Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C
Characteristics of the endocarp of Acrocomia aculeata fruit samples were evaluated before and after 2 h of iso thermal pyrolysis in the range 250–550 °C. Differential thermogravimetric (DTG) curves from the char, obtained at 300 °C, confirm that degradation of hemicellulose and cellulose was complet...
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| Format: | article |
| Langue: | anglais |
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2017
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| Accès en ligne: | http://hdl.handle.net/20.500.14066/3570 |
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| _version_ | 1870885383332429824 |
|---|---|
| author | Duarte Chávez, Shirley Johanna Magalí |
| author2 | Almeida, Giana Rolón, Juan Carlos |
| author2_role | author author |
| author_browse | Almeida, Giana Duarte Chávez, Shirley Johanna Magalí Rolón, Juan Carlos |
| author_facet | Duarte Chávez, Shirley Johanna Magalí Almeida, Giana Rolón, Juan Carlos |
| author_role | author |
| bitstream.checksum.fl_str_mv | 9b308afa8261e8dbd872ffa47070b508 858b22fda432bd774e469302988c1974 b72c2804aa3675f337b844524b693462 |
| bitstream.checksumAlgorithm.fl_str_mv | MD5 MD5 MD5 |
| bitstream.url.fl_str_mv | http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/1/14-INV-087art.pdf http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/2/license.txt http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/3/14-INV-087art.pdf.txt |
| dc.contributor.other.es.fl_str_mv | Universidad Nacional de Asunción - Facultad de Ciencias Químicas Universidad Nacional de Asunción - Facultad de Ingeniería |
| dc.creator.none.fl_str_mv | Duarte Chávez, Shirley Johanna Magalí Almeida, Giana Rolón, Juan Carlos |
| dc.date.accessioned.none.fl_str_mv | 2022-04-25T12:46:59Z |
| dc.date.available.none.fl_str_mv | 2022-04-25T12:46:59Z |
| dc.date.issued.none.fl_str_mv | 2017 |
| dc.identifier.uri.none.fl_str_mv | http://hdl.handle.net/20.500.14066/3570 |
| dc.language.iso.es.fl_str_mv | eng |
| dc.relation.projectCONACYT.es.fl_str_mv | 14-INV-087 |
| dc.rights.accessRights.es.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.subject.classification.es.fl_str_mv | 6. Producción y tecnología industrial |
| dc.subject.other.es.fl_str_mv | SURFACE AREA ELEMENTAL ANALYSIS DYNAMIC VAPOR SORPTION COCONUT ENDOCARP PYROLYSIS MECHANISM |
| dc.title.es.fl_str_mv | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| dc.type.es.fl_str_mv | info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| description | Characteristics of the endocarp of Acrocomia aculeata fruit samples were evaluated before and after 2 h of iso thermal pyrolysis in the range 250–550 °C. Differential thermogravimetric (DTG) curves from the char, obtained at 300 °C, confirm that degradation of hemicellulose and cellulose was complete and resulted in approximately 42.5% oxygen loss. The micrographs obtained from scanning electron microscopy with a field emission gun (SEM/FEG) confirmed a softened phase from the chars treated at 250 °C. The van Krevelen analysis shows that energy intensification of the sample transferred from peat to charcoal as the treatment intensity increased; this resulted in a 71% mass loss at 550 °C. The surface area of the treated sample increased exponentially with a factor of 1.2 per percentage of mass loss, from 450 °C and reached 216 m2 /g at 550 °C as a consequence of the development of microporous structures. The water-vapor-sorption properties were strongly affected by the treatment, with a pronounced type V isotherm curve for the char at 550 °C. These results show the evolution in chemical and structural properties of coconut endocarp during its isothermal pyrolysis. In particular, the im proved char properties indicate that this material may be used as solid fuel or as raw material for the gasification process. