Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/30331 |
Resumo: | Graphene has received great attention due to its excellent properties. Commonly, its synthesis is carried out from graphite. However, because graphite is a non-renewable material, it is necessary to develop graphene synthesis routes from others precursors. In this sense, graphene-like materials have been synthesized/studied. Among the possible precursors, agricultural residues, called biomass, stand out, which are a great alternative for the synthesis of various materials. Between the biomasses, the grape bagasse stands out due to the large quantities which is generated, mainly by the activities of viticulture. The use of thermochemical conversion processes, such as pyrolysis, is one of the alternatives used in the recovery of these wastes, resulting in products with greater added value. In this work, six adsorbents materials were produced from grape bagasse through pyrolysis. Grape bagasse was initially characterized in order to verify its possible use in pyrolysis processes to obtain adsorbent materials. First, three chars (C700, C800 and C900) were produced at different pyrolysis temperatures (700, 800 and 900 ºC). These chars were characterized according to their chemical and textural properties, and, later used in the study of adsorption of copper ions (Cu(II)) from aqueous solutions. The chars showed different textural characteristics, but similar chemical surfaces and Cu(II) adsorption potential. The char produced at 700 ºC (C700) showed better performance in the adsorption study, with a maximum adsorption capacity of 42 mg g-1 . In a second step, three nanoadsorbents materials were produced at the same pyrolysis temperatures, called graphene-like porous carbon nanosheets (GPCN700, GPCN800 and GPCN900). These nanoadsorbents were characterized and their results were compared to the chars. The six materials (chars and nanoadsorbents) were used in the adsorption of carbon dioxide gas (CO2(g)). The GPCNs presented specific surface areas notably larger than the chars, and the GPCN900 presented the largest area found (1062.696 m2 g -1 ). While the chars were classified as mesoporous, the GPCNs showed micropores, which resulted in higher CO2(g) adsorption capacities (168.71 mg CO2(g) g -1 ). |
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Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorçãoSynthesis of nanoadsorbents and chars through pyrolysis of grape bagasse for adsorption processGrafenoBagaço de uvaPiróliseAdsorçãoÍons cobreDióxido de carbonoCharsGrapheneGrape bagassePyrolysisAdsorptionCopper ionsCarbon dioxideCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAGraphene has received great attention due to its excellent properties. Commonly, its synthesis is carried out from graphite. However, because graphite is a non-renewable material, it is necessary to develop graphene synthesis routes from others precursors. In this sense, graphene-like materials have been synthesized/studied. Among the possible precursors, agricultural residues, called biomass, stand out, which are a great alternative for the synthesis of various materials. Between the biomasses, the grape bagasse stands out due to the large quantities which is generated, mainly by the activities of viticulture. The use of thermochemical conversion processes, such as pyrolysis, is one of the alternatives used in the recovery of these wastes, resulting in products with greater added value. In this work, six adsorbents materials were produced from grape bagasse through pyrolysis. Grape bagasse was initially characterized in order to verify its possible use in pyrolysis processes to obtain adsorbent materials. First, three chars (C700, C800 and C900) were produced at different pyrolysis temperatures (700, 800 and 900 ºC). These chars were characterized according to their chemical and textural properties, and, later used in the study of adsorption of copper ions (Cu(II)) from aqueous solutions. The chars showed different textural characteristics, but similar chemical surfaces and Cu(II) adsorption potential. The char produced at 700 ºC (C700) showed better performance in the adsorption study, with a maximum adsorption capacity of 42 mg g-1 . In a second step, three nanoadsorbents materials were produced at the same pyrolysis temperatures, called graphene-like porous carbon nanosheets (GPCN700, GPCN800 and GPCN900). These nanoadsorbents were characterized and their results were compared to the chars. The six materials (chars and nanoadsorbents) were used in the adsorption of carbon dioxide gas (CO2(g)). The GPCNs presented specific surface areas notably larger than the chars, and the GPCN900 presented the largest area found (1062.696 m2 g -1 ). While the chars were classified as mesoporous, the GPCNs showed micropores, which resulted in higher CO2(g) adsorption capacities (168.71 mg CO2(g) g -1 ).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESO grafeno têm recebido grande destaque devido às suas excelentes propriedades. Comumente, sua síntese é realizada a partir do grafite. Contudo, pelo fato do grafite ser um material não renovável, faz-se necessário o desenvolvimentos de rotas de síntese de grafeno a partir de outros precursores. Neste sentido, materiais semelhantes ao grafeno (graphene-like) vêm sendo sintetizados/estudados. Dentre os possíveis precursores, destacam-se os resíduos agrícolas, denominados biomassa, os quais são uma ótima alternativa para a síntese de diversos materiais. Dentre as biomassas, o bagaço de uva destaca-se devido às largas quantidades em que é gerado, principalmente pelas atividades de vitivinicultura. A utilização de processos de conversão termoquímica, como a pirólise, é uma das alternativas utilizadas na valorização destes resíduos, resultando em produtos de maior valor agregado. Neste trabalho, foram produzidos seis materiais adsorventes a partir da pirólise de bagaço de uva. O bagaço de uva foi inicialmente caracterizado com a finalidade de verificar sua possível utilização em processos de pirólise para obtenção de materiais adsorventes. Primeiramente, foram produzidos três chars (C700, C800 e C900) em diferentes