Structural Effects and Interactions of Carbon Dioxide Molecules Adsorbed on Ni, Zn, and Cd Nitroprussides

Roque‐Malherbe, R.; Uwakweh, O. N. C.; Lozano, C.; Polanco, R.; Hernández‐Maldonado, Arturo J.; Fierro, P.; Lugo, F.; Primera-Pedrozo, José N.

doi:10.1021/jp205104r

Cited by 15 publications

(16 citation statements)

References 55 publications

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“…Thereafter, with the relation: q iso (0.37) = 1.16 E were calculated the isosteric heat of adsorption ( Table 5). The results reported indicated that the tested modified zeolites shows similar values for the measured isosteric heat of adsorption; but greater than those value of the isosteric heat of adsorption reported also in the present paper for the ZSM-5 zeolite, also larger than those reported for a particle packing silica and a dealuminated Y zeolite (DAY) [34], Cd, Zn and Ni-nitroprussides [41] and Cu-nitroprusside [40] and a Ni-MOF [39] (Table 6), as well bigger than experimental isosteric adsorption heats measured for the adsorption carbon dioxide on MCM-41- [58], silicalite [59], Na clinoptilolite and K-clinoptilolite [60], Na-A [61] and Na-X and MOF-5 [62] and MOF-508b [63], but similar to measured isosteric heats of adsorption for the adsorption of carbon dioxide on sodium ferrerite (Na-FER) [64]. The previously described adsorption data indicated that the interaction of the carbon dioxide molecule with the modified zeolites is strong.…”

Section: Resultscontrasting

confidence: 45%

“…This detector is based on a Bruker AXS compound silicon strip technology and increases measured intensities, without sacrificing resolution and peak shape. This together with the use of small scanning step resulted in high quality XRD profiles suitable for mathematical treatment [39][40][41].…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Further, was studied the surface chemistry of the modified clinoptilolites and the interaction of carbon dioxide with the framework of the modified clinoptilolites, two synthetic ZSM-5 zeolites used for comparison and data previously obtained for the adsorption of carbon dioxide in amorphous silica and a dealuminated Y zeolite [34], a metal organic framework [39], and four nitroprussides [40,41] by applying diffuse reflectance Fourier transform infrared spectrometry (DRIFTS) and adsorption measurements with the help of an automatic adsorption analyzer. Finally an appropriate theoretical methodology for the analysis of the X-ray diffraction profiles and the adsorption data was applied [5,34,[39][40][41].…”

Section: Introductionmentioning

confidence: 99%

“…Finally an appropriate theoretical methodology for the analysis of the X-ray diffraction profiles and the adsorption data was applied [5,34,[39][40][41]. As far as we know the modification of clinoptilolite with HFSi to improve their adsorption properties had not been previously attempted.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Adsorption Space of Modified Clinoptilolites

Rolando¹,

Roque-Malherbe²,

Alba³

et al. 2013

JMSE-B

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Carbon dioxide (CO 2 ) adsorption is an important adsorbent characterization method and a significant industrial process. In separation and recovery technology, the adsorption of the CO 2 is important to reduce the concentration of this gas considered as one of the greenhouse gases. Natural zeolites, particularly clinoptilolite, are widely applied as adsorbents. In this regard, in the present research, the structure, composition and morphology of modified with hexafluorosilicate (HFSi) and orthophosphoric acid (H 3 PO 4 ) clinoptilolites were investigated by characterizations and measurements made with, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDAX) and gravimetric adsorption. Additionally, the surface Chemistry of the modified clinoptilolites was analyzed by applying diffuse reflectance fourier transform infrared spectrometry (DRIFTS). Further, the interaction of CO 2 within the adsorption space of these modified clinoptilolites and a synthetic ZSM-5 zeolite was studied with the help of adsorption measurements. After all, an appropriate theoretical methodology for the analysis of the XRD and adsorption data was applied. The calculated cell parameters of the tested are similar to those reported for a typical clinoptilolite of: a = 17.662 Ǻ, b = 17.911 Ǻ, c = 7.407 Ǻ and β = 116.40 The resolution of the TGA derivative profiles indicated the presence of two steps for water release, one of them represents the loss of majority of the water present in the micropores. This was evidenced as a broad peak centered at about 50 0 C for the CSW-HFSi-0.1, but at 100 °C for the samples CSW-HFSi-0.4. The SEM micrographs corresponding to the modified clinoptilolites, was evidenced that the CSW zeolite shows secondary particles exhibiting diameters from 3 to 40 μm, formed by primary clinoptilolite crystallites showing a crystallite size, Φ = 40 nm. The EDAX elemental analysis it can be demonstrated that the exchange process replaced about 85% of the charge compensating ions. The DRIFT spectra of the modified clinoptilolites, specifically, CSW-HFSi-0.1, show a narrow band at about: 3,740 cm -l corresponding to terminal silanol groups (Si-OH) and a band 3,600-3,650 cm -1 resulting from extra-framework Al-OH. With the precision of the measured micropore volumes related to the excellent fitting of the adsorption data by the D-R isotherm equation, it can be affirm that carbon adsorption took only place in the micropore region. The isosteric heat of adsorption calculated for the modified clinoptilolites was greater than those values reported of ZSM-5 zeolite, particle packing silica, dealuminated Y zeolite (DAY) Cd, Zn and Ni-nitroprussides and Cu-nitroprusside and a Ni-MOF. With the obtained result it can be concluded that the modified clinoptilolites with HFSi showed a quality as adsorbent comparable to commercial synthetic zeolites.

