Estudo da compressibilidade de tortas de filtração de gases em filtros de tecido

Detalhes bibliográficos
Autor(a) principal: Fargnoli, Amélia Giovana
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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spelling 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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language por
dc.relation.confidence.fl_str_mv -1
-1
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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publisher.none.fl_str_mv Universidade Federal de São Carlos
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