Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis
The study focuses on the thermal analysis and flash pyrolysis of bark of Siberian larch (Larix sibirica Ledeb.) and Scots pine (Pinus sylvestris L.). Using thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC), a number of patterns of thermal decomposition of bark were established. T...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, Siberian Branch Publishing House
2022-08-01
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| Series: | Сибирский лесной журнал |
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| Online Access: | https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/a1b/a1b727626f41ea36aba0433adecee414.pdf |
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| author | E. A. Petrunina S. R. Loskutov T. V. Ryazanova A. A. Aniskina G. V. Permyakova V. V. Stasova |
| author_facet | E. A. Petrunina S. R. Loskutov T. V. Ryazanova A. A. Aniskina G. V. Permyakova V. V. Stasova |
| author_sort | E. A. Petrunina |
| collection | DOAJ |
| description | The study focuses on the thermal analysis and flash pyrolysis of bark of Siberian larch (Larix sibirica Ledeb.) and Scots pine (Pinus sylvestris L.). Using thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC), a number of patterns of thermal decomposition of bark were established. The fourth derivatives of the DTG contours revealed differences in the “fractionality” of mass loss during heating of the bark samples. The thermal decomposition kinetics of bark was investigated using the Ozawa – Flynn – Wall isoconversion method. The obtained dependence of the activation energy (Ea) on the conversion degree was used to calculate the thermodynamic parameters (ΔH, ΔG and ΔS) of thermal decomposition. The mean values of Ea, ΔH, ΔG and ΔS were 206.7, 201.1, 248.7 kJ/mol and –78.0 J/(mol×K) for larch bark (LB) and 235.3, 229.7, 310.6 kJ/mol and –129.4 J/(mol×K) for pine bark (PB). The composition of mono-, sesqui-, diterpenes and oxygen-containing hydrocarbons of bark was determined by headspace GC/MS analysis. 37 and 41 volatile organic compounds were identified for LB and PB, respectively. The thermal stability of LB and PB was characterized using recalcitrant indices calculated from TG and DSC data. Integral values of exothermic effects of thermo-oxidative degradation were 15.1 kJ/g for LB and 15.9 kJ/g for PB. 55 flash pyrolysis products were identified, which accounted for 77.6 % of the total peak area for LB and 89.7 % for PB. |
| first_indexed | 2024-04-12T22:59:37Z |
| format | Article |
| id | doaj.art-e5fbf572130242478afb84e1a6959ab0 |
| institution | Directory Open Access Journal |
| issn | 2311-1410 2312-2099 |
| language | English |
| last_indexed | 2024-04-12T22:59:37Z |
| publishDate | 2022-08-01 |
| publisher | Russian Academy of Sciences, Siberian Branch Publishing House |
| record_format | Article |
| series | Сибирский лесной журнал |
| spelling | doaj.art-e5fbf572130242478afb84e1a6959ab02022-12-22T03:13:06ZengRussian Academy of Sciences, Siberian Branch Publishing HouseСибирский лесной журнал2311-14102312-20992022-08-0194354910.15372/SJFS20220404Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysisE. A. Petrunina0S. R. Loskutov1T. V. Ryazanova2A. A. Aniskina3G. V. Permyakova4V. V. Stasova5V. N. Sukachev Institute of Forest, Russian Academy of Science, Siberian Branch Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian BranchV. N. Sukachev Institute of Forest, Russian Academy of Science, Siberian Branch Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian BranchReshetnev Siberian State University of Science and TechnologyV. N. Sukachev Institute of Forest, Russian Academy of Science, Siberian Branch Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian BranchV. N. Sukachev Institute of Forest, Russian Academy of Science, Siberian Branch Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian BranchV. N. Sukachev Institute of Forest, Russian Academy of Science, Siberian Branch Federal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian BranchThe study focuses on the thermal analysis and flash pyrolysis of bark of Siberian larch (Larix sibirica Ledeb.) and Scots pine (Pinus sylvestris L.). Using thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC), a number of patterns of thermal decomposition of bark were established. The fourth derivatives of the DTG contours revealed differences in the “fractionality” of mass loss during heating of the bark samples. The thermal decomposition kinetics of bark was investigated using the Ozawa – Flynn – Wall isoconversion method. The obtained dependence of the activation energy (Ea) on the conversion degree was used to calculate the thermodynamic parameters (ΔH, ΔG and ΔS) of thermal decomposition. The mean values of Ea, ΔH, ΔG and ΔS were 206.7, 201.1, 248.7 kJ/mol and –78.0 J/(mol×K) for larch bark (LB) and 235.3, 229.7, 310.6 kJ/mol and –129.4 J/(mol×K) for pine bark (PB). The composition of mono-, sesqui-, diterpenes and oxygen-containing hydrocarbons of bark was determined by headspace GC/MS analysis. 37 and 41 volatile organic compounds were identified for LB and PB, respectively. The thermal stability of LB and PB was characterized using recalcitrant indices calculated from TG and DSC data. Integral values of exothermic effects of thermo-oxidative degradation were 15.1 kJ/g for LB and 15.9 kJ/g for PB. 55 flash pyrolysis products were identified, which accounted for 77.6 % of the total peak area for LB and 89.7 % for PB.https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/a1b/a1b727626f41ea36aba0433adecee414.pdfbarklarchpinethermal analisisanalytical pyrolysis |
| spellingShingle | E. A. Petrunina S. R. Loskutov T. V. Ryazanova A. A. Aniskina G. V. Permyakova V. V. Stasova Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis Сибирский лесной журнал bark larch pine thermal analisis analytical pyrolysis |
| title | Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis |
| title_full | Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis |
| title_fullStr | Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis |
| title_full_unstemmed | Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis |
| title_short | Comparative analysis of physical-chemical properties of larch and pine bark: thermal analysis and analytical pyrolysis |
| title_sort | comparative analysis of physical chemical properties of larch and pine bark thermal analysis and analytical pyrolysis |
| topic | bark larch pine thermal analisis analytical pyrolysis |
| url | https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/a1b/a1b727626f41ea36aba0433adecee414.pdf |
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