resumo
The application of a catalytic membrane in the oxidative desulfurization of a multicomponent model diesel formed by most refractory sulfur compounds present in fuel is reported here for the first time. The catalytic membrane was prepared by the impregnation of the active lamellar [Gd(H(4)nmp)(H2O)(2)]Cl center dot 2H(2)O (UAV-59) coordination polymer (CP) into a polymethyl methacrylate (PMMA, acrylic glass) supporting membrane. The use of the catalytic membrane in the liquid-liquid system instead of a powder catalyst arises as an enormous advantage associated with the facility of catalyst handling while avoiding catalyst mass loss. The optimization of various parameters allowed to achieve a near complete desulfurization after 3 h under sustainable conditions, i.e., using an aqueous H2O2 as oxidant and an ionic liquid as extraction solvent ([BMIM]PF6, 1:0.5 ratio diesel:[BMIM]PF6). The performance of the catalytic membrane and of the powdered UAV-59 catalyst was comparable, with the advantage that the former could be recycled successfully for a higher number of desulfurization cycles without the need of washing and drying procedures between reaction cycles, turning the catalytic membrane process more cost-efficient and suitable for future industrial application.
palavras-chave
METAL-ORGANIC FRAMEWORK; OXIDATIVE DESULFURIZATION; FOSSIL-FUELS; MODEL DIESEL; SULFUR; POLYOXOMETALATE; PERFORMANCE; FUTURE
categoria
Biochemistry & Molecular Biology; Chemistry, Multidisciplinary
autores
Mirante, F; Mendes, RF; Faria, RG; Cunha-Silva, L; Paz, FAA; Balula, SS
nossos autores
Filipe Alexandre Almeida Paz
Investigador Principal
Ricardo Faria Mendes
Investigador Júnioragradecimentos
This research work received financial support from Portuguese national funds (FCT/MCTES, Fundacao para a Ciencia e a Tecnologia and Ministerio da Ciencia, Tecnologia e Ensino Superior) through the strategic projects UIDB/50006/2020 (for LAQV-REQUIMTE) and UIDB/50011/2020 and UIDP/50011/2020 (for CICECO). Parts of this work were performed with funds from the European Union (FEDER funds through COMPETE POCI-01-0145-FEDER-031983) and FCT/MCTES by National Funds to the R&D project GlyGold (PTDC/CTM-CTM/31983/2017).