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You searched for +publisher:"Universidade Estadual de Campinas" +contributor:("Pereira, Nehemias Curvelo"). Showing records 1 – 3 of 3 total matches.

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Universidade Estadual de Campinas

1. Stragevitch, Andrea Selene Embirassu Xavier. Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico.

Degree: 1996, Universidade Estadual de Campinas

Abstract: Not informed. Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Andrade, Alberto Luiz de, 1947- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Química (institution), Programa de Pós-Graduação em Engenharia Química (nameofprogram), Pereira, Nehemias Curvelo (committee member), Gasparetto, Carlos Alberto (committee member), Cruz, Sandra Lúcia da (committee member), Tambourgi, Elias Basile (committee member).

Subjects/Keywords: Absorção; Massa - Transferência; Calor - Transmissão

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Stragevitch, A. S. E. X. (1996). Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/266359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Stragevitch, Andrea Selene Embirassu Xavier. “Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico.” 1996. Thesis, Universidade Estadual de Campinas. Accessed November 28, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Stragevitch, Andrea Selene Embirassu Xavier. “Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico.” 1996. Web. 28 Nov 2020.

Vancouver:

Stragevitch ASEX. Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico. [Internet] [Thesis]. Universidade Estadual de Campinas; 1996. [cited 2020 Nov 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stragevitch ASEX. Absorção com reação quimica em processos de borbulhamento : casos isotermico e não-isotermico. [Thesis]. Universidade Estadual de Campinas; 1996. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade Estadual de Campinas

2. Ayub, Gamel Said Eduardo. Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional.

Degree: 1997, Universidade Estadual de Campinas

Abstract: The main objective of this work was the development of an experimental apparatus for coating of urea with sulphur. The experimental results allowed to quantify the relation between the quality of the product obtained and the process variables: spout air temperature, sulphur mass flowrate and mass flowrate of atomization air. The quality of the coated urea was evaluated by the dissolution rate of urea through the sulphur, D25%, and by electronic microscopy. The growth of the partic1e and process efficiency were also evaluated. The particles of urea utilized have a quasi-spherical shape. The two dimensional spouted bed was proper1y designed to provi de an adequate solids circulation, with a slanted base angle of 60°. It was built in plexyglass so the flow inside the bed could be observed. The following process conditions were specified for the experiments: inlet air temperature maintained at 69.0°C and 82.5°C, liquid sulphur mass flowrates of 26.8g1min and 33.9g1min and atomization air mass flowrates of 1.0m3 Ih and 1. 4m3 Ih. A double-fluid atomizer was installed in the bottom of the bed and the liquid sulphur was sprayed co-current1y with the air inlet. A factorial planning was the guide for the number of experiments needed. The results showed that the liquid sulphur mass flowrate significatively influences the growth ofthe urea partic1es and the variables that influences the coating quality, in terms of the dissolution rate are the inlet air temperature and the flowrate of atomizing air. The values obtained for the coating efficiency were satisfactory, in the range of 80.34% - 88.93%. The microscopic analysis showed that the inert particles of urea presented holes in their surface and these holes were not totally filled after the coating process. This defect on the surface provided the high urea dissolution rates obtained. It was observed that for the higher leveI of inlet air temperature used, the surface of the coated partic1e showed less defects, and the holes were partially or totally covered leading to a lower urea dissolution rate or better product quality. The sulphur crystals formed during the coating process were smaller, not regular for the lower air inlet temperature, while for the higher temperature of the inlet air the crystals are larger and better grouped together leading to a regular coated surface Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Rocha, Sandra Cristina dos Santos, 1957- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Química (institution), Programa de Pós-Graduação em Engenharia Química (nameofprogram), Zanin, Gisella Maria (committee member), Pereira, Nehemias Curvelo (committee member), Menegalli, Florencia Cecilai (committee member), Silva, Meuris Gurgel Carlos da (committee member).

Subjects/Keywords: Revestimentos; Fertilizantes nitrogenados; Processos de fabricação; Ureia como fertilizante; Enxofre; Processo de leito de jorro

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ayub, G. S. E. (1997). Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/267522

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ayub, Gamel Said Eduardo. “Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional.” 1997. Thesis, Universidade Estadual de Campinas. Accessed November 28, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267522.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ayub, Gamel Said Eduardo. “Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional.” 1997. Web. 28 Nov 2020.

