Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2
Autor(a) principal: | |
---|---|
Data de Publicação: | 2023 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/28791 |
Resumo: | Waste generation and environmental pollution contention are challenges to modern society. Liquid effluents pollute water sources and gaseous can aggravate the greenhouse effect. Adsorption highlights among the technologies that can be employed to gases and liquid treatments. In addition, biomass wastes can be employed for that, contributing for reducing solid waste generation. This work aimed to use by-products of butiá processing for adsorbents production (biochars and activated carbons) by pyrolytic route for CO2 and phenol adsorption. Biochars were produced in a reactor at 700ºC, for 1 h, using fibers, endocarps, almonds and deoiled almonds. Activated carbons were produced from fibers, endocarps and deoiled butiá almond using design of experiments, assessing different zinc chloride (ZnCl2) ratios (0.5, 1.5 and 2.5) and temperatures (400, 550 e 700°C). Endocarps presented higher yield for solid fraction at biochar and activated carbons preparations, by the higher percentage of lignin. The use of ZnCl2 at activated carbon preparation resulted in surface area increases until 2062% and formation of a structure with higher micropore volume. The higher adsorption capacity for CO2 was obtained with the biochar produced with endocarps, that reached 66.43 mg g-¹ , more effective that the higher result obtained with activated carbons (66.00 mg g-¹ for fibers with 0.5 ZnCl2 ratio, at 400ºC). Results shown that for CO2 adsorption, during 5 cycles evaluated, the biochars obtained from butiá by-products were more effective than activated carbons. Phenol adsorption with biochars presented the best result for deoiled almonds (17.69 mg g-¹ ). For activated carbons, the best result was obtained with endocarps at 700ºC and ZnCl2 ratio of 0.5, that presented 40.38 mg g-¹ , increasing in 403.49% adsorption capacity compared to respective biochar. For phenol adsorption, modification with ZnCl2 presents improvements on process effectiveness. Using decision trees on the evaluation of results obtained at production of activated carbons has clarified the importance of micropore volume percentage e micropore volume for gaseous adsorption, while for liquid adsorption pointed relevance of micropore volume and pore diameter to the best results. |
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2023-04-24T12:50:37Z2023-04-24T12:50:37Z2023-03-09http://repositorio.ufsm.br/handle/1/28791Waste generation and environmental pollution contention are challenges to modern society. Liquid effluents pollute water sources and gaseous can aggravate the greenhouse effect. Adsorption highlights among the technologies that can be employed to gases and liquid treatments. In addition, biomass wastes can be employed for that, contributing for reducing solid waste generation. This work aimed to use by-products of butiá processing for adsorbents production (biochars and activated carbons) by pyrolytic route for CO2 and phenol adsorption. Biochars were produced in a reactor at 700ºC, for 1 h, using fibers, endocarps, almonds and deoiled almonds. Activated carbons were produced from fibers, endocarps and deoiled butiá almond using design of experiments, assessing different zinc chloride (ZnCl2) ratios (0.5, 1.5 and 2.5) and temperatures (400, 550 e 700°C). Endocarps presented higher yield for solid fraction at biochar and activated carbons preparations, by the higher percentage of lignin. The use of ZnCl2 at activated carbon preparation resulted in surface area increases until 2062% and formation of a structure with higher micropore volume. The higher adsorption capacity for CO2 was obtained with the biochar produced with endocarps, that reached 66.43 mg g-¹ , more effective that the higher result obtained with activated carbons (66.00 mg g-¹ for fibers with 0.5 ZnCl2 ratio, at 400ºC). Results shown that for CO2 adsorption, during 5 cycles evaluated, the biochars obtained from butiá by-products were more effective than activated carbons. Phenol adsorption with biochars presented the best result for deoiled almonds (17.69 mg g-¹ ). For activated carbons, the best result was obtained with endocarps at 700ºC and ZnCl2 ratio of 0.5, that presented 40.38 mg g-¹ , increasing in 403.49% adsorption capacity compared to respective biochar. For phenol adsorption, modification with ZnCl2 presents improvements on process effectiveness. Using decision trees on the evaluation of results obtained at