Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas
Ano de defesa: | 2020 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
Centro de Tecnologia |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Química
|
Departamento: |
Engenharia Química
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/23218 |
Resumo: | In the present work, the use of subcritical conditions in the nickel adsorption process on activated carbon in a fixed bed was investigated in the aqueous medium, with variation of the values for different pressure (from 5 to 25 MPa) and temperature (from 100 to 200 °C) conditions. The evaluation of the effects of these variables on the adsorption operation was carried out through an experimental design for the stoichiometric adsorption capacity. The activated carbon was pre-treated with ultrasound followed by a basic attack with sodium hydroxide and characterized in order to observe changes on the activated carbon before treatment, after treatment, after adsorption and after desorption using X-ray diffraction techniques (XRD), infrared spectroscopy (FTIR) and surface area (BET). The mathematical models in the literature of Thomas, Yoon-Nelson, BDST, Dose-response and Parallel Sigmoidal were analyzed for the description of the rupture curve in the subcritical conditions, the most suitable model for the description of the curves under these conditions was found. Characterization in general showed an increase in the specific area as well as in the surface area due to the pre-treatment on the adsorbent and no significant damage to the structure of the coal throughout the process was observed. An evaluation of the results obtained for the adsorption, in comparison with the process under normal conditions, showed that the performance was greatly increased when used in subcritical conditions, mainly at 25 MPa and 200 °C. The values for the normal condition and the condition of 25 MPa and 200 °C were 1.54 and 6.30 mg g-¹, respectively for the stoichiometric adsorption capacity (Qeq), 5 and 166 min for the rupture time (tr) and 28.31 and 18.71 cm for the mass transfer zone (ZTM). As for the mathematical models, all the proposed models adjusted in general well to the experimental points (R²≥0.957) obtaining the best fit for the Dose-response model (AIC≤-67.28) to describe the curve of rupture in subcritical conditions. |
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2021-12-10T11:34:21Z2021-12-10T11:34:21Z2020-02-27http://repositorio.ufsm.br/handle/1/23218In the present work, the use of subcritical conditions in the nickel adsorption process on activated carbon in a fixed bed was investigated in the aqueous medium, with variation of the values for different pressure (from 5 to 25 MPa) and temperature (from 100 to 200 °C) conditions. The evaluation of the effects of these variables on the adsorption operation was carried out through an experimental design for the stoichiometric adsorption capacity. The activated carbon was pre-treated with ultrasound followed by a basic attack with sodium hydroxide and characterized in order to observe changes on the activated carbon before treatment, after treatment, after adsorption and after desorption using X-ray diffraction techniques (XRD), infrared spectroscopy (FTIR) and surface area (BET). The mathematical models in the literature of Thomas, Yoon-Nelson, BDST, Dose-response and Parallel Sigmoidal were analyzed for the description of the rupture curve in the subcritical conditions, the most suitable model for the description of the curves under these conditions was found. Characterization in general showed an increase in the specific area as well as in the surface area due to the pre-treatment on the adsorbent and no significant damage to the structure of the coal throughout the process was observed. An evaluation of the results obtained for the adsorption, in comparison with the process under normal conditions, showed that the performance was greatly increased when used in subcritical conditions, mainly at 25 MPa and 200 °C. The values for the normal condition and the condition of 25 MPa and 200 °C were 1.54 and 6.30 mg g-¹, respectively for the stoichiometric adsorption capacity (Qeq), 5 and 166 min for the rupture time (tr) and 28.31 and 18.71 cm for the mass transfer zone (ZTM). As for the mathematical models, all the proposed models adjusted in general well to the experimental points (R²≥0.957) obtaining the best fit for the Dose-response model (AIC≤-67.28) to describe the curve of rupture in subcritical conditions.No presente trabalho foi investigado o uso de