Vancouver:

Ayub GSE. Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional. [Internet] [Thesis]. Universidade Estadual de Campinas; 1997. [cited 2020 Nov 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/267522.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ayub GSE. Desenvolvimento de processo de recobrimento de ureia com enxofre utilizando leito de jorro bidimensional. [Thesis]. Universidade Estadual de Campinas; 1997. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/267522

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade Estadual de Campinas

3. Vieira, Melissa Gurgel Adeodato, 1979-. Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper.

Degree: 2006, Universidade Estadual de Campinas

Abstract: Even though the great technological advances, the paper still carries out an important role in the culture and in the diffusion of information. Although it is produced by a renewable source, as the wood, technology allowing paper reuse is available. A selective pick up is necessary for the pulp processing from recovered fibers. The paper recycling allows a great reduction of the amount of urban solid residues, avoiding the use of natural sources as wood and water, besides decreasing a lot the energy consumption in the paper industry. The production of the cellulose pulp is the first great energy consumer in the process of paper production, followed by the paper drying process. The drying is a complex process, of great importance, not only in energy terms, but for the quality of the final product. In this context, this work had the objective to analyze the drying of cellulose pulp made from recovered fibers for the production of card type recycled paper. For this, a convective dryer was projected, in laboratorial scale, for the drying of the paper pulp. The drying curves as a function of different operating conditions were analyzed and the paper dessorption isotherms were determined by the dynamic method. An analysis of the product quality was accomplished for different conditions, as well as the process energy consumption evaluation. A comparative study between the natural drying (used in small productions) and the drying by forced convection was also effectuated. To complement the drying analysis, the shrinkage of the paper was evaluated during the drying and related to the operating conditions, physical characteristics and quality of the product. The dryer developed in this work showed to be appropriate for the drying of the recycled card type paper , presenting energy efficiency compatible with dryers used in paper industries (24,53%). It was verified that the increase of the temperature and velocity of the drying air influenced the process reducing the drying time. However, the quality of the paper is poor for severe operating conditions, leading to a less uniform final product, having a very dry surface. In the paper shrinkage study during drying, as well as in the analysis of the surface quality, similar results were gotten for the papers dried at 70 and 80°C. Significant modifications of structural properties and a low quality of the product were verified for the paper dried at 90°C, indicating a limit to the air temperature for the convective drying of the analyzed recycled papeI. The paper dried at 90°C suffered 15% of surface shrinkage and also 40% of linear and volume reduction during the falling rate drying phase. The paper dried under softer operating conditions (66°C; O,22m/s) presented characteristics similar to the paper naturally dried. Thus, a type card recycled paper can be producted with adequate quality using the convective drier, reducing significantly the necessary time for the drying af the paper sheet Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Rocha, Sandra Cristina dos Santos, 1957- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Química (institution), Programa de Pós-Graduação em Engenharia Química (nameofprogram), Park, Kil Jin (committee member), Freire, Jose Teixeira (committee member), Pereira, Nehemias Curvelo (committee member), Moris, Virginia Aparecida Silva (committee member).

Subjects/Keywords: Papel - Secagem; Residuos de papel - Reaproveitamento; Celulose; Cooperativas de produtores; Cooperativas; Paper dryng; Recycled paper; Cellulose pul; Convective drier; Shrinkinger

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Vieira, Melissa Gurgel Adeodato, 1. (2006). Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/266275

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Vieira, Melissa Gurgel Adeodato, 1979-. “Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper.” 2006. Thesis, Universidade Estadual de Campinas. Accessed November 28, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266275.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Vieira, Melissa Gurgel Adeodato, 1979-. “Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper.” 2006. Web. 28 Nov 2020.

Vancouver:

Vieira, Melissa Gurgel Adeodato 1. Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper. [Internet] [Thesis]. Universidade Estadual de Campinas; 2006. [cited 2020 Nov 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266275.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vieira, Melissa Gurgel Adeodato 1. Analise da secagem de polpa de celulose para a obtenção de papel reciclado tipo cartão: Analysis of cellulose pulp dryng for the production of card type recycled paper. [Thesis]. Universidade Estadual de Campinas; 2006. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/266275

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.