Publicação
Liquefaction and chemical composition of walnut shells
| Resumo: | The cultivation of walnut (Juglans regia L.) for the exploitation of the fruit has been increasingly recognized worldwide; therefore, it is important to valorize a large amount of biomass from walnut shells (WS), where liquefaction may play an important role. This work intends to contribute to an improved understanding of the best uses for this material. The assays were made with a binary mixture of ethylene glycol and glycerol (1:1 v/v) as solvents, catalyzed by sulfuric acid. The tested parameters were as follows: particle size >0.420– 0.177mm, temperature 140–200°C, and reaction time between 15 and 60min. The initial dried material, the liquefied material, and the resulting solid residue were analyzed by FTIRATR for polyol characterization. The results showed that WS are mostly composed of lignin with 35.0% and polysaccharides, 30.0% cellulose and 24.9% hemicelluloses. High-lignin content indicated that WS might be used as a bio-fuel or adhesives. Extractives represent 10.2% with almost half (4.6%) of polar extractives. The best conditions to attain the optimal liquefaction yield were 160°C, 30min, and 0.420–0.250mm particle size, for the tested parameters. FTIR spectrum of the liquefied material is very different from the original material, and solid residue spectra seem to indicate that there is higher liquefaction of polysaccharides when compared with lignin since there is a higher absorption at 1,600 cm−1 and lower absorption at 1,040 cm−1 and that liquefied compounds are probably in smaller molecules. |
|---|---|
| Autores principais: | Domingos, Idalina |
| Outros Autores: | Ferreira, José; Cruz-Lopes, Luísa; Esteves, Bruno |
| Assunto: | walnut shells chemical composition polyalcohol liquefaction biomass |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Viseu |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Viseu |
| _version_ | 1863854320286433280 |
|---|---|
| author | Domingos, Idalina |
| author2 | Ferreira, José Cruz-Lopes, Luísa Esteves, Bruno |
| author2_role | author author author |
| author_facet | Domingos, Idalina Ferreira, José Cruz-Lopes, Luísa Esteves, Bruno |
| author_role | author |
| contributor_name_str_mv | Instituto Politécnico de Viseu |
| country_str | PT |
| creators_json_str | [{\"Person.name\":\"Domingos, Idalina\",\"Person.identifier.orcid\":\"0000-0002-4308-1563\"},{\"Person.name\":\"Ferreira, José\",\"Person.identifier.orcid\":\"0000-0001-7596-8065\"},{\"Person.name\":\"Cruz-Lopes, Luísa\",\"Person.identifier.orcid\":\"0000-0001-6502-7202\"},{\"Person.name\":\"Esteves, Bruno\",\"Person.identifier.orcid\":\"0000-0001-6660-3128\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Instituto Politécnico de Viseu |
| datacite.creators.creator.creatorName.fl_str_mv | Domingos, Idalina Ferreira, José Cruz-Lopes, Luísa Esteves, Bruno |
| datacite.date.Accepted.fl_str_mv | 2022-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2023-01-04T15:00:28Z |
| datacite.date.embargoed.fl_str_mv | 2023-01-04T15:00:28Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | walnut shells chemical composition polyalcohol liquefaction biomass |
| datacite.titles.title.fl_str_mv | Liquefaction and chemical composition of walnut shells |
| dc.contributor.none.fl_str_mv | Instituto Politécnico de Viseu |
| dc.creator.none.fl_str_mv | Domingos, Idalina Ferreira, José Cruz-Lopes, Luísa Esteves, Bruno |
| dc.date.Accepted.fl_str_mv | 2022-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2023-01-04T15:00:28Z |
| dc.date.embargoed.fl_str_mv | 2023-01-04T15:00:28Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.19/7496 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | walnut shells chemical composition polyalcohol liquefaction biomass |
