Adsorption and Diffusion of Hydrogen in Carbon Honeycomb

Qin, Qin; Sun, Tingwei; Wang, Hanxiao; Brault, Pascal; An, Haojie; Xie, Lu; Peng, Qing

doi:10.3390/nano10020344

Cited by 12 publications

(8 citation statements)

References 48 publications

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“…Therefore, wastewaters containing this type of dyes were highlighted as one of the most important threatening factors in environmental and public health [2,5]. Different studies have reported that there are several methods for removing dyes from textile wastewaters, including the application of photodecomposition [6], electrolysis [7,8], adsorption [9][10][11][12][13][14][15][16][17][18], oxidation [19], biodegradation [20], combined sonochemical and adsorption [21], coagulation-flocculation [22,23], etc.…”

Section: Introductionmentioning

confidence: 99%

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

et al. 2020

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In the current work, neodymium oxide (Nd2O3) nanoparticles were synthesized and characterized by means of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The major aim/investigation of this research was to fit/model and optimize the removal of Acid Blue 92 (AB92) dye from synthetic effluents (aqueous solutions) using the adsorption process based on neodymium oxide (Nd2O3) nanoparticles. To optimize the adsorption conditions, central composite design (CCD) based on response surface methodology (RSM) was applied. The effects of pH (3–9), adsorbent dosage (0.1–1 g/L), initial concentration of AB92 (100–300 mg/L), and contact time (10–100 min) on the adsorption process were investigated. Apart from equilibrium and kinetic experiments, thermodynamic evaluation of the adsorption process was also undertaken. The adsorption process was found to have the best fitting to Langmuir isotherm model and pseudo-second-order kinetic equation. Also, the process was found to be spontaneous and favorable with increased temperature. The optimal conditions found were: pH = 3.15, AB92 concentration equal to 138.5 mg/L, dosage of nanoadsorbent equal to 0.83 g/L, and 50 min as contact time, which resulted in 90.70% AB92 removal. High values for the coefficient of determination, R2 (0.9596) and adjusted R2 (0.9220) indicated that the removal of AB92 dye using adsorption can be explained and modeled by RSM. The Fisher’s F-value (25.4683) denotes that the developed model was significant for AB92 adsorption at a 95% confidence level.

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Section: Introductionmentioning

confidence: 99%

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

et al. 2020

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“…[7][8][9][10] Among all hydrogen storage materials, metal hydride hydrogen storage systems are thought to be preferential choices for meeting the requirements of mobile facilities. 11 The application goal has been achieved by some reported hydrogen storage materials. What is more, some AB 2 -type and other alloys appear regularly in daily life.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage behavior of nanocrystalline and amorphous Mg–Ni–Cu–La alloys

et al. 2020

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“…Recent numerical simulation by GCMC carried out by Qin et al [138] have shown that it is possible to reach 4.5 wt.% of hydrogen uptake at 77 K and 2 MPa with a carbon nanomaterial having…”

Section: Other Carbon Materialsmentioning

confidence: 99%

“…Recent numerical simulation by GCMC carried out by Qin et al [138] have shown that it is possible to reach 4.5 wt.% of hydrogen uptake at 77 K and 2 MPa with a carbon nanomaterial having a honeycomb structure. Li et al [139] obtained excess uptakes in the range 4.70-5.94 wt.% at 77 K and 2 MPa using polyacrylonitrile-based porous carbons with high A BET , between 2565 and 3049 m 2 g −1 .…”

Section: Other Carbon Materialsmentioning

confidence: 99%

Characterization of Carbon Materials for Hydrogen Storage and Compression

Sdanghi

Canevesi

Celzard

et al. 2020

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Carbon materials have proven to be a suitable choice for hydrogen storage and, recently, for hydrogen compression. Their developed textural properties, such as large surface area and high microporosity, are essential features for hydrogen adsorption. In this work, we first review recent advances in the physisorption characterization of nanoporous carbon materials. Among them, approaches based on the density functional theory are considered now standard methods for obtaining a reliable assessment of the pore size distribution (PSD) over the whole range from narrow micropores to mesopores. Both a high surface area and ultramicropores (pore width < 0.7 nm) are needed to achieve significant hydrogen adsorption at pressures below 1 MPa and 77 K. However, due to the wide PSD typical of activated carbons, it follows from an extensive literature review that pressures above 3 MP are needed to reach maximum excess uptakes in the range of ca. 7 wt.%. Finally, we present the adsorption–desorption compression technology, allowing hydrogen to be compressed at 70 MPa by cooling/heating cycles between 77 and 298 K, and being an alternative to mechanical compressors. The cyclic, thermally driven hydrogen compression might open a new scenario within the vast field of hydrogen applications.

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Adsorption and Diffusion of Hydrogen in Carbon Honeycomb

Cited by 12 publications

References 48 publications

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Hydrogen storage behavior of nanocrystalline and amorphous Mg–Ni–Cu–La alloys

Characterization of Carbon Materials for Hydrogen Storage and Compression

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