Fractionated pyrolysis coupled to gas chromatography and mass spectrometry (Py-GC/MS) appears as an interesting analytical tool for elucidating lignocellulosic biomass structure, as it allows the progressive release of chemical fragments representative of biomass macromolecular composition. In this paper the effect of fractionated pyrolysis time (from 5 s to 300 s) on the degradation of lignin and carbohydrates from beech wood was studied at temperatures between 250 \u00b0C and 500 \u00b0C. Fractionated Py-GC/MS showed that the release temperature of the volatile degradation products varied between the volatile species detected. In addition, the step duration time changed the thermal degradation behavior of lignocellulosic components. Shortening the constant step duration time from 300 s to 5 s shifted the maximum weight loss to the higher temperatures. The result was opposite at long step duration times. Time optimization at each pyrolysis temperature (250 \u00b0C, 40 s; 300 \u00b0C, 30 s; 350 \u00b0C, 25 s; 370 \u00b0C, 20 s; 400 \u00b0C, 15 s; 450 \u00b0C, 10 s; 500 \u00b0C, 5 s) enhanced the yield of both lignin and carbohydrate volatile pyrolysis degradation products. In addition, two multiple temperature maxima were shown for some lignin and carbohydrate derivatives. This behavior may be due to the two different pathways of formation and macromolecular origins of compounds in beech wood. At optimized conditions lignin derivatives having a 3-carbon side chain substituent had a maximum at lower temperature than that of lignin derivatives with a 1-carbon side chain substituent. That phenomenon follows the order of primary and secondary pyrolysis reactions. Similar behaviors were observed among the degradation products of hemicelluloses and cellulose. Degradation products of hemicelluloses were mainly released at lower temperatures than those of cellulose derivatives, which illustrates the lower thermal stability of hemicelluloses compared to cellulose.
", "keywords": ["Beech", "ta114", "[CHIM.GENI] Chemical Sciences/Chemical engineering", "[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "Fractionated pyrolysis", "Carbohydrates", "0211 other engineering and technologies", "02 engineering and technology", "540", "Py-GC/MS", "Lignin", "7. Clean energy", "13. Climate action", "Thermal degradation", "0202 electrical engineering", " electronic engineering", " information engineering", "G\u00e9nie chimique", "SDG 7 - Affordable and Clean Energy", "G\u00e9nie des proc\u00e9d\u00e9s", "ta116", "ta215"]}, "links": [{"href": "https://oatao.univ-toulouse.fr/27243/1/GonzalezMartinez_27243.pdf"}, {"href": "https://doi.org/10.1016/j.jaap.2018.11.026"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Analytical%20and%20Applied%20Pyrolysis", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jaap.2018.11.026", "name": "item", "description": "10.1016/j.jaap.2018.11.026", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jaap.2018.11.026"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-01-01T00:00:00Z"}}, {"id": "10.1016/j.jenvman.2019.02.019", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:16:51Z", "type": "Journal Article", "created": "2019-02-14", "title": "Assessing the suitability of recovering shrub biowaste involved in wildland fires in the South of Europe through torrefaction mobile units", "description": "Several types of shrubs and oak inducing high wildland fire risk in the South of Europe were evaluated for their potential valorization through torrefaction. Biomasses were firstly characterized in terms of macromolecular and elemental composition. Lab-scale TGA-GC/MS torrefaction experiments allowed the in-depth study of the solid mass transformation and the production profile of 23 volatile species (200 to 300\u202f\u00b0C at 3\u202f\u00b0C\u00b7min-1 and 300\u202f\u00b0C for 30\u202fmin). The proportion of the torrefied products (solid, CO, CO2, water and volatile species) was evaluated through mass balance in a lab-scale furnace under typical torrefaction conditions (300\u202f\u00b0C, 40\u202fmin). The results show a similar characterization and behavior in torrefaction for oak and shrublands, and slightly different characteristics for fern. However, fern may grow separately from shrublands and is considered to present a low fire risk. This suggests that the in-situ direct valorization of these biomasses through torrefaction mobile units seems promising. However, other properties, such as density, flowability and grindability need to be studied to confirm the feasibility of the process. Regarding torrefaction products, a higher carbon content and an interesting increase in heating value were measured for the torrefied solid, which makes it suitable for energetic valorization, among other uses. The composition of permanent gases was evaluated and found in agreement with previous studies. Finally, the volatile species released were studied in function of the torrefaction temperature, in view of their possible valorization as green chemicals.", "keywords": ["[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "Volatile species", "0211 other engineering and technologies", "02 engineering and technology", "333", "Torrefaction", "Wildfires", "[CHIM.GENI]Chemical Sciences/Chemical engineering", "0202 electrical