Magnesium oxide modified nitrogen-doped porous carbon composite as an efficient candidate for high pressure carbon dioxide capture and methane storage

Ghosh, Sreetama; Sarathi, R.; Ramaprabhu, Sundara

doi:10.1016/j.jcis.2018.12.063

Cited by 37 publications

(12 citation statements)

References 53 publications

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“…The position and relative intensity of the maximum diffraction are in good agreement with the literature for structures of type ZIF-8. − The characteristic peak at 2θ = 7.5° is associated with the plane (011) of ZIF-8, as well as the peak at 11.5°, which is associated with the plane (002), 12.5° associated with the plane (022), and 15.0° associated with the plane (013), as reported by Wee et al These characteristics indicate the high crystallinity of ZIF-8 synthesized, in which no impurities were detected.…”

Section: Resultssupporting

confidence: 88%

“…The determination of the adsorption isotherms for high-pressure CH 4 gases by the isosteric method was carried out using the volumetric analysis method in the high-pressure adsorption Unit-399 (HPAU-399, Eurotechnica, Bargteheide, Germany, HPAUnit) based on Sievert’s method, which has been frequently used for sorption studies of other gases such as CO 2 and H 2 at a high pressure, as widely reported in the literature . Sievert’s technique is characterized as a robust, simple, precise, and reliable method. , On the other hand, Figure shows the schematic representation of the equipment (see Figure ). For details on the operation of this equipment, see the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

“…77 Sievert's technique is characterized as a robust, simple, precise, and reliable method. 77,78 On the other hand, Figure 2 shows the schematic representation of the equipment (see Figure 2). For details on the operation of this equipment, see the Supporting Information.…”

Section: ■ Introductionmentioning

confidence: 99%

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Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Moreno–Piraján

Giraldo

2020

J. Chem. Eng. Data

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In this investigation, adsorption heats were determined using a direct method (adsorption calorimetry, Ad-Cal) and an indirect method (in which adsorption isotherms are measured at different levels of pressure and temperature) that makes use of thermodynamics, using the Clausius–Clapeyron (CC) equation, which is able to evaluate the isosteric heat. The results obtained from the two methods were compared determining the adsorption of CH4 on five normal structures of metal–organic frameworks (MOFs) synthesized in this investigation: zeolitic imidazolate framework (ZIF)-8, Hong Kong University of Science and Technology (HKUST)-1, isoreticular MOF (IRMOF)-1, MOF-177, and MgMOF-74, with the intention of establishing the similarities and differences between these methods. The experimental results of adsorption heats were fit at models: Dubinin–Astakhov (DA), and Toth, Unilan modified to determine the extent of each of the methods used in this analysis. This research has found a good agreement between the measured heat using the calorimetric method and model DA throughout the load range of CH4. Also, this study found that the model fits the least data obtained by adsorption calorimetry. The adsorption capacity of CH4 was also analyzed.

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Section: Resultssupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

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Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Moreno–Piraján

Giraldo

2020

J. Chem. Eng. Data

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“…The maximum number of training epochs was 100000 and the performance goal was 0.001 . We totally collected 1138 data points of CO 2 uptake ,− and 314 data points of N 2 uptake ,,− in various porous carbons. In general, these are pure carbons without polar surface functionalities (such as N).…”

Section: Methodsmentioning

confidence: 99%

Insights into CO₂/N₂ Selectivity in Porous Carbons from Deep Learning

Wang

Zhang

Dai

et al. 2019

ACS Materials Lett.

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Porous carbons are an important class of porous material for carbon capture. The textural properties of porous carbons greatly influence their CO2 adsorption capacities. But it is still unclear what features are most conductive to achieving high CO2/N2 selectivity. Here, we trained deep neural networks from the experimental data of CO2 and N2 uptakes in porous carbons based on textural features of micropore volume, mesopore volume, and BET surface area. We then used the model to screen porous carbons and to predict CO2 and N2 uptakes, as well as CO2/N2 selectivity. We found that the highest CO2/N2 selectivity can be achieved not at the regions of highest CO2 uptake but at the regions of lowest N2 uptake where mesopores disrupt N2 adsorption. This insight will help guide experiments to synthesize better porous carbons for post-combustion CO2 capture.

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“…[25] Two peaks can be obtained at 284.8 and 290.0 eV by fitting the C1s spectra for BMC ( Figure 4C), which belong to C C and CO 3 2− , respectively. [26] However, a new peak is observed at 286.4 eV in Ti 4000 -BMC ( Figure 4D), which is assigned to C O resulting from the organic segments of Ti 4000 . As shown in Figure 4E,F, two peaks can be obtained at 1304.2 and 1306.0 eV by fitting the Mg1s spectra, which belong to MgCO 3 and Mg(OH) 2 , respectively.…”

Section: Xps Analysismentioning

confidence: 98%

Effects of polyether titanate coupling agent on the flame retardancy and mechanical properties of soft poly(vinyl chloride)/basic magnesium carbonate composites

Dang

et al. 2020

Polymer Composites

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In this paper, a new polyether titanate coupling agent (Ti4000) was used to modify basic magnesium carbonate (BMC), and Ti4000 modified BMC (Ti4000‐BMC) was characterized by X‐ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and X‐ray photoelectron spectroscopy. Then, PVC composites were prepared by adding BMC or Ti4000‐BMC into soft PVC matrix via melt blending, and their flame retardancy was examined by limiting oxygen index (LOI), UL‐94 test, and cone calorimeter test. The results show that BMC can effectively improve flame resistance and suppress smoke production of pure soft PVC. As a result, the LOI is increased from 23.9% for pure soft PVC to 29.2% for Ti4000‐BMC/PVC composite with 50 phr Ti4000‐BMC (50%Ti4000‐BMC/PVC), and the composite passes the V0 rating in UL‐94 test, the peak heat release rate, total heat release, peak smoke production rate, and total smoke production are decreased from 343.10 kW/m2, 94.50 MJ/m2, 0.17 m2/s, and 27.20 m2/kg for pure soft PVC to 234.20 kW/m2, 70.20 MJ/m2, 0.02 m2/s, and 2.30 m2/kg for 50%Ti4000‐BMC/PVC composite, respectively. The analysis of char residues suggests that Ti4000‐BMC/PVC composites form the most compact char layer structure, indicating that the soft PVC composites show better char forming ability. In addition, the yield strength is increased from 4.4 MPa for pure soft PVC to 12.9 MPa for 50%Ti4000‐BMC/PVC composite, with an increase of 193.2%, and it shows good reinforcement effect on the soft PVC matrix.

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Magnesium oxide modified nitrogen-doped porous carbon composite as an efficient candidate for high pressure carbon dioxide capture and methane storage

Cited by 37 publications

References 53 publications

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Insights into CO₂/N₂ Selectivity in Porous Carbons from Deep Learning

Effects of polyether titanate coupling agent on the flame retardancy and mechanical properties of soft poly(vinyl chloride)/basic magnesium carbonate composites

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Magnesium oxide modified nitrogen-doped porous carbon composite as an efficient candidate for high pressure carbon dioxide capture and methane storage

Cited by 37 publications

References 53 publications

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH4-MOFs

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH4-MOFs

Insights into CO2/N2 Selectivity in Porous Carbons from Deep Learning

Effects of polyether titanate coupling agent on the flame retardancy and mechanical properties of soft poly(vinyl chloride)/basic magnesium carbonate composites

Contact Info

Product

Resources

About

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Heat of Adsorption: A Comparative Study between the Experimental Determination and Theoretical Models Using the System CH₄-MOFs

Insights into CO₂/N₂ Selectivity in Porous Carbons from Deep Learning