Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/4072 |
Resumo: | A study on the compressibility of gas filtration cakes through their porosity investigation is presented in this work. The experimental unit consisted of a circular filter with a filtration area of 249 cm2 and a data acquisition system; mass flow rate and relative air humidity were controlled. The filter media used were a polyester felt (weighing 600 g/cm2) and an acrylic felt (weighing 550 g/cm2). A phosphate concentrate phosphate (ρp = 3.20 g/cm3 and dSt = 5.6 μm) and a magnesium silicate (talc) (ρp = 3.09 g/cm3 and dSt = 2.5 μm) were used as powder materials. Superficial filtration velocity was kept constant at 10 cm/s during phosphate concentrate filtration trials and five maximum pressure drops were set (100, 300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Superficial filtration velocity was kept constant at 10 cm/s during talc filtration trials and four maximum pressure drops were set (300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Trials at different filtration velocities (7.5 cm/s, 10 cm/s, 12.5 cm/s and 15.0 cm/s) were also performed. Initially, porosity data as a function of pressure drop per time were obtained. Each cake underwent a process to acquire the necessary resistance to be cut and embedded and then analyzed by a Scanning Electron Microscope. The obtained images were treated and analyzed in an image analyzing software which provided cakes porosity values. Afterwards, the influence of gas superficial velocity on average porosity was evaluated for cakes formed by talc powder. The porosity values obtained with the SEM images were compared to those obtained with equations found in the literature. A difference of 20 to 48% between experimental average porosity and estimated porosity was found for the phosphate concentrate cakes and of less than 13% for the talc cakes obtained at constant velocity. The average porosity values found for talc cakes were higher than those found for phosphate concentrate cakes, which was probably due to the fact that talc particles shape is extremely different from the spherical shape. A compressibility behavior for cakes of the two materials was possible to be observed. Talc cake porosity decreased with the increase of superficial filtration velocity. |
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Fargnoli, Amélia GiovanaAguiar, Mônica Lopeshttp://lattes.cnpq.br/0431688649128529http://lattes.cnpq.br/4923501286554930928bc4af-ff0a-41f2-8d8c-c2aae4d3ff612016-06-02T19:56:43Z2011-05-162016-06-02T19:56:43Z2010-03-31FARGNOLI, Amélia Giovana. Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido. 2010. 145 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2010.https://repositorio.ufscar.br/handle/ufscar/4072A study on the compressibility of gas filtration cakes through their porosity investigation is presented in this work. The experimental unit consisted of a circular filter with a filtration area of 249 cm2 and a data acquisition system; mass flow rate and relative air humidity were controlled. The filter media used were a polyester felt (weighing 600 g/cm2) and an acrylic felt (weighing 550 g/cm2). A phosphate concentrate phosphate (ρp = 3.20 g/cm3 and dSt = 5.6 μm) and a magnesium silicate (talc) (ρp = 3.09 g/cm3 and dSt = 2.5 μm) were used as powder materials. Superficial filtration velocity was kept constant at 10 cm/s during phosphate concentrate filtration trials and five maximum pressure drops were set (100, 300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Superficial filtration velocity was kept constant at 10 cm/s during talc filtration trials and four maximum pressure drops were set (300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Trials at different filtration velocities (7.5 cm/s, 10 cm/s, 12.5 cm/s and 15.0 cm/s) were also performed. Initially, porosity data as a function of pressure drop per time were obtained. Each cake underwent a process to acquire the necessary resistance to be cut and embedded and then analyzed by a Scanning Electron Microscope. The obtained images were treated and analyzed in an image analyzing software which provided cakes porosity values. Afterwards, the influence of gas superficial velocity on average porosity was evaluated for cakes formed by talc powder. The porosity values obtained with the SEM images were compared to those obtained with equations found in the literature. A difference of 20 to 48% between experimental average porosity and estimated