engineering", " electronic engineering", " information engineering", "G\u00e9nie chimique", "[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering", "SDG 7 - Affordable and Clean Energy", "Biomass", "G\u00e9nie des proc\u00e9d\u00e9s", "ta215", "ta218", "660", "[SDE.IE]Environmental Sciences/Environmental Engineering", "[CHIM.GENI] Chemical Sciences/Chemical engineering", "Temperature", "Solid mass loss", "15. Life on land", "Europe", "Oak", "[SDE.IE] Environmental Sciences/Environmental Engineering", "Shrubs", "Gases", "Wildland fire"]}, "links": [{"href": "https://oatao.univ-toulouse.fr/24261/1/Gonzalez%20Martinez_24261.pdf"}, {"href": "https://doi.org/10.1016/j.jenvman.2019.02.019"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jenvman.2019.02.019", "name": "item", "description": "10.1016/j.jenvman.2019.02.019", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jenvman.2019.02.019"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-04-01T00:00:00Z"}}, {"id": "10.1016/j.jenvman.2019.02.120", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:16:51Z", "type": "Journal Article", "created": "2019-03-06", "title": "Distribution trend of trace elements in digestate exposed to air: Laboratory-scale investigations using DGT-based fractionation", "description": "The use of digestate as amendment for agricultural soils has already been proposed as an alternative to mineral fertilizers or undigested organic matter. However, little information is available concerning the effect of digestate atmospheric exposure on trace elements speciation and, consequently, on their mobility and bio-accessibility when digestate is stored in open tanks or handled before land spreading. In this study, we investigated at laboratory-scale the effect of digestate aeration on the distribution of Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Se and W using the diffusive gradients in thin films technique (DGT)-based fractionation. For this purpose, experiments were performed to assess the variation in distribution between the labile, soluble and particulate fractions over time in digested sewage sludge during passive and forced aeration. Results showed that aeration promoted a dissolution of Al, As, Co, Cr, Cu, Fe, Mn, Mo and Pb, suggesting a possible increase in their mobility that may likely occur during storage in open tanks or handling before land spreading. Labile elements' fraction increased only during forced aeration (except for Fe and Mn), suggesting that their short-term bio-accessibility can increase only after significant aeration as the one assumed to occur when land spreading takes place.", "keywords": ["550", "[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "Speciation", "[SDU.STU]Sciences of the Universe [physics]/Earth Sciences", "Diffusive gradients in thin films (DGT)", "Chemical Fractionation", "01 natural sciences", "630", "Soil", "Digested sewage sludge", "[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering", "Fractionation", "Diffusive gradients in thin films (DGT); Digested sewage sludge; Fractionation; Metalloids; Metals; Speciation; Chemical Fractionation; Environmental Monitoring; Sewage; Soil; Trace Elements", "Metalloids", "0105 earth and related environmental sciences", "2. Zero hunger", "Sewage", "04 agricultural and veterinary sciences", "15. Life on land", "6. Clean water", "Trace Elements", "Metals", "13. Climate action", "[SDU.STU] Sciences of the Universe [physics]/Earth Sciences", "0401 agriculture", " forestry", " and fisheries", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1016/j.jenvman.2019.02.120"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jenvman.2019.02.120", "name": "item", "description": "10.1016/j.jenvman.2019.02.120", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jenvman.2019.02.120"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-05-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2020.137065", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:17:08Z", "type": "Journal Article", "created": "2020-02-01", "title": "A new circular business model typology for creating value from agro-waste", "description": "Shifting from a linear to a circular economy in the agrifood domain requires innovative business models, including reverse logistics, new visions on customer-supplier relationships, and new forms of organization and marketing strategies at the crossroads of various value chains. This research aims to identify and characterise different types of business models that create value from agricultural waste and by-products via cascading or closing loops. Conceptual and management insights into circular business models are still sparse. In total, 39 cases have been studied that convert agro-waste and by-products into valuable products via a circular economy approach. Semi-structured interviews and on-site visits of six representative cases have been done, and secondary data been collected. Data has been treated with content analysis. Cases are presented according to the type of organisational structure, resources, transformation processes, value propositions, key partners, customers, strategic approaches and innovation. Six types of circular business models are identified and discussed: biogas plant, upcycling entrepreneurship, environmental biorefinery, agricultural