production of activated carbons has clarified the importance of micropore volume percentage e micropore volume for gaseous adsorption, while for liquid adsorption pointed relevance of micropore volume and pore diameter to the best results.A geração de resíduos e a contenção da poluição ambiental são grandes desafios da sociedade moderna. Os efluentes líquidos poluem fontes de água e os gasosos podem agravar o efeito estufa. Dentre as tecnologias utilizadas para o tratamento de gases e líquidos, se destaca a adsorção, que pode ser realizada a partir de biomassas residuais, colaborando na redução da geração de resíduos sólidos. Neste sentido, este trabalho objetivou aproveitar subprodutos do processamento do butiá para a produção de adsorventes (biochars e carvões ativados) por rota pirolítica, para adsorção de CO2 e fenol. Os biochars foram produzidos em reator, a 700°C, com patamar de 1 h, empregando como precursores as fibras, caroços, amêndoas e amêndoas desengorduradas. Os carvões ativados foram produzidos a partir de fibras, endocarpos e amêndoas de butiá desengorduradas, seguindo um planejamento experimental, investigando como variáveis a razão de cloreto de zinco (ZnCl2) (0,5; 1,5 e 2,5) e a temperatura (400, 550 e 700°C). Os endocarpos de butiá geraram biochar e carvões ativados com maior rendimento de fração sólida, devido ao elevado teor de lignina presente no precursor. A produção de carvões ativados resultou no desenvolvimento de estrutura com alto teor de microporos e área superficial específica de 1.262,72 m² g-¹ , um aumento de 2.062% em relação ao biochar. A maior capacidade adsortiva para CO2 foi obtida com o biochar de endocarpos, com 66,43 mg g-¹ , sendo mais efetivo que o melhor resultado apontado dentre os carvões ativados (66,00 mg g-¹ ), que fora produzido de fibras de butiá, em 400°C e 0,5 de razão de ZnCl2. Os resultados apontaram que, na adsorção de CO2, durante os cinco ciclos avaliados, os biochars de subprodutos do processamento de butiá foram mais efetivos do que os carvões ativados. A adsorção de fenol com biochars apresentou melhor resultado para amostra de amêndoas desengorduradas (17,69 mg g-¹ ). Dentre os carvões ativados, o melhor resultado para adsorção de fenol foi obtido com endocarpos, em 700°C e com razão de cloreto de 0,5, que apontou 40,38 mg g-¹ , um aumento de 403,49% em relação ao respectivo biochar. Para a adsorção de fenol, a modificação com ZnCl2 apontou melhoras importantes na efetividade do processo. O uso de árvores de decisão na avaliação dos resultados da produção dos carvões ativados elucidou a importância do percentual de microporos e volume de microporos para a adsorção gasosa, enquanto na adsorção líquida apontou a significância do volume de microporos e diâmetro de poro para os melhores resultados.porUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia QuímicaUFSMBrasilEngenharia QuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessPiróliseAdsorçãoDióxido de carbonoFibrasEndocarposAmêndoasPyrolysisAdsorptionCarbon dioxideFibersEndocarpsAlmondsCNPQ::ENGENHARIAS::ENGENHARIA QUIMICADesenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2Development of carbonaceous materials from by-products from butiá (Butia Spp.) processing and application as phenol and CO2 adsorbentsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisDotto, Guilherme Luizhttp://lattes.cnpq.br/5412544199323879Godinho, MarceloFoletto, Edson LuizRosa, Gabriela Silveira daPinto, Luiz Antonio de AlmeidaDruzian, Susanne Pedrosohttp://lattes.cnpq.br/6592130971504394Nunes, Isaac dos Santos300600000006600600600600600600600600cb4c4429-649d-4998-a6b3-cfcf481ab6b91af3c234-0dde-4aed-8e0a-b2dfbbf3b1466272019b-bf91-4517-98af-1c39243359f07bce5717-e71a-4de9-92da-aa4ea5b07b3bd7ced58e-bcad-4bad-99e7-59c2efa575496943a8d3-f1ee-4b34-98bb-98fd0c10088348d229d9-91d0-4685-8c8a-38cf25e058b0reponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
dc.title.alternative.eng.fl_str_mv |
Development of carbonaceous materials from by-products from butiá (Butia Spp.) processing and application as phenol and CO2 adsorbents |
title |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
spellingShingle |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 Nunes, Isaac dos Santos Pirólise Adsorção Dióxido de carbono Fibras Endocarpos Amêndoas Pyrolysis Adsorption Carbon dioxide Fibers Endocarps Almonds CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
title_full |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
title_fullStr |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
title_full_unstemmed |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
