The control of pore geometry and pore diameter of silica mesoporous materials is necessary for application of these materials, mainly in industrial process that depends on the shape selectivity. This way, considerable ...

The silica with structure MCM-41 has a hexagonal mesoporous arrangement with one dimensional pore system. This silica as synthesized contains cations (usually the CTA+) in your pores and catalytic sites with basic character ...

The search for clean and renewable fuels has aroused great interest in the industry and scientific community with the growing demand for energy. The transesterification reaction of triglycerides is one way of achieving a ...

Homogeneous catalysis is the most used process in the production of biodiesel, although this process has several disadvantages such as: the catalyst cannot be easily reused and requires parallel processes for separation ...

The master degree work presented is a result of a research conducted together with a group, which has worked on the modification of the synthesis CTA-MCM-41, that silica belongs to the mesoporous materials family (composed ...

Heterogeneous catalysts are potentially responsible for reducing the cost of producing biodiesel, due to its reusability or use in continuous process. As-synthesized hybrid silicas, containing siloxy sites, can be used as ...

The sol-gel process allows to produce organic-inorganic hybrid materials (OIHM), which can be obtained in various shapes such as particles, fibers, glass gels and thin films, with several applications. Among these materials, ...