenname: Roxana V. surname: Piloni fullname: Piloni, Roxana V. organization: INFIQC (CONICET-Universidad Nacional de Córdoba), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Córdoba, Argentina – sequence: 2 givenname: Verónica surname: Brunetti fullname: Brunetti, Verónica organization: INFIQC (CONICET-Universidad Nacional de Córdoba), Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Córdoba, Argentina – sequence: 3 givenname: R. Carlos surname: Urcelay fullname: Urcelay, R. Carlos organization: IMBIV (CONICET – Universidad Nacional de Córdoba), Facultad de Ciencias Exactas, Físicas y Naturales, Córdoba, Argentina – sequence: 4 givenname: I. Claudia surname: Daga fullname: Daga, I. Claudia organization: IMBIV (CONICET – Universidad Nacional de Córdoba), Facultad de Ciencias Exactas, Físicas y Naturales, Córdoba, Argentina – sequence: 5 givenname: E. Laura surname: Moyano fullname: Moyano, E. Laura email: lauramoy@fcq.unc.edu.ar organization: INFIQC (CONICET-Universidad Nacional de Córdoba), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Córdoba, Argentina |
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| CitedBy_id | crossref_primary_10_1016_j_renene_2018_12_111 crossref_primary_10_3390_en16196936 crossref_primary_10_1080_17597269_2022_2118779 crossref_primary_10_1016_j_crgsc_2021_100084 crossref_primary_10_1016_j_algal_2021_102206 crossref_primary_10_1007_s42452_020_03730_x crossref_primary_10_1016_j_jaap_2021_105379 crossref_primary_10_1038_s43247_022_00582_8 |
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| Keywords | Diatom Biosilica Microalgae Biomass Fast pyrolysis |
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| Snippet | •Fast pyrolysis of diatom Melosira varians generate high yields of biosilica.•Bio-oil produced at 400–500°C is mainly composed by fatty acids as palmitic and... This study examined bio-oil and solid products generated from the diatom Melosira varians by fast pyrolysis using a fixed-bed reactor with inert gas flow and a... |
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| SubjectTerms | Bacillariophyceae biofuels Biomass Biosilica carbon nanotubes Diatom Fast pyrolysis fatty acids Fourier transform infrared spectroscopy Melosira Microalgae physicochemical properties pyrolysis scanning electron microscopy temperature X-ray diffraction |
| Title | Chemical properties of biosilica and bio-oil derived from fast pyrolysis of Melosira varians |
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