title_sort |
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2 |
author |
Nunes, Isaac dos Santos |
author_facet |
Nunes, Isaac dos Santos |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Dotto, Guilherme Luiz |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5412544199323879 |
dc.contributor.advisor-co1.fl_str_mv |
Godinho, Marcelo |
dc.contributor.referee1.fl_str_mv |
Foletto, Edson Luiz |
dc.contributor.referee2.fl_str_mv |
Rosa, Gabriela Silveira da |
dc.contributor.referee3.fl_str_mv |
Pinto, Luiz Antonio de Almeida |
dc.contributor.referee4.fl_str_mv |
Druzian, Susanne Pedroso |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6592130971504394 |
dc.contributor.author.fl_str_mv |
Nunes, Isaac dos Santos |
contributor_str_mv |
Dotto, Guilherme Luiz Godinho, Marcelo Foletto, Edson Luiz Rosa, Gabriela Silveira da Pinto, Luiz Antonio de Almeida Druzian, Susanne Pedroso |
dc.subject.por.fl_str_mv |
Pirólise Adsorção Dióxido de carbono Fibras Endocarpos Amêndoas |
topic |
Pirólise Adsorção Dióxido de carbono Fibras Endocarpos Amêndoas Pyrolysis Adsorption Carbon dioxide Fibers Endocarps Almonds CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Pyrolysis Adsorption Carbon dioxide Fibers Endocarps Almonds |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Waste generation and environmental pollution contention are challenges to modern society. Liquid effluents pollute water sources and gaseous can aggravate the greenhouse effect. Adsorption highlights among the technologies that can be employed to gases and liquid treatments. In addition, biomass wastes can be employed for that, contributing for reducing solid waste generation. This work aimed to use by-products of butiá processing for adsorbents production (biochars and activated carbons) by pyrolytic route for CO2 and phenol adsorption. Biochars were produced in a reactor at 700ºC, for 1 h, using fibers, endocarps, almonds and deoiled almonds. Activated carbons were produced from fibers, endocarps and deoiled butiá almond using design of experiments, assessing different zinc chloride (ZnCl2) ratios (0.5, 1.5 and 2.5) and temperatures (400, 550 e 700°C). Endocarps presented higher yield for solid fraction at biochar and activated carbons preparations, by the higher percentage of lignin. The use of ZnCl2 at activated carbon preparation resulted in surface area increases until 2062% and formation of a structure with higher micropore volume. The higher adsorption capacity for CO2 was obtained with the biochar produced with endocarps, that reached 66.43 mg g-¹ , more effective that the higher result obtained with activated carbons (66.00 mg g-¹ for fibers with 0.5 ZnCl2 ratio, at 400ºC). Results shown that for CO2 adsorption, during 5 cycles evaluated, the biochars obtained from butiá by-products were more effective than activated carbons. Phenol adsorption with biochars presented the best result for deoiled almonds (17.69 mg g-¹ ). For activated carbons, the best result was obtained with endocarps at 700ºC and ZnCl2 ratio of 0.5, that presented 40.38 mg g-¹ , increasing in 403.49% adsorption capacity compared to respective biochar. For phenol adsorption, modification with ZnCl2 presents improvements on process effectiveness. Using decision trees on the evaluation of results obtained at production of activated carbons has clarified the importance of micropore volume percentage e micropore volume for gaseous adsorption, while for liquid adsorption pointed relevance of micropore volume and pore diameter to the best results. |
publishDate |
2023 |
dc.date.accessioned.fl_str_mv |
2023-04-24T12:50:37Z |
dc.date.available.fl_str_mv |
2023-04-24T12:50:37Z |
dc.date.issued.fl_str_mv |
2023-03-09 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
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dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/28791 |
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http://repositorio.ufsm.br/handle/1/28791 |
dc.language.iso.fl_str_mv |
por |
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por |
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300600000006 |
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600 600 600 600 600 600 600 600 |
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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.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Química |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Química |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
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