Catalytic Emulsion Based on Janus Nanosheets for Ultra‐Deep Desulfurization

Xia, Lixin; Zhang, Hairan; Zhou, Weili; Yi, Jie; Zhang, Ling; Zhao, Jie; Zhang, Junhui; Dong, Li Min; Li, Erni; Zhang, Qian

doi:10.1002/chem.201604737

Cited by 41 publications

(31 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It consists of two steps: the oxidation of the sulphur compounds (sulphides to sulfoxides and sulfones) followed by the extraction of the oxidation products These two process steps can be performed under mild conditions, using aqueous hydrogen peroxide as oxidant. Satisfactory results have been obtained employing biphasic systems together with suitable catalysts . The development of an adequate reaction process and the synthesis and selection of the catalyst are decisive parameters in order to perform an efficient ODS route.…”

Section: Figurementioning

confidence: 99%

Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

et al. 2019

View full text Add to dashboard Cite

The porous material UiO‐66 is one of the most stable MOFs, retaining its properties under a relatively wide range of chemical and physical conditions, making it attractive for post‐synthetic modifications and catalytic applications. A Titanium functionalization of UiO‐66 has been carried out and the synthesized material has been efficiently used as catalyst in the continuous oxidative desulfurization of a model fuel with aqueous H2O2. Using dibenzothiophene as sulfur source, only a partial desulfurization has been achieved, nevertheless the functionalized MOF showed better performances compared to the standard UiO‐66. The titanium containing MOF allowed to completely removing thioanisole from the oil phase within only eight minutes. The pore sizes of UiO‐66 are playing an important role in allowing a fast oxidation of the thioanisole compared to dibenzothiophene.

show abstract

Section: Figurementioning

confidence: 99%

Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

et al. 2019

View full text Add to dashboard Cite

show abstract

“…To address this issue some typical examples shall be discussed shortly at this point: A Janus‐type, cobalt‐based material has e. g. been designed as catalyst for the electro‐splitting of water . Other groups have investigated applications as acid‐base bifunctional catalysts, for ultra‐deep desulfurization reactions, for dye degradation, for aqueous hydrogenation reactions, and as micro‐ and nanomotors . Several methods have been developed and reviewed for the synthesis of Janus‐type materials as well as Janus microspheres/capsules…”

Section: Introductionmentioning

confidence: 99%

“…However, this method suffers from the fact that by changing the ratio of the substrates, the desired morphology of the material is destroyed . Moreover, some of the starting materials are not commercially available ,. The same protocol was employed for the synthesis of a heteropolyacid‐based Janus‐type material for application in catalytic oxidative desulfurization reactions …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Janus Interphase Organic‐Inorganic Hybrid Materials: Novel Water‐Friendly Heterogeneous Catalysts

et al. 2019

View full text Add to dashboard Cite

In this work, amphiphilic silica‐based Janus‐type acid and base catalysts are introduced as heterogeneous analogues of surfactants. The new interphase organic‐inorganic hybrid catalysts comprise of two different groups (−C8H17, −C2H4Ph) on the hydrophobic and two different groups (−C3H6SO3H, −C3H6NH2) on the hydrophilic side. The hydrophobic sides of the catalysts are responsible for the diffusion of the organic substrates to the catalytically active sites while the hydrophilic sides carry catalytic centers being oriented towards the aqueous phase and thus providing sufficient connection between water (solvent) and the organic substrates. Catalyst preparation is based on simple synthetic procedures and leads in a first step to hollow silica spheres with hydrophobic groups on the inner and hydrophilic groups on the outer surface. After crushing the hollow spheres, acid resp. base functionalized Janus nano‐sheets are obtained. The basic catalyst was tested for the Knoevenagel condensation of a series of benzaldehydes with malononitrile in water, while the acid catalyst was used for Fischer esterification of acetic acid with ethanol.

show abstract

“…In the ODS system, thiophene compounds and their aromatic derivatives are oxidized to corresponding sulfones or sulfoxides by suitable oxidants, and the polar products are subsequently removed by extraction or adsorption . Hydrogen peroxide has been widely used as the oxidant in various ODS systems, becoming the most popular oxidant due to its low cost and environmental friendliness . However, the thermal instability of hydrogen peroxide may cause operational hazards when stored in bulk quantities, thus limiting its large‐scale application in industry .…”

Section: Introductionmentioning

confidence: 99%

Ultradeep desulfurization of model oil through the oxidative adsorption process using Dawson‐type polyoxometalates and graphene oxide multifunctional composites

Dou

Wang

2019

Applied Organom Chemis

View full text Add to dashboard Cite

Eight Dawson-type polyoxometalates were successfully prepared and used in an octanal/air oxidative desulfurization (ODS) system for model oil. Among which, the classical 2:18 polyoxometalate K 6 [α-P 2 W 18 O 62 ]·14H 2 O exhibited the best catalytic performance with a sulfur removal ratio of 99.63%. Then, K 6 [α-P 2 W 18 O 62 ]·14H 2 O was supported on graphene oxide (GO) to afford K 6 P 2 W 18 O 62 /GO using the hydrothermal method. Due to the in situ adsorption of the supported catalysts in the ODS process, the sulfur removal ratio was 96.10% without extraction treatment. Compared with the octanal/air ODS system using pure GO as an adsorbent for the oxidation products, the sulfur removal ratio increased from 89.21 to 96.10%, and the n-octanal/S molar ratio decreased from 24 to 4. To facilitate the recycling of the catalyst and avoid catalyst loss, K 6 [α-P 2 W 18 O 62 ]·14H 2 O was supported on magnetic graphene oxide (mGO) to afford K 6 P 2 W 18 O 62 /mGO. The results showed that the supported catalyst could be easily recovered with the aid of an external magnetic field, while maintaining high catalytic activity during five cycles of reuse with little catalyst loss. Furthermore, all the prepared materials were analyzed by a series of characterizations, and the reaction mechanism of the studied system was proposed through contrast tests and GC-MS characterization analysis.

show abstract

Catalytic Emulsion Based on Janus Nanosheets for Ultra‐Deep Desulfurization

Cited by 41 publications

References 66 publications

Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

Janus Interphase Organic‐Inorganic Hybrid Materials: Novel Water‐Friendly Heterogeneous Catalysts

Ultradeep desulfurization of model oil through the oxidative adsorption process using Dawson‐type polyoxometalates and graphene oxide multifunctional composites

Contact Info

Product

Resources

About