Preparation of ZSM-5 zeolite coatings within capillary microchannels

Truter, L.A.; Nijhuis, T.A.; Schouten, J.C.

doi:10.1039/c2jm31707a

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…The OH groups are observed in the range of 3200–3900 cm –1 . Assignments are consistent with the result reported in the literature. , Thus, surface grown can be assumed that carboxyl groups of TBTC 3– bond with hydroxyl groups by hydrogen bonding on the support surface before the growth of compound 1 (Figure ). In fact, alumina itself presents a high affinity for carboxylic groups. , Besides, to pre-activate substrate as well as to cool the growth solution slowly would enhance secondary bonding, such as hydrogen bonding or van der Waals interactions formed …”

Section: Resultssupporting

confidence: 90%

In Situ Growth of Metal–Organic Framework Thin Films with Gas Sensing and Molecule Storage Properties

Gao

Liu

et al. 2013

Langmuir

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New porous metal-organic framework (MOF) films based on the flexible ligand 1,3,5-tris[4-(carboxyphenyl)oxamethyl]-2,4,6-trimethylbenzene (H3TBTC) were fabricated on α-Al2O3 substrates under solvent thermal conditions. The factors affecting the fabrication of films, such as the temperature of pre-activation and the dosage of the reagents, were investigated. Tuning the subtle factors on film fabrications, a series of MOF thin films with different morphologies and grain sizes were prepared. The morphology and grain size of the films are monitored by scanning electron microscopy (SEM). X-ray diffraction (XRD) and attenuated total reflection infrared (ATR-IR) were also used to characterize the MOF films. The results indicate that the temperature of pre-activation and the dosage of the reagents are the key parameters during the process of film formation. The properties of the films, especially the sensing and sorption behavior, have been studied by an optical digital cameral and ultraviolet-visible (UV-vis) spectra. The evidence shows that the films are sensitive to small organic molecules, such as methanol and pyridine. Meanwhile, the films can adsorb small dye molecules. Thus, the films may have potential applications in either organic vapor sensing or storage of small dye molecules.

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Section: Resultssupporting

confidence: 90%

In Situ Growth of Metal–Organic Framework Thin Films with Gas Sensing and Molecule Storage Properties

Gao

Liu

et al. 2013

Langmuir

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“…Here, we report a novel HZSM‐5 catalytic film of nanosheet on the stainless plate (SP). First, nanosheet zeolite film was prepared by in situ synthesis method using C 22 H 45 N + (CH 3 ) 2 C 6 H 12 N + (CH 3 ) 2 C 6 H 13 (Br −1 ) 2 as structure direction agent (see Supporting Information, Part 1) . It was interesting to find that nanosheet films of MFI‐type crystalline phases (as characterized by XRD in Supporting Information Figure S1a) was synthesized according to diffraction peaks at 2θ from 7 to 10° and from 22 to 25°, but only randomly aggregates with flower‐like structures scattered on the SP surface (see the SEM images in Supporting Information Figure S1b), which did not become better after many attempts of changing the synthesis conditions parameters.…”

Section: Methodsmentioning

confidence: 99%

Controllable fabrication and catalytic performance of nanosheet HZSM‐5 films by vertical secondary growth

et al. 2018

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Significance Nanosheet HZSM-5 film vertically grown on the substrate with the tailorable macro-and meso-pores between the layers of nanosheets is hydrothermally synthesized by seed-assisted secondary growth method. The asprepared nanosheet HZSM-5 film exhibits reaction rate enhancement up to 312% in catalytic cracking of n-dodecane as well as twice light olefins selectivity, ascribed to the better mass transfer of reactants in the hierarchical porous structure and the ultra-thin b-axis pores of nanosheets. a Si/Al ratio measured by ICP. b d c : thickness of the zeolite films counted from cross-view SEM images. c m c : zeolite loadings (mg) per surface area (cm 2 ). d m l : zeolite film mass loss after ultrasonic vibration (200W) for 30min. e r d 5 (X 0 -X t )/X 0 3 100%, X 0 and X t are the n-dodecane conversion at time of 10 and 60 min. f X5 Dw/w 0 3 100%, where w 0 and Dw are the mass of n-dodecane fed and consumed at time of 10 min. g r i 5 (w 0 -w t510 )/(m c 3 t) 3 100% (%), w 0 is the mass of n-dodecane fed, w t 5 10 is the mass of n-dodecane in the products at reaction time of 10 min, m c is the mass of catalyst in the coating, t is the reaction time (10 min).

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“…Second, the microchannel and peripheral components are combined into a microreactor system by microprocessing technology. 21 Yeung 22 , 23 and Zhang 24 , 25 had carried out the research on the design and reaction performance of zeolite membrane assembled microreactors such as Zeolite Socony Mobil-5 (ZSM-5), Sil-1, NaX/NaA, and NaY/NaA in stainless steel microchannel. These zeolite membrane microchannel reactors were used in the condensation of benzaldehyde and ethyl-cyanoacetate, and the conversion was significantly higher than the traditional fixed-bed reactor.…”

Section: Introductionmentioning

confidence: 99%

“…First, the uniform and continuous high-crystallinity zeolite membrane has to be prepared by static secondary hydrothermal growth on the inner surface of open microchannel. Second, the microchannel and peripheral components are combined into a microreactor system by microprocessing technology . Yeung , and Zhang , had carried out the research on the design and reaction performance of zeolite membrane assembled microreactors such as Zeolite Socony Mobil-5 (ZSM-5), Sil-1, NaX/NaA, and NaY/NaA in stainless steel microchannel.…”

Section: Introductionmentioning

confidence: 99%

Continuous Flow Synthesis of a ZSM-5 Film in Capillary Microchannel for Efficient Production of Solketal

Huang

Zhang

et al. 2020

ACS Omega

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This work presented the microfluidic preparation of zeolite film in a capillary microchannel with different length-to-diameter ratios. In the quartz capillary with an inner diameter of 0.53 and 0.32 mm, Zeolite Socony Mobil-5 (ZSM-5) film was prepared by a continuous flow hydrothermal method. Considering the chemically inert surface of quartz capillary and the difficulty of preparing uniform and continuous zeolite film by conventional static synthesis, the ZSM-5 seed layer was precoated as active sites to induce film growth. The parameters of length-to-diameter ratio, seed coating, feed flow rate, and synthesis time were investigated. It revealed that the crystallinity of the ZSM-5 film was significantly affected by the capillary length-to-diameter ratio and seed coating in this flow system. The film morphology and thickness could be precisely controlled by adjusting the feed flow rate and synthesis time. This hydrogen form of the ZSM-5 (HZSM-5) film capillary microreactor was applied in the ketalization reaction of glycerol with acetone to produce solketal. The single-pass yield of solketal could reach ∼30% under mild conditions. This work provided a convenient stratagem of preparing zeolite catalytic coating or other support coatings in closed microchannels with a high length-to-diameter ratio and the potential application in valuable transformation of biomass glycerol.

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Preparation of ZSM-5 zeolite coatings within capillary microchannels

Cited by 13 publications

References 24 publications

In Situ Growth of Metal–Organic Framework Thin Films with Gas Sensing and Molecule Storage Properties

In Situ Growth of Metal–Organic Framework Thin Films with Gas Sensing and Molecule Storage Properties

Controllable fabrication and catalytic performance of nanosheet HZSM‐5 films by vertical secondary growth

Continuous Flow Synthesis of a ZSM-5 Film in Capillary Microchannel for Efficient Production of Solketal

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