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | CONACYT_27a7795e49c2d0d918de624b412b83f8 |
| language | eng |
| network_acronym_str | CONACYT |
| network_name_str | Repositorio Institucional CONACYT |
| oai_identifier_str | oai:repositorio.conacyt.gov.py:20.500.14066/3570 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| repository.mail.fl_str_mv | repositorio.institucional@conacyt.gov.py |
| repository.name.fl_str_mv | Repositorio Institucional CONACYT |
| repository_id_str | |
| spelling | 365600474e4101-dfa1-4abc-ad37-92cd7110bbaa6001005600Universidad Nacional de Asunción - Facultad de Ciencias QuímicasUniversidad Nacional de Asunción - Facultad de Ingeniería2022-04-25T12:46:59Z2022-04-25T12:46:59Z2017http://hdl.handle.net/20.500.14066/3570Characteristics of the endocarp of Acrocomia aculeata fruit samples were evaluated before and after 2 h of iso thermal pyrolysis in the range 250–550 °C. Differential thermogravimetric (DTG) curves from the char, obtained at 300 °C, confirm that degradation of hemicellulose and cellulose was complete and resulted in approximately 42.5% oxygen loss. The micrographs obtained from scanning electron microscopy with a field emission gun (SEM/FEG) confirmed a softened phase from the chars treated at 250 °C. The van Krevelen analysis shows that energy intensification of the sample transferred from peat to charcoal as the treatment intensity increased; this resulted in a 71% mass loss at 550 °C. The surface area of the treated sample increased exponentially with a factor of 1.2 per percentage of mass loss, from 450 °C and reached 216 m2 /g at 550 °C as a consequence of the development of microporous structures. The water-vapor-sorption properties were strongly affected by the treatment, with a pronounced type V isotherm curve for the char at 550 °C. These results show the evolution in chemical and structural properties of coconut endocarp during its isothermal pyrolysis. In particular, the im proved char properties indicate that this material may be used as solid fuel or as raw material for the gasification process.Consejo Nacional de Ciencia y TecnologíaPROCIENCIAeng6. Producción y tecnología industrialSURFACE AREAELEMENTAL ANALYSISDYNAMIC VAPOR SORPTIONCOCONUT ENDOCARPPYROLYSIS MECHANISMAlteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °Cinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion126Journal of Analytical and Applied Pyrolysis889814-INV-087info:eu-repo/semantics/openAccessDuarte Chávez, Shirley Johanna MagalíAlmeida, GianaRolón, Juan CarlosORIGINAL14-INV-087art.pdf14-INV-087art.pdf14-INV-087artapplication/pdf5719065http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/1/14-INV-087art.pdf9b308afa8261e8dbd872ffa47070b508MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81698http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/2/license.txt858b22fda432bd774e469302988c1974MD52TEXT14-INV-087art.pdf.txt14-INV-087art.pdf.txtExtracted