Octane improvement of gasoline with porous solids

In this work is performed the study of the hexane isomers separation with MOFs in order to improve the octane number of gasoline. The studies were performed with MOFs: MIL-125-Amine, MIL-53(Fe)-Cl, MIL-53(Fe)-Br and Fe-TazBz(DMF). It was observed that higher loadings were obtained for high pressure and low temperature. With MOFs like MIL-53(Fe)-Cl and MIL-53(Fe)-Br the components weren’t separated. In MIL-125-Amine hexane isomers were separated according to their boiling point, but the selectivity was small. The best result was obtained with MOF Fe-TazBz(DMF), because of the higher affinity of n-hex with this MOF, the separation from the other isomers was easier.

Neste trabalho, mostra-se a capacidade de separação de isómeros do hexano com MOFs para aumentar o índice de octano da gasolina. O estudos fizeram-se nos MOFs: MIL-125-Amine, MIL-53(Fe)-Cl, MIL-53(Fe)-Br and Fe-TazBz(DMF). Observou-se que as maiores capacidades obtêm-se para a temperatura baixa e pressão alta. Nos MOFs MIL-53(Fe)-Cl e MIL-53(Fe)-Br os componentes não foram separados. No MOF MIL-125-Amine os isómeros foram separados seguindo aponto normal de ebulição dos compostos mas a selectividade é baixa. O melhor resultado obteve-se para o MOF Fe-TazBz(DMF) devido à maior afinidade deste composto com o MOF separando-o dos outros isómeros.