Carbonatação de escória de aciaria: uma alternativa para o sequestro de CO2

• Ano de defesa: 2009
• Autor(a) principal: Nienczewski, Jonatã Rangel
• Orientador(a): Ligabue, Rosane Angélica
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: ENGENHARIA DE MATERIAIS; DIÓXIDO DE CARBONO; EFEITO ESTUFA; CARBONATOS
• Link de acesso: http://hdl.handle.net/10923/3312

The world has always been worried about the environment. The greenhouse effect is most popular issue today. Carbon dioxide is one of the gases produced by mankind which has been on the spot lately, due to the fact that it is direct related to the greenhouse effect. A lot of work has been done trying to minimize the emissions of this gas, namely, biofuel, geological storage, oceanic storage, mineral carbonation and alkaline waste carbonation. The aim of this project is to develop a method of CO2capture and storage using a low price alkaline waste, steel slag. This waste has a high concentration of magnesium and calcium oxides, which are good for long term storage of this greenhouse gas. The method includes leaching the main components from the slag for a subsequent carbonation flowing CO2 throw the solution. The overall yield of the process – extraction and carbonation – proved to be significant (83%). The purity of the calcium carbonates obtained of 97%, showing that is really possible to have commercial products from the indirect steel slag carbonation.