cooperative, agropark and support structure. They differ in their way of value creation and organisational form, but strongly depend on partnerships and their capacity to respond to changing external conditions. This study offers the first circular business model typology within the agricultural domain, revealing the interconnectedness of the six different business model types. It provides options for managers in positioning and adapting their business strategies. It highlights the potential of using biomass first for higher added-value products before exploiting it as energy source. Cascading biomass valorisation at a territorial level will increasingly be important for locally cooperating actors within a circular bioeconomy approach.", "keywords": ["2. Zero hunger", "Circular economy", "[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "05 social sciences", "[SDV.IDA] Life Sciences [q-bio]/Food engineering", "650", "Bioeconomy", "Business models", "01 natural sciences", "7. Clean energy", "12. Responsible consumption", "[SDV.IDA]Life Sciences [q-bio]/Food engineering", "0502 economics and business", "8. Economic growth", "Agro-waste valorisation", "[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering", "Networks", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://hal.inrae.fr/hal-02624927/file/2020_Donner_Gohier_Science_Total_Environment_1.pdf"}, {"href": "https://doi.org/10.1016/j.scitotenv.2020.137065"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2020.137065", "name": "item", "description": "10.1016/j.scitotenv.2020.137065", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2020.137065"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-05-01T00:00:00Z"}}, {"id": "10.3390/agronomy7040066", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:21:49Z", "type": "Journal Article", "created": "2017-09-27", "description": "A field study was conducted in northern France over two consecutive years to evaluate the combined effect of conventional tillage (CT) vs no till (NT) with or without cover crops (cc) and nitrogen (N) fertilization on various agronomic traits related to N use efficiency in winter wheat. Five years after conversion of CT to NT, significant increases in N use efficiency, N utilization efficiency, N agronomic efficiency, N partial factor productivity, N apparent recovery fraction and N remobilization were observed under three N fertilization regimes (0, 161, 215 kg ha\uffe2\uff88\uff921). It was also observed that grain yield and grain N content were similar under CT and NT. The N nutrition index was higher under NT at the three rates of N fertilization. Moreover, N use efficiency related traits were increased in the presence of cc both under NT and CT. Thus, agronomic practices based on continuous NT in the presence of cc, appear to be promising strategies to increase N use efficiency in wheat, while reducing both the use and the loss of N-based fertilizers.
", "keywords": ["0106 biological sciences", "2. Zero hunger", "[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering", "S", "[SDV]Life Sciences [q-bio]", "grain yield", "nitrogen application", "Agriculture", "04 agricultural and veterinary sciences", "[SDV.IDA] Life Sciences [q-bio]/Food engineering", "01 natural sciences", "630", "nitrogen use efficiency", "winter wheat", "[SDV] Life Sciences [q-bio]", "nitrogen use efficiency;tillage system;cover crops;nitrogen application;grain yield;winter wheat", "[SDV.IDA]Life Sciences [q-bio]/Food engineering", "[SDV.BV]Life Sciences [q-bio]/Vegetal Biology", "0401 agriculture", " forestry", " and fisheries", "[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering", "[SDV.BV] Life Sciences [q-bio]/Vegetal Biology", "nitrogen use efficiency; tillage system; cover crops; nitrogen application; grain yield; winter wheat", "cover crops", "nitrogen application ; nitrogen use efficiency ; tillage system ; winter wheat ; grain yield ; cover crops", "tillage system"], "contacts": [{"organization": "Habbib, Hazzar, Hirel, Bertrand, Verzeaux, Julien, Roger, David, Lacoux, J\u00e9r\u00f4me, Lea, Peter, Dubois, Fr\u00e9d\u00e9ric, T\u00e9tu, Thierry,", "roles": ["creator"]}]}, "links": [{"href": "http://www.mdpi.com/2073-4395/7/4/66/pdf"}, {"href": "https://doi.org/10.3390/agronomy7040066"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agronomy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/agronomy7040066", "name": "item", "description": "10.3390/agronomy7040066", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/agronomy7040066"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-09-27T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=%5BSPI.GPROC%5D+Engineering+Sciences+%5Bphysics%5D%2FChemical+and+Process+Engineering&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=%5BSPI.GPROC%5D+Engineering+Sciences+%5Bphysics%5D%2FChemical+and+Process+Engineering&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=%5BSPI.GPROC%5D+Engineering+Sciences+%5Bphysics%5D%2FChemical+and+Process+Engineering&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=%5BSPI.GPROC%5D+Engineering+Sciences+%5Bphysics%5D%2FChemical+and+Process+Engineering&offset=9", "hreflang": "en-US"}], "numberMatched": 9, "numberReturned": 9, "distributedFeatures": [], "timeStamp": "2026-04-16T00:31:25.347117Z"}