Made available in DSpace on 2014-06-11T19:31:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-11-17Bitstream added on 2014-06-13T20:02:19Z : No. of bitstreams: 1 goncalves_je_dr_botfca.pdf: 4162560 bytes, checksum: 2fca33c2f151fb46cd2ee8664865be71 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Este trabalho avaliou energéticamente e ambientalmente briquetes para a geração de energia. Os materiais utilizados para a fabricação dos briquetes foram Rejeitos de Resíduos Sólidos Urbanos (RRSU) com resíduos madeireiros Eucalyptus grandis e aglutinantes: resíduo lignocelulósico de mandioca e finos de carvão vegetal. As amostras dos RRSU foram coletadas na Usina de Triagem e Compostagem de Lixo de Lençóis Paulista, atualmente descartados em aterro sanitário municipal e os resíduos madeireiros em serrarias do município de Botucatu-SP. Esse estudo teve o objetivo de gerar alternativas para minimizar a quantidade de material destinado aos aterros com responsabilidade social e ambiental. Os briquetes foram fabricados com 15, 16, 17, 18 e 20% de RRSU na mistura com resíduos madeireiros e aglutinantes. Os resultados da análise do Poder Calorífico Superior (PCS) realizadas nos briquetes mostraram que este valor do PCS aumenta na medida em que a porcentagem dos RRSU aumenta. Briquetes de resíduos de madeira apresentaram Poder Calórico Inferior (PCI) de 19544,20 kJ/kg, valor significativamente menor ao encontrado para briquetes com 20% RRSU, o qual foi de 21617,66 kJ/kg. Este fato anterior se deve a influência dos produtos derivados do petróleo que estão presentes nos RRSU, como por exemplo, os termoplásticos, com PCS médio na ordem de 34039,67 kJ/kg. É preciso pesquisar o efeito da porcentagem de RRSU sobre a resistência mecânica dos briquetes. Análises cromatográficas foram realizadas para analisar os vapores produzidos na pirólise dos briquetes, visando caracterizar os produtos formados durante a sua decomposição térmica e avaliar preliminarmente o efeito que poderá causar ao meio ambiente. Os resultados evidenciaram a presença de compostos poluidores provenientes da composição dos RRSU como foi o caso do estireno e outros produtos de alta massa molecular... / This Work evaluates the energy and environmental optimization of briquettes for power generation. The materials used for the production of briquettes were rejects from municipal solid waste (RMSW) wood waste with Eucalyptus grandis and binders: residue lignocellulosic cassava and thin charcoal. Samples of RMSW were collected in the recycling and composting plant waste Lençóis, currently discarded in the municipal landfill and waste wood sawmills in the municipality of Botucatu-SP. This study was to generate alternatives to minimize the amount of material destined for landfills with social and environmental responsibility. Briquettes are manufactured with 15, 16, 17, 18 and 20% RMSW in mixture with waste wood and binders. The results of Higher Caloric power analysis (HCP) held in briquettes showed that the value of HCP increases insofar as the percentage of RMSW increases. Waste wood Briquettes made Lower Calorific Power (LCP) 19544.20 kJ/kg significantly lower the value found for briquettes with 20%, which was RMSW 21617.66 kJ/kg. The fact earlier due to influence of oil-derived products that are present in RMSW, as for example, thermoplastics, which have CPs middle 34039.67 kJ/kg. This result can be improved by adjusting the conditions of operation of briquetting machine such as pressure and temperature. The percentage of RMSW effect on the mechanical strength... (Complete abstract click electronic access below)

Roll press briquetting of coal-biomass mixtures presents a significant opportunity to address feedstock challenges associated with co-utilization of coal and biomass in existing coal-fired facilities. However, several technical and economic barriers require further investigation prior to industrial utilization of coal-biomass briquettes. The scientific contributions presented in this dissertation are intended to address the most critical technical challenges pertaining to coal-biomass briquette feedstocks. As with any product of an agglomeration process, the primary technical challenge regarding coal-biomass briquettes is achieving and maintaining a high level of quality from production to utilization. Several laboratory-scale research investigations were conducted to address this challenge. The first study was conducted to identify, develop and refine methods to characterize the most important physical properties indicative of coal-biomass briquette quality. The outcome of this work is a set of recommendations for novel and refined methods to characterize important coal-biomass briquette properties. The second study was conducted to develop a novel method to identify the optimum water content of coal-biomass blends prior to briquette production. As a result of this study, the Briquette Proctor Test was developed to minimize the time and materials required to identify the optimum water content that corresponds to maximum quality of coal-biomass briquettes. The third study was conducted to evaluate the influence of feedstock variables, additive variables, and roll press operating parameters in the production of coal-biomass briquettes from various coal and biomass types. From this study, the influence of each parameter on the quality of briquettes was determined and optimum conditions were identified for a variety of coal-biomass mixtures. The fourth and final study was conducted to develop and evaluate methods to improve the water resistance of coal-biomass briquettes using wood-derived chemicals. Using these chemicals, the novel coating method developed in this study significantly improved the water resistance and weathered durability of coal-biomass briquettes. / Ph. D.

