01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Setor sucroalcooleiro em Pernambuco: uma análise sobre a produção de etanol entre 2000 e 2022(2024-03-07) Silva, Antônio Duarte Marques Oliveira da; Melo, André de Souza; http://lattes.cnpq.br/8808755622712441; http://lattes.cnpq.br/0193793183041821As an alternative to remedy the impacts caused by the oil shocks of the 1970s, PROALCOOL was a program that was successful in promoting the biofuel ethanol, however, since deregulation, the sugar and alcohol sector has gone through several phases of growth and declines in production, influenced due to various political and market factors. The general objective of this work is to understand and analyze the gross production of ethanol in Pernambuco between 2000 and 2022. To this end, the specific objectives were to describe the historical context of ethanol production in Pernambuco and Brazil, to identify the main factors that influenced production throughout throughout the analyzed series and understand the relationship between price, sales and productivity with ethanol production. As a methodology used, a bibliographical review, graphical analyzes and descriptive statistics were carried out. The research results showed that ethanol production in Pernambuco over the last few decades has been influenced by several factors and that despite the measures adopted by the government to stimulate the sector in recent years, it still faces challenges in ensuring continuous and competitive growth. to consumers. Justifying that it is essential to understand the policies adopted for ethanol and their impact on the market and society. The historical analysis of these policies and their results can contribute to the development of new strategies for the future.Item Estudo do poder catalítico de óxidos a base de resíduos de carapaças de sururu na síntese de biodiesel etílico e metílico a partir do óleo de fritura(2021-07-16) Silva, Jeane Rego da; Silva, Claudia Cristina Cardoso da; http://lattes.cnpq.br/9810071055429520; http://lattes.cnpq.br/5899758335174071The search for alternative solutions to oil consumption has been growing, due to the alarming acceleration of global warming. As an alternative, the use of green chemistry appears in order to revert this aggressive process to the environment, and biofuels appear as allies. Among biofuels, biodiesel is shown as an alternative in reducing greenhouse gases. Its production consists of the transesterification reaction of vegetable oil or animal fat with a short-chain alcohol, in the presence of a catalyst. On an industrial scale in Brazil, biodiesel is synthesized from soybean oil and methanol, under sodium methoxide catalysis. These 3 parameters do not favor the renewable character of biodiesel since; i) soy oil competes with a food; ii) methanol has a fossil origin which becomes meaningless when producing a renewable fuel; and iii) sodium methoxide is a homogeneous, non-reusable catalyst and needs to be removed with an aqueous solution in order to purify the biodiesel, generating a huge volume of effluents which, ultimately, also diminishes the environmental appeal of biodiesel as a biofuel. With all of this in mind, this work consisted of the study of the catalytic power of calcium oxide generated from the residues of shells from sururu, in order to produce biodiesel under the analysis of several parameters; i) ethanol and methanol as reagent alcohol; ii) neutral soybean oil and frying oil with 2 different acidity indices as starting oil; and iii) different reaction times in order to determine the kinetic behavior of this catalyst under each of these different parameters. Homogeneous catalysis was also performed in order to observe its behavior under extreme conditions and compare this behavior with heterogeneous catalysis. From studies of FTIR spectra, we verified the high catalytic efficiency of our oxide in the production of methyl biodiesel, both in neutral oil and in different acidic frying oils. This reaction success was attributed to the conversion of triglyceride to methyl esters above 95%. For the case of neutral oil, this efficiency was reached after 1 h of reaction and in the other cases after 3 to 4 h of reaction. The same success when observing the catalytic efficiency of converting soybean oil into ethylic biodiesel was also verified through the FTIR spectra, but this time without a calibration curve, which made a quantitative analysis impossible.Item Manejo produtivo de cana-de-açúcar na Usina Central Olho d’água(2021) Lima Filho, Cícero José de; Gonçalves Neto, Álvaro Carlos; http://lattes.cnpq.br/1044585519530220; http://lattes.cnpq.br/1946533194350755