| dc.title.fl_str_mv | Liquefaction and chemical composition of walnut shells |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The cultivation of walnut (Juglans regia L.) for the exploitation of the fruit has been increasingly recognized worldwide; therefore, it is important to valorize a large amount of biomass from walnut shells (WS), where liquefaction may play an important role. This work intends to contribute to an improved understanding of the best uses for this material. The assays were made with a binary mixture of ethylene glycol and glycerol (1:1 v/v) as solvents, catalyzed by sulfuric acid. The tested parameters were as follows: particle size >0.420– 0.177mm, temperature 140–200°C, and reaction time between 15 and 60min. The initial dried material, the liquefied material, and the resulting solid residue were analyzed by FTIRATR for polyol characterization. The results showed that WS are mostly composed of lignin with 35.0% and polysaccharides, 30.0% cellulose and 24.9% hemicelluloses. High-lignin content indicated that WS might be used as a bio-fuel or adhesives. Extractives represent 10.2% with almost half (4.6%) of polar extractives. The best conditions to attain the optimal liquefaction yield were 160°C, 30min, and 0.420–0.250mm particle size, for the tested parameters. FTIR spectrum of the liquefied material is very different from the original material, and solid residue spectra seem to indicate that there is higher liquefaction of polysaccharides when compared with lignin since there is a higher absorption at 1,600 cm−1 and lower absorption at 1,040 cm−1 and that liquefied compounds are probably in smaller molecules. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ipv.pt/bitstreams/e970b510-a421-47dd-9dfa-3cd5b1f929b4/download |
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| identifier.url.fl_str_mv | http://hdl.handle.net/10400.19/7496 |
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| institution | Instituto Politécnico de Viseu |
| instname_str | Instituto Politécnico de Viseu |
| language | eng |
| network_acronym_str | ripv |
| network_name_str | Repositório Científico do Instituto Politécnico de Viseu |
| oai_identifier_str | oai:repositorio.ipv.pt:10400.19/7496 |
| organization_str_mv | urn:organizationAcronym:ripv |
| person_str_mv | Domingos, Idalina Domingos, Idalina https://www.ciencia-id.pt/7116-E1DE-88E7 7116-E1DE-88E7 http://orcid.org/0000-0002-4308-1563 0000-0002-4308-1563 Ferreira, José Ferreira, José https://www.ciencia-id.pt/B81E-BE45-E128 B81E-BE45-E128 http://orcid.org/0000-0001-7596-8065 0000-0001-7596-8065 Cruz-Lopes, Luísa Cruz-Lopes, Luísa https://www.ciencia-id.pt/7916-0833-5B38 7916-0833-5B38 http://orcid.org/0000-0001-6502-7202 0000-0001-6502-7202 Esteves, Bruno Esteves, Bruno https://www.ciencia-id.pt/521B-63A7-B248 521B-63A7-B248 http://orcid.org/0000-0001-6660-3128 0000-0001-6660-3128 |
| publishDate | 2022 |
| reponame_str | Repositório Científico do Instituto Politécnico de Viseu |
| repository_id_str | urn:repositoryAcronym:ripv |
| service_str_mv | urn:repositoryAcronym:ripv |
| spelling | engpt_PTThe cultivation of walnut (Juglans regia L.) for the exploitation of the fruit has been increasingly recognized worldwide; therefore, it is important to valorize a large amount of biomass from walnut shells (WS), where liquefaction may play an important role. This work intends to contribute to an improved understanding of the best uses for this material. The assays were made with a binary mixture of ethylene glycol and glycerol (1:1 v/v) as solvents, catalyzed by sulfuric acid. The tested parameters were as follows: particle size >0.420– 0.177mm, temperature 140–200°C, and reaction