texttext/plain51477http://repositorio.conacyt.gov.py/bitstream/20.500.14066/3570/3/14-INV-087art.pdf.txtb72c2804aa3675f337b844524b693462MD5320.500.14066/3570oai:repositorio.conacyt.gov.py:20.500.14066/35702026-02-12 19:30:28.503Repositorio Institucional CONACYTrepositorio.institucional@conacyt.gov.pyQWwgYWNlcHRhciBlc3RhIGxpY2VuY2lhLCB1c3RlZCBjb21vIGF1dG9yIHkgcHJvcGlldGFyaW8gZGUgbG9zIGRlcmVjaG9zIGRlIHByb3BpZWRhZCBpbnRlbGVjdHVhbCBkZSBzdSBvYnJhIG90b3JnYSBhbCBSZXBvc2l0b3JpbyBJbnN0aXR1Y2lvbmFsIENPTkFDWVQgZWwgZGVyZWNobyBubyBleGNsdXNpdm8gZGUgcmVwcm9kdWNjacOzbiB5IGRpc3RyaWJ1Y2nDs24gZGUgc3Ugb2JyYSBlbiBjdWFscXVpZXIgZm9ybWF0byB5IG1lZGlvLgoKQWNlcHRhIHF1ZSwgc2luIG1vZGlmaWNhciBlbCBjb250ZW5pZG8sIHNlIHB1ZWRhIGNvbnZlcnRpciBzdSBvYnJhIGEgb3RybyBmb3JtYXRvIGNvbiBmaW5lcyBkZSBwcmVzZXJ2YWNpw7NuLiBBc8OtIG1pc21vLCBhY2VwdGEgcXVlIHNlIHB1ZWRhIGNvbnNlcnZhciBtw6FzIGRlIHVuYSBjb3BpYSBwb3IgbW90aXZvcyBkZSBzZWd1cmlkYWQgeSBwcmVzZXJ2YWNpw7NuLgoKVXN0ZWQgZGVjbGFyYSBxdWUgZWwgdHJhYmFqbyBwcmVzZW50YWRvIGVzIG9yaWdpbmFsIHkgcXVlIGN1ZW50YSBjb24gbGEgcG90ZXN0YWQgcGFyYSBvdG9yZ2FyIGxvcyBkZXJlY2hvcyBkZXRhbGxhZG9zIGVuIGVzdGEgbGljZW5jaWEuIFRhbWJpw6luIGRlY2xhcmEgcXVlIHN1IG9icmEgbm8gaW5mcmluZ2UgbG8gZXN0YWJsZWNpZG8gZW4gbGEgdmlnZW50ZSBsZWdpc2xhY2nDs24gc29icmUgcHJvcGllZGFkIGludGVsZWN0dWFsLgoKU2kgbGEgb2JyYSBjb250aWVuZSBtYXRlcmlhbCBwYXJhIGVsIGN1YWwgbm8gdGllbmUgZGVyZWNob3MgZGUgYXV0b3IsIHVzdGVkIGRlY2xhcmEgcXVlIGhhIG9idGVuaWRvIGxvcyBwZXJtaXNvcyBuZWNlc2FyaW9zIGRlbCBwcm9waWV0YXJpbyBwYXJhIG90b3JnYXIgYWwgUmVwb3NpdG9yaW8gSW5zdGl0dWNpb25hbCBDT05BQ1lUIGxvcyBkZXJlY2hvcyByZXF1ZXJpZG9zIHBvciBlc3RhIGxpY2VuY2lhLCB5IHF1ZSBkaWNobyBtYXRlcmlhbCBkZSBwcm9waWVkYWQgZGUgdGVyY2Vyb3MgZXN0w6EgY2xhcmFtZW50ZSBpZGVudGlmaWNhZG8geSByZWNvbm9jaWRvIGRlbnRybyBkZWwgY29udGVuaWRvIGRlIGxhIG9icmEuCgpTaSBsYSBvYnJhIHF1ZSBkZXBvc2l0YSBoYSBzaWRvIHBhdHJvY2luYWRhIG8gZmluYW5jaWFkYSBwb3IgdW5hIG9yZ2FuaXphY2nDs24sIHVzdGVkIGRlY2xhcmEgcXVlIGhhIGN1bXBsaWRvIGNvbiBsYXMgb2JsaWdhY2lvbmVzIHJlcXVlcmlkYXMgcG9yIHRhbCBhY3VlcmRvLgoKU2kgZWwgZG9jdW1lbnRvIHNlIGJhc2EgZW4gdW5hIG9icmEgcXVlIGhhIHNpZG8gcGF0cm9jaW5hZGEgbyBhcG95YWRhIHBvciB1bmEgYWdlbmNpYSB1IG9yZ2FuaXphY2nDs24sIHNlIHByZXN1cG9uZSBxdWUgc2UgaGEgY3VtcGxpZG8gY29uIGN1YWxxdWllciBkZXJlY2hvIGRlIHJldmlzacOzbiB1IG90cmFzIG9ibGlnYWNpb25lcyByZXF1ZXJpZGFzIHBvciBlc3RlIGNvbnRyYXRvIG8gYWN1ZXJkby4KCkVsIFJlcG9zaXRvcmlvIEluc3RpdHVjaW9uYWwgQ09OQUNZVCBpZGVudGlmaWNhcsOhIGNsYXJhbWVudGUgc3UvcyBub21icmUvcyBjb21vIGVsL2xvcyBhdXRvci9lcyBvIHByb3BpZXRhcmlvL3MgZGUgbG9zIGRlcmVjaG9zIGRlbCBkb2N1bWVudG8sIHkgbm8gaGFyw6EgbmluZ3VuYSBhbHRlcmFjacOzbiBkZSBzdSBkb2N1bWVudG8gZGlmZXJlbnRlIGEgbGFzIHBlcm1pdGlkYXMgZW4gZXN0YSBsaWNlbmNpYS4K |
| spellingShingle | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C Duarte Chávez, Shirley Johanna Magalí 6. Producción y tecnología industrial SURFACE AREA ELEMENTAL ANALYSIS DYNAMIC VAPOR SORPTION COCONUT ENDOCARP PYROLYSIS MECHANISM |
| status_str | publishedVersion |
| title | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| title_full | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| title_fullStr | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| title_full_unstemmed | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| title_short | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| title_sort | Alteration of physico-chemical characteristics of coconut endocarp — Acrocomia aculeata — by isothermal pyrolysis in the range 250–550 °C |
| topic | 6. Producción y tecnología industrial SURFACE AREA ELEMENTAL ANALYSIS DYNAMIC VAPOR SORPTION COCONUT ENDOCARP PYROLYSIS MECHANISM |
| url | http://hdl.handle.net/20.500.14066/3570 |