Effects of mineralogical composition into the reactivity of calcinated ilmenite for chemical looping technologies

Autor(es)

de Matos, Caroline Silva ; Ulsen, Carina ; Filho, Fernando Luiz Sacomano

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 35, p. 11-pg., 2025-02-20.

Resumo

Ilmenite is one of the most promising oxygen carriers (OC) for chemical looping combustion (CLC) on a large scale. However, ilmenite samples from distinct mines submitted to diverse mineral processing procedures do not have homogeneous physicochemical characteristics, impacting the design and feasibility of chemical looping technologies. In this study, the comparative technological characterization of six samples of calcined ilmenite concentrate obtained from diverse sources was performed to understand the most critical parameters affecting their reactivity toward methane. Results evidenced differences in reactivity of the samples regarding the temperature at which reduction starts (Tinitial), the temperature onset (Tonset), and mass change between 800 and 995 degrees C. Although such differences result from a sum of factors, particle size distribution and the partition of Fe into diverse phases, including silicates, play a vital role in the samples' reactivity. The findings herein pointed out pathways to prioritize standardization into ilmenite characterization to establish guidelines for sample selection on developing OCs for CLC. (AU)

• Processo FAPESP: 20/15230-5 - Centro de Pesquisa e Inovação de Gases de Efeito Estufa - RCG2I
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 09/54007-0 - EMU: aquisição de equipamentos complementares e de apoio para facility de microscopia eletrônica de varredura
• Beneficiário: Henrique Kahn
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários