A Fresnel lens minireactor to study the chemistry of solar pyro-gasification of biomass
| Autor: | D. Fabbri, C. Torri, G.M. Ong, P. Massoli |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | 42nd MEETING OF THE ITALIAN SECTION OF THE COMBUSTION INSTITUTE, Ravenna, 9-11 settembre info:cnr-pdr/source/autori:D. Fabbri, C. Torri, G.M. Ong, P. Massoli/congresso_nome:42nd MEETING OF THE ITALIAN SECTION OF THE COMBUSTION INSTITUTE/congresso_luogo:Ravenna/congresso_data:9-11 settembre/anno:2019/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | This contribution describes the construction and application of a simple low-cost analytical solar pyrolysis minireactor. The minireactor consisted of a quartz tube mounted over a trolley equipped with a Fresnel lens which had movable parts in principle workable for passive sun tracking. Solar pyrolysis experiments were conducted by irradiating 100 mg of softwood or herbaceous biomass positioned at the focus of the Fresnel lens. After solar pyrolysis, three fractions could be isolated: solid (biochar), liquid (bio-oil) and non-condensable gas (gas). Biochar was characterized by elemental and proximate analysis, bio-oil by gas chromatography-mass spectrometry (GC-MS) with and without silylation, and gas by GC-TCD (gas chromatography-thermal conductivity detector). Biochar of pine wood had a content of carbon 70% and H/C molar ratio of 0.60. The bio-oil was characterized by high levels of levoglucosan, methoxyphenols, dihydroxybenzenes and abietic acid derivatives. Lignin dimers were also revealed. The gas composition was dominated by CO and CO2 and lower levels of light hydrocarbons. The precision of data from the mini reactor was satisfactorily. The results from corn stalk was more variable probably due to the high amount of ash. The yields of the fractions and their chemical composition were similar to those obtained by intermediate pyrolysis at about 450-500 °C under electrical heating. The results obtained from the minireactor enabled to obtain quali-quantitative data useful to understand the chemistry of the thermal conversion of biomass assisted by concentrated solar radiation. |
| Databáze: | OpenAIRE |
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