Resumo: Este trabalho avaliou energéticamente e ambientalmente briquetes para a geração de energia. Os materiais utilizados para a fabricação dos briquetes foram Rejeitos de Resíduos Sólidos Urbanos (RRSU) com resíduos madeireiros Eucalyptus grandis e aglutinantes: resíduo lignocelulósico de mandioca e finos de carvão vegetal. As amostras dos RRSU foram coletadas na Usina de Triagem e Compostagem de Lixo de Lençóis Paulista, atualmente descartados em aterro sanitário municipal e os resíduos madeireiros em serrarias do município de Botucatu-SP. Esse estudo teve o objetivo de gerar alternativas para minimizar a quantidade de material destinado aos aterros com responsabilidade social e ambiental. Os briquetes foram fabricados com 15, 16, 17, 18 e 20% de RRSU na mistura com resíduos madeireiros e aglutinantes. Os resultados da análise do Poder Calorífico Superior (PCS) realizadas nos briquetes mostraram que este valor do PCS aumenta na medida em que a porcentagem dos RRSU aumenta. Briquetes de resíduos de madeira apresentaram Poder Calórico Inferior (PCI) de 19544,20 kJ/kg, valor significativamente menor ao encontrado para briquetes com 20% RRSU, o qual foi de 21617,66 kJ/kg. Este fato anterior se deve a influência dos produtos derivados do petróleo que estão presentes nos RRSU, como por exemplo, os termoplásticos, com PCS médio na ordem de 34039,67 kJ/kg. É preciso pesquisar o efeito da porcentagem de RRSU sobre a resistência mecânica dos briquetes. Análises cromatográficas foram realizadas para analisar os vapores produzidos na pirólise dos briquetes, visando caracterizar os produtos formados durante a sua decomposição térmica e avaliar preliminarmente o efeito que poderá causar ao meio ambiente. Os resultados evidenciaram a presença de compostos poluidores provenientes da composição dos RRSU como foi o caso do estireno e outros produtos de alta massa molecular... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This Work evaluates the energy and environmental optimization of briquettes for power generation. The materials used for the production of briquettes were rejects from municipal solid waste (RMSW) wood waste with Eucalyptus grandis and binders: residue lignocellulosic cassava and thin charcoal. Samples of RMSW were collected in the recycling and composting plant waste Lençóis, currently discarded in the municipal landfill and waste wood sawmills in the municipality of Botucatu-SP. This study was to generate alternatives to minimize the amount of material destined for landfills with social and environmental responsibility. Briquettes are manufactured with 15, 16, 17, 18 and 20% RMSW in mixture with waste wood and binders. The results of Higher Caloric power analysis (HCP) held in briquettes showed that the value of HCP increases insofar as the percentage of RMSW increases. Waste wood Briquettes made Lower Calorific Power (LCP) 19544.20 kJ/kg significantly lower the value found for briquettes with 20%, which was RMSW 21617.66 kJ/kg. The fact earlier due to influence of oil-derived products that are present in RMSW, as for example, thermoplastics, which have CPs middle 34039.67 kJ/kg. This result can be improved by adjusting the conditions of operation of briquetting machine such as pressure and temperature. The percentage of RMSW effect on the mechanical strength... (Complete abstract click electronic access below) / Orientador: Alcides Lopes Leão / Coorientador: Maria Márcia Pereira Sartori / Banca: Assunta Maria Marques da Silva / Banca: Claudio Cabello / Banca: Vera Lucia Pimentel Salazar / Banca: Claudia C.Teixeira R. A. Camarinha / Doutor