temperaturas de pirólise (700, 800 e 900 ºC). Esses chars foram caracterizados de acordo com suas propriedades químicas e texturais, e posteriormente utilizados no estudo de adsorção de íons cobre (Cu(II)) de soluções aquosas. Os chars apresentaram diferentes características texturais, porém superfícies químicas e potencial de adsorção de Cu(II) semelhantes. O char produzido a 700 ºC (C700) apresentou melhor desempenho no estudo de adsorção, com capacidade máxima de adsoção de 42 mg g-1 . Em uma segunda etapa, foram produzidos três materiais nanoadsorventes nas mesmas temperaturas de pirólise, denominados graphene-like porous carbon nanosheets (GPCN700, GPCN800 e GPCN900). Estes nanoadsorventes foram caracterizados e tiveram seus resultados comparados aos chars. Os seis materiais (chars e nanoadsorventes) foram utilizados na adsorção de gás dióxido de carbono (CO2(g)). Os GPCNs apresentaram áreas superficais específicas notavelmente maiores que os chars, sendo que o GPCN900 apresentou a maior área encontrada (1062,696 m2 g -1 ). Enquanto que os chars foram classificados como mesoporosos, os GPCNs apresentaram microporos, o que resultou em maiores capacidades de adsoção de CO2(g) (168,71 mg CO2(g) g -1 ).Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e ExatasDotto, Guilherme Luizhttp://lattes.cnpq.br/5412544199323879Perondi, DanieleCollazzo , Gabriela CarvalhoPiccin , Jeferson SteffanelloSilva, Caroline Machado Sebem da2023-10-11T13:07:47Z2023-10-11T13:07:47Z2022-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/30331porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2023-10-11T13:07:47Zoai:repositorio.ufsm.br:1/30331Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2023-10-11T13:07:47Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção Synthesis of nanoadsorbents and chars through pyrolysis of grape bagasse for adsorption process |
title |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
spellingShingle |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção Silva, Caroline Machado Sebem da Grafeno Bagaço de uva Pirólise Adsorção Íons cobre Dióxido de carbono Chars Graphene Grape bagasse Pyrolysis Adsorption Copper ions Carbon dioxide CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
title_full |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
title_fullStr |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
title_full_unstemmed |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
title_sort |
Síntese de nanoadsorventes e chars a partir da pirólise de bagaço de uva para fins de adsorção |
author |
Silva, Caroline Machado Sebem da |
author_facet |
Silva, Caroline Machado Sebem da |
author_role |
author |
dc.contributor.none.fl_str_mv |
Dotto, Guilherme Luiz http://lattes.cnpq.br/5412544199323879 Perondi, Daniele Collazzo , Gabriela Carvalho Piccin , Jeferson Steffanello |
dc.contributor.author.fl_str_mv |
Silva, Caroline Machado Sebem da |
dc.subject.por.fl_str_mv |
Grafeno Bagaço de uva Pirólise Adsorção Íons cobre Dióxido de carbono Chars Graphene Grape bagasse Pyrolysis Adsorption Copper ions Carbon dioxide CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
topic |
Grafeno Bagaço de uva Pirólise Adsorção Íons cobre Dióxido de carbono Chars Graphene Grape bagasse Pyrolysis Adsorption Copper ions Carbon dioxide CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
Graphene has received great attention due to its excellent properties. Commonly, its synthesis is carried out from graphite. However, because graphite is a non-renewable material, it is necessary to develop graphene synthesis routes from others precursors. In this sense, graphene-like materials have been synthesized/studied. Among the possible precursors, agricultural residues, called biomass, stand out, which are a great alternative for the synthesis of various materials. Between the biomasses, the grape bagasse stands out due to the large quantities which is generated, mainly by the activities of viticulture. The use of thermochemical conversion processes, such as pyrolysis, is one of the alternatives used in the recovery of these wastes, resulting in products with greater added value. In this work, six adsorbents materials were produced from grape bagasse through pyrolysis. Grape bagasse was initially characterized in order to verify its possible use in pyrolysis processes to obtain adsorbent materials. First, three chars (C700, C800 and C900) were produced at different pyrolysis temperatures (700, 800 and 900 ºC). These chars were characterized according to their chemical and textural properties, and, later used in the study of adsorption of copper ions (Cu(II)) from aqueous solutions. The chars showed different textural characteristics, but similar chemical surfaces and Cu(II) adsorption potential. The char produced at 700 ºC (C700) showed better performance in the adsorption study, with a maximum adsorption capacity of 42 mg g-1 . In a second step, three nanoadsorbents materials were produced at the same pyrolysis temperatures, called graphene-like porous carbon nanosheets (GPCN700, GPCN800 and GPCN900). These nanoadsorbents were characterized and their results were compared to the chars. The six materials (chars and nanoadsorbents) were used in the adsorption of carbon dioxide gas (CO2(g)). The GPCNs presented specific surface areas notably larger than the chars, and the GPCN900 presented the largest area found (1062.696 m2 g -1 ). While the chars were classified as mesoporous, the GPCNs showed micropores, which resulted in higher CO2(g) adsorption capacities (168.71 mg CO2(g) g -1 ). |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-10-01 2023-10-11T13:07:47Z 2023-10-11T13:07:47Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/30331 |
url |
http://repositorio.ufsm.br/handle/1/30331 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Química UFSM Programa de Pós-Graduação em Química Centro de Ciências Naturais e Exatas |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Química UFSM Programa de Pós-Graduação em Química Centro de Ciências Naturais e Exatas |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
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1805922079377195008 |