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Section: Resultscontrasting

confidence: 45%

Section: Characterization Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of the Adsorption Space of Modified Clinoptilolites

Rolando¹,

Roque-Malherbe²,

Alba³

et al. 2013

JMSE-B

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“…The appearances of these two platinum species were as expected because of the use of Pt complex as a precursor. 38 The TGA prole of the Pt/Y/V and Pt/Y catalysts and the Na-Y zeolite are exhibited in Fig. 37 In Fig.…”

Section: Morphology and Structure Of The Catalystsmentioning

confidence: 99%

Rotating disk slurry electrodeposition of platinum at Y-zeolite/carbon Vulcan XC-72R for methanol oxidation in alkaline media

et al. 2015

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Platinum was electrodeposited onto Y-zeolite and Y-zeolite (Y)/Vulcan XC-72R (V) to produce Pt/Y/V and Pt/Y catalysts using a rotating disk slurry electrode technique. The activities of the two catalysts were measured towards methanol electro-oxidation in alkaline media by cyclic voltammetry and chronoamperometry. The materials were examined using electron microscopy. The results were compared to those obtained on commercial catalysts. Pt/Y/V (with 14 wt% Pt) catalyst was the most active, even more so than a commercial Pt/V catalyst with 20 wt% Pt. The Pt/Y/V catalysts contained Pt nanoparticles and tetrahedra, likely a consequence of the nucleation and growth within the zeolite framework.

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Electrostatically Driven Selective Adsorption of Carbon Dioxide over Acetylene in an Ultramicroporous Material

Xie

Cui

et al. 2021

Angewandte Chemie

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Separating acetylene from carbon dioxide is important but highly challenging owing to their similar physical properties and molecular dimensions. Herein, we report highly efficient electrostatically driven CO2/C2H2 separation in an ultramicroporous cadmium nitroprusside (Cd‐NP) with compact pore space and complementary electrostatic potential well fitting for CO2, thus enabling molecular quadrupole moment recognition of CO2 over C2H2. This material shows a high CO2/C2H2 uptake ratio of 6.0 as well as remarkable CO2/C2H2 selectivity of 85 under ambient conditions with modest CO2 heat of adsorption. Neutron powder diffraction experiments and molecular simulations revealed that the electrostatic potential compatibility between pore structure and CO2 allows it to be trapped in a head‐on orientation towards the Cd center, whereas the diffusion of C2H2 is electrostatically forbidden. Dynamic breakthrough experiments have validated the separation performance of this compound for CO2/C2H2 separation.

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Structural Effects and Interactions of Carbon Dioxide Molecules Adsorbed on Ni, Zn, and Cd Nitroprussides

Cited by 15 publications

References 55 publications

Study of the Adsorption Space of Modified Clinoptilolites

Study of the Adsorption Space of Modified Clinoptilolites

Rotating disk slurry electrodeposition of platinum at Y-zeolite/carbon Vulcan XC-72R for methanol oxidation in alkaline media

Electrostatically Driven Selective Adsorption of Carbon Dioxide over Acetylene in an Ultramicroporous Material

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