Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.)
This study aims to characterize and valorize hemp residual biomass by a slow pyrolysis process. The volatile by-products of hemp carbonization were characterized by several methods (TGA, UV-VIS, TLC, Flash Prep-LC, UHPLC, QTOF-MS) to understand the pyrolysis reaction mechanisms and to identify the c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/9/2794 |
| _version_ | 1827672086312648704 |
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| author | Laetitia Marrot Kristine Meile Mariem Zouari David DeVallance Anna Sandak Rene Herrera |
| author_facet | Laetitia Marrot Kristine Meile Mariem Zouari David DeVallance Anna Sandak Rene Herrera |
| author_sort | Laetitia Marrot |
| collection | DOAJ |
| description | This study aims to characterize and valorize hemp residual biomass by a slow pyrolysis process. The volatile by-products of hemp carbonization were characterized by several methods (TGA, UV-VIS, TLC, Flash Prep-LC, UHPLC, QTOF-MS) to understand the pyrolysis reaction mechanisms and to identify the chemical products produced during the process. The obtained carbon yield was 29%, generating a gaseous stream composed of phenols and furans which was collected in four temperature ranges (F1 at 20–150 °C, F2 at 150–250 °C, F3 at 250–400 °C and F4 at 400–1000 °C). The obtained liquid fractions were separated into subfractions by flash chromatography. The total phenolic content (TPC) varied depending on the fraction but did not correlate with an increase in temperature or with a decrease in pH value. Compounds present in fractions F1, F3 and F4, being mainly phenolic molecules such as guaiacyl or syringyl derivatives issued from the lignin degradation, exhibit antioxidant capacity. The temperature of the pyrolysis process was positively correlated with detectable phenolic content, which can be explained by the decomposition order of the hemp chemical constituents. A detailed understanding of the chemical composition of pyrolysis products of hemp residuals allows for an assessment of their potential valorization routes and the future economic potential of underutilized biomass. |
| first_indexed | 2024-03-10T03:54:50Z |
| format | Article |
| id | doaj.art-a3b7f576695f488cabcc4704190e1336 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T03:54:50Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-a3b7f576695f488cabcc4704190e13362023-11-23T08:49:44ZengMDPI AGMolecules1420-30492022-04-01279279410.3390/molecules27092794Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.)Laetitia Marrot0Kristine Meile1Mariem Zouari2David DeVallance3Anna Sandak4Rene Herrera5InnoRenew CoE, Livade 6, 6310 Izola, SloveniaBiorefinery Laboratory, Latvian State Institute of Wood Chemistry, Str. Dzerbenes 27, LV-1006 Riga, LatviaInnoRenew CoE, Livade 6, 6310 Izola, SloveniaInnoRenew CoE, Livade 6, 6310 Izola, SloveniaInnoRenew CoE, Livade 6, 6310 Izola, SloveniaInnoRenew CoE, Livade 6, 6310 Izola, SloveniaThis study aims to characterize and valorize hemp residual biomass by a slow pyrolysis process. The volatile by-products of hemp carbonization were characterized by several methods (TGA, UV-VIS, TLC, Flash Prep-LC, UHPLC, QTOF-MS) to understand the pyrolysis reaction mechanisms and to identify the chemical products produced during the process. The obtained carbon yield was 29%, generating a gaseous stream composed of phenols and furans which was collected in four temperature ranges (F1 at 20–150 °C, F2 at 150–250 °C, F3 at 250–400 °C and F4 at 400–1000 °C). The obtained liquid fractions were separated into subfractions by flash chromatography. The total phenolic content (TPC) varied depending on the fraction but did not correlate with an increase in temperature or with a decrease in pH value. Compounds present in fractions F1, F3 and F4, being mainly phenolic molecules such as guaiacyl or syringyl derivatives issued from the lignin degradation, exhibit antioxidant capacity. The temperature of the pyrolysis process was positively correlated with detectable phenolic content, which can be explained by the decomposition order of the hemp chemical constituents. A detailed understanding of the chemical composition of pyrolysis products of hemp residuals allows for an assessment of their potential valorization routes and the future economic potential of underutilized biomass.https://www.mdpi.com/1420-3049/27/9/2794residual streamhemp by-productsslow pyrolysisgaseous phasethermal decompositionbiocompounds |
| spellingShingle | Laetitia Marrot Kristine Meile Mariem Zouari David DeVallance Anna Sandak Rene Herrera Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) Molecules residual stream hemp by-products slow pyrolysis gaseous phase thermal decomposition biocompounds |
| title | Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) |
| title_full | Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) |
| title_fullStr | Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) |
| title_full_unstemmed | Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) |
| title_short | Characterization of the Compounds Released in the Gaseous Waste Stream during the Slow Pyrolysis of Hemp (<i>Cannabis sativa</i> L.) |
| title_sort | characterization of the compounds released in the gaseous waste stream during the slow pyrolysis of hemp i cannabis sativa i l |
| topic | residual stream hemp by-products slow pyrolysis gaseous phase thermal decomposition biocompounds |
| url | https://www.mdpi.com/1420-3049/27/9/2794 |
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