Synthesis of zeolite membrane (MCM-22/<i>α</i>-alumina) and its application in the process of oil-water separation

Barbosa, Antonielly Santos; Rodrigues, Meiry Gláucia Freire

doi:10.1080/19443994.2014.995719

Cited by 19 publications

(13 citation statements)

References 17 publications

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“…The results were 99% of oil rejection for the membrane NaA zeolite/α-alumina. Our research group has published some papers on the production of zeolite membranes and composite membranes [27][28][29][30][31][32][33][34][35][36][37][38][39]. Zhan et al [40] demonstrated novel thermally and chemically stable composite membranes consisting of halloysite nanotubes (HNTs) intercalated with graphene oxide (GO) coating on porous poly(arylene ether nitrile) (PEN) nanofibrous mat, which were prepared by controlled assembly of HNTs intercalated GO (skin layer) onto the surface of electrospun PEN nanofibrous mats (supporting layer) and further mussel-inspired polydopamine coating.…”

Section: Introductionmentioning

confidence: 99%

“…In light of the growth potential, the composite membrane (NaA zeolite/gamma-alumina) is expected to be used in processes that separate oil from water. Preparation of gamma-alumina (powder): the thermal decomposition of aluminum sulfate was carried out in a muffle furnace at 1000 ºC for 2 h using a heating rate of 5 ºC/min to produce gamma-alumina crystal phase [32].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and application of a composite NaA zeolite/gamma-alumina membrane for oil-water separation process

et al. 2020

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This study proposed the development of an efficient membrane composed of zeolite-alumina to be used for water-oil separation of wastewater effluents contaminated by oil extraction processes. The efforts made to care for the environment and to decontaminate bodies of water are extremely valuable and constantly being updated. Little research has been done on this subject and this study contributed to remedying this lack. Membrane technology is a reasonable alternative to conventional procedures if economics and eco-sustainability are considered. The objective of this study was to examine the performance of a composite membrane produced through mechanical mixing. The potential of the composite membrane (NaA zeolite/gama-alumina) to separate oil-water emulsions was tested. The results obtained demonstrated that the composite membrane is an excellent alternative for the oil/water emulsion separation process; the membranes are efficient and low-cost alternatives for treating oily wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and application of a composite NaA zeolite/gamma-alumina membrane for oil-water separation process

et al. 2020

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“…As the feed oil concentration increases, so does the fouling rate. There are also a number of papers reported for water/oil separation containing other types of surface modification including MCM [30], GO [31] and zinc cobalt oxides [24] with similar performances in terms of oil rejection as in this thesis.…”

Section: Discussion and Analysismentioning

confidence: 99%

“…The water flux is proportional to the cross-flow velocity once the filtrating system reaches steady state, until then, the flux is compromised by a continuous build-up of the foulant on the feed side of the membrane [30]. The relation between feed concentration and flux is inversely proportional which means that higher oil feed concentration decreases water flux due to concentration buildup at the interface [23].…”

Section: Membrane Technologymentioning

confidence: 99%

Investigation of vacuum-assisted preparation methods of inorganic membranes

Jalil¹

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This research project systematically investigated the pore size tailoring of inorganic derived membranes by a novel vacuum-assisted preparation method. In particular, the effect of vacuum exposure time on the morphological features of the as-prepared membranes was investigated.Phenolic resin and titanium (IV) propoxide (TTP) precursors were chosen for the synthesis of carbon and titania membranes, respectively. The innovation in this study is that the preparation method is based on a combined dip-coating and vacuum-assisted method which has not been explored in literature. The pore size of the membranes was tailored by varying the vacuum times during preparation (0-1200s). The membranes were characterised by measuring the flux for a variety of organic substances, each having a different molecular weight cut-off.The first major contribution of this work is the effective preparation of carbon and titania membranes via the vacuum-assisted method. This has not been achieved before in the literature. no vacuum exposure. The membranes were also able to achieve rejections close to 100% for large MW PVP-360000 organics. However, no significant separation was observed for the lower MW glucose and sucrose. Separation values were measured for PVP-40000, and the carbon membranes delivered higher rejection than the titania membranes. The results suggest that the effect of vacuum time on pore size was stronger for the carbon membranes compared to the titania membranes.The second contribution of this thesis is related to the proposed mechanism of formation of the carbon membranes derived from the phenolic resins. It was found that the vacuum-assisted method imparted different morphologies and even influenced the chemistry of the carbon membranes.Specifically, resin crosslinking reactions were promoted as a function of the vacuum time. Further, pore volumes and surface areas increased from 0.81 cm 3 g -1 and 834 m 2 g -1 to 2.2 cm 3 g -1 and 1910 m 2 g -1 as the respective vacuum exposure time increased from 0 to 1200 s. This work postulates that a cluster to cluster aggregation mechanism brought the phenolic oligomers in close proximity, initiating polycondensation and the formation of micro porous regions. Concomitantly, the distances between the clusters increased creating meso and macroporous regions. This results in increased water fluxes due to a reduction of mass transfer resistance as pore volume increased as a function of the vacuum time.iiThe third contribution of this thesis is related to the structural formation of the titania membranes by the vacuum-assisted method. The aggregation of Ti-O-Ti networks to form titania nanoparticles increased in proportion to vacuum exposure time. Further, the thesis proposes that upon calcination the titania crystallite size increased as a function of the vacuum time, accompanied by an increase in particle size. Therefore, porosity was controlled by the inter-particle void, which is a function of the particle size. As the particle size of titania increased, the water flux of...

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“…Zeolite frameworks are classified by a three letter code that is assigned by the IZA for each unique framework structure. Among these the following are reported as frameworks used for membrane fabrication, AEI [25][26][27], BEA [28,29], CHA [19,[30][31][32][33][34][35][36][37], DDR [38][39][40][41], FAU [42][43][44][45], FER [46], LTA [47][48][49][50][51], LTL [52], MEL [53][54][55], MFI [20,22,29,[56][57][58][59][60][61][62][63][64], MOR [65,66] and MWW [67][68][69][70].…”

Section: Zeolite Membranesmentioning

confidence: 99%

From Amorphous Silica Membranes to Crystalline High-Silica Zeolite Membranes: New Avenues for the Fabrication of Microporous Inorganic Membranes for Gas Separation Applications

Karakiliç

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Synthesis of zeolite membrane (MCM-22/α-alumina) and its application in the process of oil-water separation

Cited by 19 publications

References 17 publications

Synthesis and application of a composite NaA zeolite/gamma-alumina membrane for oil-water separation process

Synthesis and application of a composite NaA zeolite/gamma-alumina membrane for oil-water separation process

Investigation of vacuum-assisted preparation methods of inorganic membranes

From Amorphous Silica Membranes to Crystalline High-Silica Zeolite Membranes: New Avenues for the Fabrication of Microporous Inorganic Membranes for Gas Separation Applications

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