time between 15 and 60min. The initial dried material, the liquefied material, and the resulting solid residue were analyzed by FTIRATR for polyol characterization. The results showed that WS are mostly composed of lignin with 35.0% and polysaccharides, 30.0% cellulose and 24.9% hemicelluloses. High-lignin content indicated that WS might be used as a bio-fuel or adhesives. Extractives represent 10.2% with almost half (4.6%) of polar extractives. The best conditions to attain the optimal liquefaction yield were 160°C, 30min, and 0.420–0.250mm particle size, for the tested parameters. FTIR spectrum of the liquefied material is very different from the original material, and solid residue spectra seem to indicate that there is higher liquefaction of polysaccharides when compared with lignin since there is a higher absorption at 1,600 cm−1 and lower absorption at 1,040 cm−1 and that liquefied compounds are probably in smaller molecules.application/pdfpt_PTLiquefaction and chemical composition of walnut shellsPersonalDomingos, IdalinaDSpacehttp://dspace.org/items/50134ab7-55eb-4e8a-a5ea-5cc54b1468e3DSpacehttp://dspace.org/items/50134ab7-55eb-4e8a-a5ea-5cc54b1468e3DomingosidalinaCiência IDhttps://www.ciencia-id.pt7116-E1DE-88E7ORCIDhttp://orcid.org0000-0002-4308-1563Scopus Author IDhttps://www.scopus.com24281086400PersonalFerreira, JoséDSpacehttp://dspace.org/items/7d09c228-3415-4272-9299-89c6951565d7DSpacehttp://dspace.org/items/7d09c228-3415-4272-9299-89c6951565d7FerreiraJoséCiência IDhttps://www.ciencia-id.ptB81E-BE45-E128ORCIDhttp://orcid.org0000-0001-7596-8065Scopus Author IDhttps://www.scopus.com18133647300PersonalCruz-Lopes, LuísaDSpacehttp://dspace.org/items/fa1274f5-f7f8-4afd-8ed8-5f988d6c7226DSpacehttp://dspace.org/items/fa1274f5-f7f8-4afd-8ed8-5f988d6c7226Gonçalves Oliveira Valente da Cruz-LopesLuísa PaulaCiência IDhttps://www.ciencia-id.pt7916-0833-5B38ORCIDhttp://orcid.org0000-0001-6502-7202PersonalEsteves, BrunoDSpacehttp://dspace.org/items/a3351493-41e8-4758-acae-39e3382d0b04DSpacehttp://dspace.org/items/a3351493-41e8-4758-acae-39e3382d0b04EstevesBrunoCiência IDhttps://www.ciencia-id.pt521B-63A7-B248ORCIDhttp://orcid.org0000-0001-6660-3128Researcher IDhttps://www.researcherid.comC-2173-2012Researcher IDhttps://www.researcherid.comC-2173-2012Scopus Author IDhttps://www.scopus.com57202554441HostingInstitutionOrganizationalInstituto Politécnico de Viseue-mailmailto:repositorio@sc.ipv.ptrepositorio@sc.ipv.ptDOIIsPartOf10.1515/opag-2022-00722023-01-04T15:00:28Z20222022-01-01T00:00:00ZHandlehttp://hdl.handle.net/10400.19/7496http://purl.org/coar/access_right/c_abf2open accesswalnut shellschemical compositionpolyalcohol liquefactionbiomass1873146 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ipv.pt/bitstreams/e970b510-a421-47dd-9dfa-3cd5b1f929b4/downloadOpen Agriculture71249256 |
| spellingShingle | Liquefaction and chemical composition of walnut shells Domingos, Idalina walnut shells chemical composition polyalcohol liquefaction biomass |
| subject.fl_str_mv | walnut shells chemical composition polyalcohol liquefaction biomass |
| title | Liquefaction and chemical composition of walnut shells |
| title_full | Liquefaction and chemical composition of walnut shells |
| title_fullStr | Liquefaction and chemical composition of walnut shells |
| title_full_unstemmed | Liquefaction and chemical composition of walnut shells |
| title_short | Liquefaction and chemical composition of walnut shells |
| title_sort | Liquefaction and chemical composition of walnut shells |
| topic | walnut shells chemical composition polyalcohol liquefaction biomass |
| topic_facet | walnut shells chemical composition polyalcohol liquefaction biomass |
| url | http://hdl.handle.net/10400.19/7496 |
| visible | 1 |