condições subcríticas no processo de adsorção de níquel em carvão ativado em leito fixo no meio aquoso, variando os valores para diferentes condições de pressão (de 5 a 25 MPa) e temperatura (de 100 a 200 °C). A avaliação dos efeitos destas variáveis na operação de adsorção foi realizada através de um planejamento experimental para a capacidade da adsorção estequiométrica. O carvão foi pré- tratado com ultrassom seguido de ataque básico com hidróxido de sódio e caracterizado para observar mudanças sob o carvão ativado antes do tratamento, após o tratamento, após a adsorção e após dessorção através das técnicas de difração de raios-X (DRX), espectroscopia por infravermelho (FTIR) e área superficial (BET). Foi analisada para a descrição da curva de ruptura nas condições subcríticas os modelos matemáticos da literatura de Thomas, Yoon-Nelson, BDST, Dose-response e Parallel Sigmoidal e encontrado o modelo mais adequado para a descrição das curvas sobre estas condições. Pela caracterização verificou-se um aumente na área específica assim como na área superficial devido ao pré-tratamento sobre o adsorvente e não se observou danos expressivos a estrutura do carvão ao longo do processo. Avaliando os resultados obtidos para a adsorção e comparando com o processo em condições normais o desempenho foi bastante incrementado quando utilizadas nas condições subcríticas, principalmente a 25 MPa e 200 °C. Os valores para a condição normal e a condição de 25 MPa e 200 °C foram, respectivamente de 1,54 e 6,30 mg g–¹ para a capacidade de adsorção estequiométrica (Qeq), 5 e 166 min para o tempo de ruptura (tr) e 28,31 e 18,71 cm para a zona de transferência de massa (ZTM). Quanto aos modelos matemáticos todos os modelos propostos ajustaram-se no geral bem aos pontos experimentais com um (R²≥0,957) obtendo-se o melhor ajuste para descrever a curva de ruptura em condições subcríticas pelo modelo de Dose-Response (AIC≤-67,28).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade 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/openAccessAdsorçãoÁgua subcríticaCarvão ativadoLeito fixoModelos matemáticosNíquelPressãoTemperaturaAdsorptionSupercritical waterActivated carbonFixed bedMathematical modelNickelPressureTemperatureCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAAdsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticasNickel (II) adsorption using fixed bed with activated carbon in subcritical conditionsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisCastilhos, Fernanda dehttp://lattes.cnpq.br/4590978604104577Visioli, Luiz Jardelhttp://lattes.cnpq.br/8959430268531511Dotto, Guilherme LuizCadaval Junior, Tito Roberto Sant'Annahttp://lattes.cnpq.br/2823199333952173Reske, Gabriel Diogo300600000006600600600600600600340e815f-99e3-423d-b9d8-4333d082cb0f2650fa4d-b042-4b01-be22-a5be5ac8a8433e5ce09c-16d4-48ac-8266-177459026f17e0844fc7-d3e2-41b0-99b4-4470c9da324c5e4e0462-66a6-4d0c-bbdd-d70a23976a3areponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEQ_2020_RESKE_GABRIEL.pdfDIS_PPGEQ_2020_RESKE_GABRIEL.pdfDissertação de Mestradoapplication/pdf2392650http://repositorio.ufsm.br/bitstream/1/23218/1/DIS_PPGEQ_2020_RESKE_GABRIEL.pdf7feb03480facad4219aec5ce5e1f6e29MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/23218/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/23218/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53TEXTDIS_PPGEQ_2020_RESKE_GABRIEL.pdf.txtDIS_PPGEQ_2020_RESKE_GABRIEL.pdf.txtExtracted texttext/plain147293http://repositorio.ufsm.br/bitstream/1/23218/4/DIS_PPGEQ_2020_RESKE_GABRIEL.pdf.txt11d3f57e5dec547c8f4f91fd8274bd89MD54THUMBNAILDIS_PPGEQ_2020_RESKE_GABRIEL.pdf.jpgDIS_PPGEQ_2020_RESKE_GABRIEL.pdf.jpgIM Thumbnailimage/jpeg4509http://repositorio.ufsm.br/bitstream/1/23218/5/DIS_PPGEQ_2020_RESKE_GABRIEL.pdf.jpgf6fb89beed10b6139752f74d4ac0d2afMD551/232182021-12-11 03:02:00.055oai:repositorio.ufsm.br:1/23218Q3JlYXRpdmUgQ29tbW9ucw==Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132021-12-11T06:02Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
dc.title.alternative.eng.fl_str_mv |
Nickel (II) adsorption using fixed bed with activated carbon in subcritical conditions |
title |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
spellingShingle |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas Reske, Gabriel Diogo Adsorção Água subcrítica Carvão ativado Leito fixo Modelos matemáticos Níquel Pressão Temperatura Adsorption Supercritical water Activated carbon Fixed bed Mathematical model Nickel Pressure Temperature CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