porosity was found for the phosphate concentrate cakes and of less than 13% for the talc cakes obtained at constant velocity. The average porosity values found for talc cakes were higher than those found for phosphate concentrate cakes, which was probably due to the fact that talc particles shape is extremely different from the spherical shape. A compressibility behavior for cakes of the two materials was possible to be observed. Talc cake porosity decreased with the increase of superficial filtration velocity.Nesse trabalho apresenta-se um estudo da compressibilidade de tortas de filtração de gases através da investigação de sua porosidade. A unidade experimental consistiu de um filtro circular com área livre de filtração de 249 cm2, com vazão mássica e umidade relativa do ar controladas e um sistema de aquisição de dados. Os meios filtrantes utilizados foram um feltro de poliéster (gramatura 600 g/cm2) e um de acrílico (gramatura 550 g/cm2). Os materiais pulverulentos usados foram um concentrado fosfático (ρp = 3.20 g/cm3 e dSt = 5,6 μm) e um silicato de magnésio (talco) (ρp = 3,09 g/cm3 e dSt = 2,5 μm). Para os ensaios de filtração com a rocha fosfática foi fixada a velocidade superficial de filtração em 10 cm/s e cinco quedas de pressão máximas (100, 300, 600, 900 e 1200 mmH2O) à vazão mássica constante. Para os ensaios de filtração com o talco foi fixada a velocidade em 10 cm/s e quatro quedas de pressão máximas (300, 600, 900 e 1200 mmH2O) à vazão mássica constante. Também foram realizados ensaios para o talco a diferentes velocidades (7,5 cm/s, 10 cm/s, 12,5 cm/s e 15,0 cm/s). Inicialmente, obtiveram-se dados experimentais de porosidade em função da queda de pressão por tempo de filtração. Cada torta obtida passou por um tratamento para adquirir resistência necessária e ser analisada em um Microscópio Eletrônico de Varredura. As imagens obtidas foram tratadas e analisadas em um programa de análise de imagem fornecendo o valor da porosidade da torta. Posteriormente, analisou-se a influência da velocidade superficial de filtração na porosidade média de tortas de filtração formadas pelo talco. Compararam-se os valores de porosidade obtidos pelas imagens geradas no MEV com os obtidos por equações da literatura. Encontrou-se uma diferença de 20 a 48% entre os valores de porosidade média experimental e estimada para as tortas de rocha fosfática e de menos de 13% para o talco a velocidade constante. Os valores de porosidade média encontrados para o talco foram maiores que os encontrados para a rocha, provavelmente devido ao fato de que o formato das partículas de talco se distancia muito do formato esférico. Foi possível detectar um comportamento de compressibilidade para as tortas dos dois materiais. A porosidade das tortas de talco tendeu a diminuir com o aumento da velocidade superficial de filtração.Universidade Federal de Sao Carlosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Engenharia Química - PPGEQUFSCarBRFiltração de gasesPorosidadeFiltros de mangaCompressibilidadeVelocidade superficial de filtraçãoGas filtrationFabric filtersGas filtration cakesPorosityCompressibilitySuperficial filtration velocityENGENHARIAS::ENGENHARIA QUIMICAEstudo da compressibilidade de tortas de filtração de gases em filtros de tecidoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-1cfe199c5-37b6-4d5a-a38c-e0503b6b1995info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL3602.pdfapplication/pdf6626298https://repositorio.ufscar.br/bitstream/ufscar/4072/1/3602.pdf37082215cbad7185dd94995afede1d94MD51THUMBNAIL3602.pdf.jpg3602.pdf.jpgIM Thumbnailimage/jpeg6754https://repositorio.ufscar.br/bitstream/ufscar/4072/2/3602.pdf.jpgd48911b739d389ff0b6ce3165f27094fMD52ufscar/40722023-09-18 18:30:59.561oai:repositorio.ufscar.br:ufscar/4072Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:59Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
title |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
spellingShingle |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido Fargnoli, Amélia Giovana Filtração de gases Porosidade Filtros de manga Compressibilidade Velocidade superficial de filtração Gas filtration Fabric filters Gas filtration cakes Porosity Compressibility Superficial filtration velocity ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
title_full |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
title_fullStr |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
title_full_unstemmed |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
