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Activated carbon from leather shaving waste. Part I. Pyrolysis and physical activation / Patricia Poletto in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 9 (09/2016)
[article]
Titre : Activated carbon from leather shaving waste. Part I. Pyrolysis and physical activation Type de document : texte imprimé Auteurs : Patricia Poletto, Auteur ; Aline Dettmer, Auteur ; Vinicius Marcondes Bacca, Auteur ; Gabriela Carvalho Collazzo, Auteur ; Edson Luiz Foletto, Auteur ; Marcelo Godinho, Auteur Année de publication : 2016 Article en page(s) : p. 325-333 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Charbon actif
Cuirs et peaux -- Déchets -- Recyclage
Gaz
Huiles et graisses
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather industry plays an important role in the world economy. However, the waste generated by this industry can be an environmental problem. Pyrolysis can be an alternative for reusing this waste since it generates useful liquid, gas, and solid fractions. In the present study, leather shaving waste was converted into activated carbon through pyrolysis. The bio-oil produced consisted of over 75% of nitrogenated compounds and 10% of phenols. H2, CO, CH4 and CO2 were detected in the gas produced. The solid fraction (char - a carbonaceous material) was subjected to activation process for a porous structure development. Tests indicated that temperature (700°C and 900°C) had a significant effect on the burn-off and on the surface area. The high temperature tested (900°C) contributed to the development of the highest surface area (241.4 m2g-1) and the highest pore volume in the pore size region of 40 Å. Note de contenu : - MATERIALS AND METHODS : Leather shaving waste characterization - Pyrolysis process and characterization of the products - Production and characterization of activated carbon - Textural properties of activated carbon
- RESULTS AND DISCUSSION : Characterization of leather shaving waste - Pyrolysis process - Characterization of the pyrolysis products char (Oil characterization - Gas characterization) - Effect of physical activation - Textural propertiesEn ligne : https://drive.google.com/file/d/1TTcpzo5tpxpfg2QJmhVWRBfj3x66l_dz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26919
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Code-barres Cote Support Localisation Section Disponibilité 18288 - Périodique Bibliothèque principale Documentaires Disponible Activated carbon from leather shaving waste, Part II. Effect of char demineralization and activation time on surface area and pore size distribution / Christian Manera in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 11 (11/2016)
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Titre : Activated carbon from leather shaving waste, Part II. Effect of char demineralization and activation time on surface area and pore size distribution Type de document : texte imprimé Auteurs : Christian Manera, Auteur ; João Vitor Poli, Auteur ; Patricia Poletto, Auteur ; Suelem Daiane Ferreira, Auteur ; Aline Dettmer, Auteur ; Paulo Roberto Wander, Auteur ; Marcelo Godinho, Auteur Année de publication : 2016 Article en page(s) : p. 413-421 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Charbon actif
Cuirs et peaux -- Déchets -- Recyclage
Déminéralisation
Matériaux poreux -- Conception
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Taille des poresIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather shaving wastes generated by the leather industry can be used for microporous activated carbon production. In this work, chrome leather shaving wastes were pyrolyzed in a semi-continuous pilot screw reactor at 450°C. The char obtained was activated using carbon dioxide in a tubular reactor at 900°C. The effect of using nitrogen or carbon dioxide in the heating step of the activation process on the pore size distribution and cumulative pore volume was evaluated. Carbon dioxide reduced the pore volume in the mesopore region. Changing time in the carbon activation (4 and 6 h) was not significant on the surface area, increasing it from 757.9 m2g-1 to 927.4 m2g-1. However, the demineralization had a significant effect on the surface area, increasing it from 427.7 m2g-1 to 927.4 m2g-1 for 6 h of activation. The pore size distribution of non-demineralized activated carbon was very similar to the one of demineralized activated carbon, showing a cumulative pore volume mainly in the region of micropores. Note de contenu : - MATERIALS AND METHODS : Leather waste - Characterization methods - Pyrolysis process - Demineralization and physical activation of carbon
- RESULTS AND DISCUSSION : Proximate analysis of char - Effect of physical activation conditions on the activated carbon - Textural properties of the activated carbon - Morphological analysis - Chromium determination in samples of char and activated carbonEn ligne : https://drive.google.com/file/d/1XSMyTkI77gbR__trjgrPtSCKV1eFDC8h/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27158
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Code-barres Cote Support Localisation Section Disponibilité 18460 - Périodique Bibliothèque principale Documentaires Disponible Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
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Titre : Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; A. Crispim, Auteur ; A. Sampaio, Auteur ; E. Ramalho, Auteur ; F. Crispim, Auteur ; N. S. Caetano, Auteur ; P. C. Silva, Auteur Année de publication : 2013 Article en page(s) : p. 62-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Déchets -- Valorisation
Echarnage
Extraction (chimie)
Glutaraldéhyde
Huiles et graisses
Hydrolysats de protéines
Hydrolyse
Produits de nourriture du cuir
Protéines
SulfatesLe sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-.