title_full |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
title_fullStr |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
title_full_unstemmed |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
title_sort |
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas |
author |
Reske, Gabriel Diogo |
author_facet |
Reske, Gabriel Diogo |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Castilhos, Fernanda de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4590978604104577 |
dc.contributor.advisor-co1.fl_str_mv |
Visioli, Luiz Jardel |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/8959430268531511 |
dc.contributor.referee1.fl_str_mv |
Dotto, Guilherme Luiz |
dc.contributor.referee2.fl_str_mv |
Cadaval Junior, Tito Roberto Sant'Anna |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/2823199333952173 |
dc.contributor.author.fl_str_mv |
Reske, Gabriel Diogo |
contributor_str_mv |
Castilhos, Fernanda de Visioli, Luiz Jardel Dotto, Guilherme Luiz Cadaval Junior, Tito Roberto Sant'Anna |
dc.subject.por.fl_str_mv |
Adsorção Água subcrítica Carvão ativado Leito fixo Modelos matemáticos Níquel Pressão Temperatura |
topic |
Adsorção Água subcrítica Carvão ativado Leito fixo Modelos matemáticos Níquel Pressão Temperatura Adsorption Supercritical water Activated carbon Fixed bed Mathematical model Nickel Pressure Temperature CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Adsorption Supercritical water Activated carbon Fixed bed Mathematical model Nickel Pressure Temperature |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
In the present work, the use of subcritical conditions in the nickel adsorption process on activated carbon in a fixed bed was investigated in the aqueous medium, with variation of the values for different pressure (from 5 to 25 MPa) and temperature (from 100 to 200 °C) conditions. The evaluation of the effects of these variables on the adsorption operation was carried out through an experimental design for the stoichiometric adsorption capacity. The activated carbon was pre-treated with ultrasound followed by a basic attack with sodium hydroxide and characterized in order to observe changes on the activated carbon before treatment, after treatment, after adsorption and after desorption using X-ray diffraction techniques (XRD), infrared spectroscopy (FTIR) and surface area (BET). The mathematical models in the literature of Thomas, Yoon-Nelson, BDST, Dose-response and Parallel Sigmoidal were analyzed for the description of the rupture curve in the subcritical conditions, the most suitable model for the description of the curves under these conditions was found. Characterization in general showed an increase in the specific area as well as in the surface area due to the pre-treatment on the adsorbent and no significant damage to the structure of the coal throughout the process was observed. An evaluation of the results obtained for the adsorption, in comparison with the process under normal conditions, showed that the performance was greatly increased when used in subcritical conditions, mainly at 25 MPa and 200 °C. The values for the normal condition and the condition of 25 MPa and 200 °C were 1.54 and 6.30 mg g-¹, respectively for the stoichiometric adsorption capacity (Qeq), 5 and 166 min for the rupture time (tr) and 28.31 and 18.71 cm for the mass transfer zone (ZTM). As for the mathematical models, all the proposed models adjusted in general well to the experimental points (R²≥0.957) obtaining the best fit for the Dose-response model (AIC≤-67.28) to describe the curve of rupture in subcritical conditions. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-02-27 |
dc.date.accessioned.fl_str_mv |
2021-12-10T11:34:21Z |
dc.date.available.fl_str_mv |
2021-12-10T11:34:21Z |
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/1/23218 |
url |
http://repositorio.ufsm.br/handle/1/23218 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300600000006 |
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600 600 600 600 600 600 |
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340e815f-99e3-423d-b9d8-4333d082cb0f 2650fa4d-b042-4b01-be22-a5be5ac8a843 3e5ce09c-16d4-48ac-8266-177459026f17 e0844fc7-d3e2-41b0-99b4-4470c9da324c 5e4e0462-66a6-4d0c-bbdd-d70a23976a3a |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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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 |
dc.source.none.fl_str_mv |
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Manancial - Repositório Digital da UFSM |
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