Sulfur removal from fuel using zeolites/polyimide mixed matrix membrane adsorbents

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Sulfur removal from fuels is crucial for environmental protection and engine performance.
• Existing desulfurization methods face challenges in efficiency and regeneration.

Purpose of the Study:

• To develop and characterize novel mixed matrix membranes (MMMs) for efficient sulfur removal from fuels.
• To investigate the structure-property-performance relationship of MMMs composed of polyimide (PI) and Y zeolites.

Main Methods:

• Preparation of MMMs adsorbents with varying Y zeolite content.
• Characterization using FT-IR, FESEM, thermal, and mechanical analyses.
• Evaluation of adsorption and desorption performance under various conditions.

Main Results:

• MMMs with 40% zeolite content exhibited enhanced physical properties.
• NaY/PI, AgY/PI, and CeY/PI MMMs showed sulfur adsorption capacities of 2.0, 7.5, and 7.9 mg S/g, respectively.
• Regeneration efficiencies reached up to 98% for NaY/PI, 90% for AgY/PI, and 70% for CeY/PI.

Conclusions:

• The developed MMMs demonstrate significant potential for fuel desulfurization.
• Adsorption and desorption behavior are strongly influenced by the type of zeolite and its interaction with sulfur compounds.
• The process-structure-function relationship provides insights for designing advanced adsorbents.