Sba-15 Molecular Sieve: Synthesis, Characterization, and Application in Oil/Water Separation

Abstract

This work evaluates the use of molecular sieve SBA-15 as adsorbent in oil removal process. The synthesis and characterization tests used X-ray Diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX), physical N 2 adsorption, Scanning Electron Microscopy (SEM), adsorption capacity in organic solvents (gasoline, kerosene, and diesel oil), and Foster Swelling. Following, this work performed the evaluation of SBA-15 as adsorbent in the process of removing oil from a synthetic effluent, through the finite bath system (Batch adsorption). Finite bath system tests used a factorial 2 2 experimental design with three experiments at the central point. At that stage, two variables were evaluated: initial oil concentration (100, 300, and 500 mg /L) and mechanical agitation (100, 200, and 300 rpm). Through the experiments, it was possible to observe the following response variables: percentage of total removal (% R em) and removal capacity in equilibrium (q eq). For comparison level, the experiments also evaluated response variables for the tests without mechanical agitation. Characterization techniques (DRX, EDX, SEM, Physical N 2 Adsorption) presented results compatible with the characteristics presented by mesoporous materials. Foster Swell tests confirmed the affinity of SBA-15 molecular sieve with the organic solvents used: gasoline, kerosene, and diesel oil. The testing system determined both finite bath oil removal percentage (% R em) 97.04%, and removal capacity at equilibrium (q eq) of 48.58 mg /g, indicating that the use of SBA-15 molecular sieve is a viable option in the oil removal process.

Green Synthesis for MCM-41 and SBA-15 Silica Using the Waste Mother Liquor

“…This study is part of a line of research developed at the Laboratory for the Development of New Materials-LABNOV at UFCG. This line of research covered a series of studies on the synthesis and characterization of molecular sieves through different processes [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. This study aims to reuse the mother liquor in three subsequent syntheses of the SBA-15 and MCM-41 molecular sieves to assess any possible changes in the physical, chemical, and morphological properties of each material.…”

Adsorption of Rhodamine-B (RhB) and Regeneration of MCM-41 Mesoporous Silica

“…This study is part of a line of research developed at the New Materials Development Laboratory (LABNOV) at the UFCG. This line of research covered a series of studies on the synthesis and characterization of molecular sieves, which could be used in various processes [27][28][29][30][31][32][33][34][35][36][37][38][39][40]. This work was carried out in two stages, the first stage presented the obtained results on the characterization of both MCM-41 and MCM-41 calcined.…”