Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks

Mounfield, William P.; Claure, Micaela Taborga; Agrawal, Pradeep; Jones, Christopher W.; Walton, Krista S.

doi:10.1021/acs.iecr.6b01045

Cited by 24 publications

(14 citation statements)

References 59 publications

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“…We note that the preparation methods used here for UiO-66 type materials are very different from methods reported elsewhere. UiO-66 and UiO-66-NH2 were obtained by direct synthesis in a spray-dryer, whereas they were prepared using conventional batch processes in the relevant literature [17][21] [20]. Also, UiO-66-COOH was prepared in water here, rather than in DMF as for Joshi et al [22].…”

Section: Experimental Set-upmentioning

confidence: 99%

Unravelling ammonia adsorption mechanisms of adsorbents in humid conditions

Khabzina

Farrusseng

2018

Microporous and Mesoporous Materials

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Air purification of ammonia, a toxic industrial chemicals (TICs), by adsorption process on Metal-Organic Framework solids is attracting high scientific and commercial interests. While active carbon based adsorbents required high level of relative humidity for achieving proper performance ammonia capture, zeolite performance degrades in presence of humidity. For MOFs, the presence of humidity has been shown to be MOF dependent, either beneficial or detrimental. It appears that the role of humidity is of key importance and that different ammonia adsorption mechanisms co-exist depending on the material's physico-chemical features. Based on a screening of various microporous adsorbents including carbons, zeolites and MOFs, we show that in the presence of humidity, the ammonia uptake

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Section: Experimental Set-upmentioning

confidence: 99%

Unravelling ammonia adsorption mechanisms of adsorbents in humid conditions

Khabzina

Farrusseng

2018

Microporous and Mesoporous Materials

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“…MOFs are a relatively new class of inorganic–organic hybrid materials, which have tremendously attracted interest due to their potential applications in gas storage and adsorption 22,23 , molecular separation 24,25 , fluorescence 26,27 , and sensors 28,29 . Moreover, MOFs have aroused interest in heterogeneous catalysis owing to their high surface areas, uniform pores, and chemical tunability 30,31 .…”

Section: Introductionmentioning

confidence: 99%

Anchorage of Au3+ into Modified Isoreticular Metal–Organic Framework-3 as a Heterogeneous Catalyst for the Synthesis of Propargylamines

Liu

Tai

Zhou

et al. 2017

Sci Rep

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Postsynthetic modification of metal-organic framework is a general and practical approach to access MOF-based catalysts bearing multiple active sites. The isoreticular metal–organic framework-3 (IRMOF-3) was modified with lactic acid through condensation reaction of the carboxyl group of lactic acid and amino group present in IRMOF-3 frameworks. Au3+ was subsequently anchored onto the metal–organic framework IRMOF-3 using postsynthetic modification. The synthezized IRMOF-3-LA-Au (LA = lactic acid) was characterized by powder X-ray diffraction, N2 adsorption-desorption, infrared spectroscopy, liquid-state nuclear magnetic resonance, thermogravimetric analysis, H2-temperature programmed reduction, transmission electro microscopy, and inductively coupled plasma–optical emission spectrometry. IRMOF-3-LA-Au acted as an efficient heterogeneous catalyst in the synthesis of propargylamines by three-component coupling reaction of aldehyde, alkyne, and amine. Moreover, the catalyst is applicable to various substituted substrates, including aromatic and aliphatic aldehydes, alkyl- and aryl-substituted terminal alkynes, and alicyclic amines. In addition, the catalyst can be easily separated from the mixture and can be reused for four consecutive cycles.

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“…Additionally, it has been proved that the meixnerite has Brønsted basicity [49], which is different from the Lewis basicity of calcined HT. Thus, the formation of meixnerite can adjust the acid-base properties of the catalyst and improve its coke resistance [50,51]. However, it is difficult to evaluate the acid-base properties by conventional methods because of the influence of deposited coke on the formed meixnerite [50,51].…”

Section: Xrdmentioning

confidence: 99%

“…Thus, the formation of meixnerite can adjust the acid-base properties of the catalyst and improve its coke resistance [50,51]. However, it is difficult to evaluate the acid-base properties by conventional methods because of the influence of deposited coke on the formed meixnerite [50,51]. As compared with the diffraction strength of meixnerite, the only direct evidence is that the diffraction strength of graphite and the amount of deposited coke (see TG analysis below) show an opposite trend in accordance with the order from H 2 /N 2 -to C 3 H 8 /H 2 /N 2 -and C 3 H 8 -reduced catalysts.…”

Section: Xrdmentioning

confidence: 99%

Effect of Reduction Atmosphere on Structure and Catalytic Performance of PtIn/Mg(Al)O/ZnO for Propane Dehydrogenation

et al. 2020

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The effect of reduction atmospheres, H2/N2, C3H8/H2/N2, C3H8 and CO, on the structure and propane direct dehydrogenation performance of PtIn/Mg(Al)O/ZnO catalyst derived from ZnO-supported PtIn-hydrotalcite was studied. The physicochemical properties of the as-prepared and used catalytic system were characterized by various characterization methods. The results show that the dehydrogenation performance, especially the stability of the PtIn/Mg(Al)O/ZnO catalyst, was significantly improved along with the change in reduction atmosphere. The highest catalytic activity (51% of propane conversion and 97% propylene selectivity), resistance toward coke deposition, and stability for more than 30 h were achieved with the H2/N2-reduced catalyst. The optimal dehydrogenation performance and coke resistance are mainly related to the high Pt dispersion and In0/In3+ molar ratio, strong Pt–In interaction and small metal particle size, depending on the nature of the reduction atmospheres. The reconstruction of meixnerite favors the stability and coke resistance to some extent.

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Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks

Cited by 24 publications

References 59 publications

Unravelling ammonia adsorption mechanisms of adsorbents in humid conditions

Unravelling ammonia adsorption mechanisms of adsorbents in humid conditions

Anchorage of Au3+ into Modified Isoreticular Metal–Organic Framework-3 as a Heterogeneous Catalyst for the Synthesis of Propargylamines

Effect of Reduction Atmosphere on Structure and Catalytic Performance of PtIn/Mg(Al)O/ZnO for Propane Dehydrogenation

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