Abstract
In this paper, copper benzene-1,3,5-tricarboxylate (CuBTC) was incorporated into polyethylenglyol (PEG) to prepare a mixed matrix membrane (MMM) for pervaporation desulfurization. The characterization results showed that the prepared CuBTC particles had an ideal octahedral shape and micropores. The Cu2+ in CuBTC interacts with thiophene via π-complexation, thus enhancing the separation performance of the hybrid membranes. The effect of CuBTC content and the operating condition on the pervaporation performance of the MMMs was investigated. An optimal pervaporation separation performance was acquired with a permeation flux of 2.21 kg/(m2·h) and an enrichment factor of 8.79, which were increased by 100% and 39% compared with the pristine PEG membrane. Moreover, the CuBTC-filled PEG membrane showed a good stability in the long-term desulfurization under a high operating temperature of 75 °C for five days.
Highlights
Gasoline is one of the most prominent energy sources in society, as it can provide enough fuel for vehicles, ships and aviation aircraft
After thoroughly stirring with a magnetic stirrer, the mixed solution was cast on polyvinylidene fluoride (PVDF) porous supporting membranes and allowed to stand at ambient temperature overnight to volatilize the solvents followed by crosslinking at a high temperature of 353 K
A series of methods such as FTIR, SEM and XRD were used to characterize the CuBTC particles. It can be seen from the FT-IR spectra of the CuBTC powder that is illustrated in Figure 3a that the
Summary
Gasoline is one of the most prominent energy sources in society, as it can provide enough fuel for vehicles, ships and aviation aircraft. The reduction of the sulfur content of gasoline via hydrodesulfurization [1], adsorption desulfurization [2], oxidation desulfurization [3], alkylation desulfurization [4] and biocatalytic desulfurization [5] has been well reported. These desulfurization processes have drawbacks, so the latest high-efficiency deep desulfurization process needs to be expanded. Owing to its favorable film-forming properties, flexibility, and good desulfurization performance, PEG is the most preferential polymer material for pervaporation desulfurization To further strengthen their desulfurization performance, PEG membranes are modified by filling them with inorganic particles. This method can ensure the uniformity of the prepared CuBTC particles, which is important for elevating the permeability and selectivity of the PEG polymer membrane
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