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The present work had as its main objective creating added value by production of fat and hydrolyzed protein. To this end, fleshings were treated by hydrolysis with regard to the influence of various factors. The best result was found for a temperature of 60°C, 4 hours of hydrolysis, 2% of enzyme and 100% of water, with a fat extraction yield of 93%.
The fat obtained through the hydrolysis process was used to produce sulphated oils. The protein hydrolysate was concentrated to about 40% of solids content and used to prepare co-products of protein hydrolysage and glutaraldehyde.
Sulphated oils were applied in leather fatliquoring and the different protein hydrolysates were tested in leather retannage. The leather samples obtained were evaluated by physical-mechanical tests and the results were compared to those obtained through a standard process. the results were very satisfactory and, in some cases better than the specified standard.
The process of adding value to this waste results in a double advantage for the leather industry, reducing the environmental impact and allowing production of alternative products for leather fatliquoring and retannage.Note de contenu : - MATERIALS AND METHODS : Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation - Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation En ligne : https://drive.google.com/file/d/1L81N_8EBYtQFg4_VzHytHtl0U2zipgd1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18143
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Code-barres Cote Support Localisation Section Disponibilité 14986 - Périodique Bibliothèque principale Documentaires Disponible Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 3 (05-06/2013)
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Titre : Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; H. Nouws, Auteur ; A. Crispim, Auteur Année de publication : 2013 Article en page(s) : p. 111-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Teinture
Déchets -- Valorisation
Echarnage
Glutaraldéhyde
Hydrolysats de protéines
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The main objective of the present work was to study the effect of protein hydrolysates (HP) prepared from fleshings on leather dyeing. During previous studies it was found that the application of HP products, obtained from fleshings, in leather retannage intensified the colour of crust leather. In this work the CIELAB colour system was used to evaluate the effect of HP on retannage processes. The main conclusions of this study were: (i) HP can be used instead of a dicyanodiamide resin (Fortan DC) if the colour parameters of the standard procedure are to be maintained, and (ii) the replacement of an acrylic resin (Fortan A40) by glutaraldehyde-modified HP (GHP) results in a darker skin, and can therefore be interesting for the reduction of the quantity of dye used. En ligne : https://drive.google.com/file/d/1EHtGtnpl_byGnKXM02-muwHEK8ZIk1dB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18839
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Code-barres Cote Support Localisation Section Disponibilité 15193 - Périodique Bibliothèque principale Documentaires Disponible Alternative utilization of skin wastes-preparation of a fe(III)-loaded adsorbent for anionic dyes in aqueous solution / Yu-Lu Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
[article]
Titre : Alternative utilization of skin wastes-preparation of a fe(III)-loaded adsorbent for anionic dyes in aqueous solution Type de document : texte imprimé Auteurs : Yu-Lu Wang, Auteur ; Liao Xue-Pin, Auteur ; Ying-Chun Gu, Auteur ; Shi-Lin Zhao, Auteur ; Bi Shi, Auteur Année de publication : 2006 Article en page(s) : p. 205-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Colorants -- Adsorption
Colorants -- Elimination
Colorants acides
Cuirs et peaux -- Déchets -- Recyclage
Fer
Jaune
Solutions aqueuses (chimie)
Wet-white (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fe(III)-loaded adsorbent (FLA) was prepared from waste wet-white. As a new adsorbent, its behaviour towards anionic dyes, Direct Yellow 11 (DY11) and Acid Yellow 11 (AY11), were investigated. It was found that the FLA is effective in removal of anionic dyes from aqueous solution and acidic pH favours the adsorption. The adsorption capacity of DY11 was significantly increased with an increase of temperature, whilst that of AY11 decreased, due to their difference in molecular structures. The maximum adsorption capacities of DY11 and AY11 at 323K were found to be 302.1 and 490.0 mg.g-1 respectively and the adsorption equilibrium data can be well fitted by the Langmuir model. The adsorption kinetics could be accurately described by a pseudo-second-order rate model. Investigation of column adsorption process indicated that FLA is effective in removal of AY11 from water, and the column can be regenerated by using dilute NH3 solution. Note de contenu : - EXPERIMENTAL SECTION : Materials - Methods
- RESULTS AND DISCUSSION : Effect of initial pH on adsorption capacity - Effect of adsorbent dose on removal extent of dyes - Adsorption isotherms - Adsorption kinetics - Column adsorption kinetics
- Table 1 : The Langmuir andFreundlich parameters of dyes on FLA at different temperatures
- Table 2 : Adsorption kinetic model parameters of dyes on FLAEn ligne : https://drive.google.com/file/d/1eIC6sbiqaeiyHpymGJ_mmT5jma51cL7U/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39058
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 5 (09-10/2006) . - p. 205-210[article]Exemplaires
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