title_sort |
Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido |
author |
Fargnoli, Amélia Giovana |
author_facet |
Fargnoli, Amélia Giovana |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4923501286554930 |
dc.contributor.author.fl_str_mv |
Fargnoli, Amélia Giovana |
dc.contributor.advisor1.fl_str_mv |
Aguiar, Mônica Lopes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0431688649128529 |
dc.contributor.authorID.fl_str_mv |
928bc4af-ff0a-41f2-8d8c-c2aae4d3ff61 |
contributor_str_mv |
Aguiar, Mônica Lopes |
dc.subject.por.fl_str_mv |
Filtração de gases Porosidade Filtros de manga Compressibilidade Velocidade superficial de filtração |
topic |
Filtração de gases Porosidade Filtros de manga Compressibilidade Velocidade superficial de filtração Gas filtration Fabric filters Gas filtration cakes Porosity Compressibility Superficial filtration velocity ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Gas filtration Fabric filters Gas filtration cakes Porosity Compressibility Superficial filtration velocity |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA |
description |
A study on the compressibility of gas filtration cakes through their porosity investigation is presented in this work. The experimental unit consisted of a circular filter with a filtration area of 249 cm2 and a data acquisition system; mass flow rate and relative air humidity were controlled. The filter media used were a polyester felt (weighing 600 g/cm2) and an acrylic felt (weighing 550 g/cm2). A phosphate concentrate phosphate (ρp = 3.20 g/cm3 and dSt = 5.6 μm) and a magnesium silicate (talc) (ρp = 3.09 g/cm3 and dSt = 2.5 μm) were used as powder materials. Superficial filtration velocity was kept constant at 10 cm/s during phosphate concentrate filtration trials and five maximum pressure drops were set (100, 300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Superficial filtration velocity was kept constant at 10 cm/s during talc filtration trials and four maximum pressure drops were set (300, 600, 900 and 1200 mmH2O) at constant mass flow rate. Trials at different filtration velocities (7.5 cm/s, 10 cm/s, 12.5 cm/s and 15.0 cm/s) were also performed. Initially, porosity data as a function of pressure drop per time were obtained. Each cake underwent a process to acquire the necessary resistance to be cut and embedded and then analyzed by a Scanning Electron Microscope. The obtained images were treated and analyzed in an image analyzing software which provided cakes porosity values. Afterwards, the influence of gas superficial velocity on average porosity was evaluated for cakes formed by talc powder. The porosity values obtained with the SEM images were compared to those obtained with equations found in the literature. A difference of 20 to 48% between experimental average porosity and estimated porosity was found for the phosphate concentrate cakes and of less than 13% for the talc cakes obtained at constant velocity. The average porosity values found for talc cakes were higher than those found for phosphate concentrate cakes, which was probably due to the fact that talc particles shape is extremely different from the spherical shape. A compressibility behavior for cakes of the two materials was possible to be observed. Talc cake porosity decreased with the increase of superficial filtration velocity. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-03-31 |
dc.date.available.fl_str_mv |
2011-05-16 2016-06-02T19:56:43Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:56:43Z |
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.citation.fl_str_mv |
FARGNOLI, Amélia Giovana. Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido. 2010. 145 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2010. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/4072 |
identifier_str_mv |
FARGNOLI, Amélia Giovana. Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido. 2010. 145 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2010. |
url |
https://repositorio.ufscar.br/handle/ufscar/4072 |
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por |
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por |
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-1 -1 |
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cfe199c5-37b6-4d5a-a38c-e0503b6b1995 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Engenharia Química - PPGEQ |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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