Investigation of room temperature hydrogen storage in biomass derived activated carbon

Samantaray, Sai Smruti; Mangisetti, Sandhya Rani; Ramaprabhu, Sundara

doi:10.1016/j.jallcom.2019.03.110

Cited by 60 publications

(52 citation statements)

References 35 publications

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“…Nevertheless, not only the weight of the adsorbent but that of the whole system must be taken into account in the DOE target and, therefore, a hydrogen capacity well above 5.5 wt.% should be reached if only the adsorbent is considered. As a result, the DOE target remains difficult to reach at room temperature [31], although hydrogen storage capacities can be improved by doping with metal nanoparticles or heteroatoms [32,33].…”

Section: Introductionmentioning

confidence: 99%

Application of the modified Dubinin-Astakhov equation for a better understanding of high-pressure hydrogen adsorption on activated carbons

Sdanghi

Schaefer

Maranzana

et al. 2020

International Journal of Hydrogen Energy

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Hydrogen storage in activated carbons (ACs) has proven to be a realistic alternative to compression and liquefaction. Adsorption capacities up to 5.8 wt.% have indeed been obtained. The amount of adsorbed hydrogen depends on the textural properties of ACs, such as specific surface area and total pore volume. The modified Dubinin-Astakhov (MDA) equation proved to be a good analytical tool for describing hydrogen adsorption in a wide range of pressures and temperatures and for several adsorbents. The parameters of this model have been found to be somehow related to the textural properties of the adsorbent. Thus, we applied this model to understand better hydrogen adsorption on ACs over a wide range of pressures in relation to the textural properties of the ACs. We applied the MDA equation to evaluate also the isosteric heat of hydrogen adsorption, which was found to be in the range of 5 to 9 kJ mol-1. We compared the results obtained by applying the MDA equation with those obtained by both the sorption isosteric method and the Sips equation. This allowed finding the temperature dependence of the isosteric heat of adsorption, as well as its variation with respect to the textural properties of the ACs.

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Section: Introductionmentioning

confidence: 99%

Application of the modified Dubinin-Astakhov equation for a better understanding of high-pressure hydrogen adsorption on activated carbons

Sdanghi

Schaefer

Maranzana

et al. 2020

International Journal of Hydrogen Energy

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“…[1][2][3][4] They have been widely researched in various elds of high-performance solar cells, lithium-ion, supercapacitors, water splitting, and gas adsorptions/storages. [5][6][7][8][9] Among all the extensively studied carbon-based nanomaterials, graphene (G) rst reported in 2004 is composed of the uniform ring of six carbon atoms in a layered structure, making it exhibit an advantage of ultra-high surface area and be a promising candidate for the storage of gas molecules. 10,11 However, many investigations have reported that the pure graphene-based material only interacted with the adsorbed gas molecules through weak physical adsorption due to the sp 2 hybridizing of carbon atoms.…”

Section: Introductionmentioning

confidence: 99%

“…[19][20][21] According to the recent reports, one of those effective ways to store hydrogen energy is to design the solid-state material to store the gas in molecules, which has been widely reported in the modied graphene-based sheets. 9,22,23 The theoretical and experimental studies of Yang et al showed that the hydrogen storage capacity of the microporous carbon-based material could be signicantly enhanced by modied with Ru due to the spillover effect. 24 Fan and his workmates have also done a rst-principles study on the hydrogen storage properties of the Sc-decorated graphene.…”

Section: Introductionmentioning

confidence: 99%

Enhanced hydrogen storage performance of graphene nanoflakes doped with Cr atoms: a DFT study

Xiang

Yang

et al. 2019

RSC Adv.

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“…There are three main types of hydrogen storage materials that are currently of concern: adsorption hydrogen storage materials (such as activated carbon, mesoporous silica, metal-organic frameworks, etc.) [4,5,6,7], nanostructured hydrogen storage materials (such as carbon nanotubes, fullerene, functionalized adsorption material and nanosized complex hydrides, etc.) [8,9,10,11,12,13,14,15] and coordination hydride hydrogen storage materials (such as LiBH 4 , NaAlH 4 , Mg(NH 2 ) 2 , etc.)…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

Zhu

et al. 2019

Molecules

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A detailed analysis of the dehydrogenation mechanism of LiBH4/xLiAlH4 (x = 0.5, 1, 2) composites was performed by thermogravimetry (TG), differential scanning calorimetry (DSC), mass spectral analysis (MS), powder X-ray diffraction (XRD) and scanning electronic microscopy (SEM), along with kinetic investigations using a Sievert-type apparatus. The results show that the dehydrogenation pathway of LiBH4/xLiAlH4 had a four-step character. The experimental dehydrogenation amount did not reach the theoretical expectations, because the products such as AlB2 and LiAl formed a passivation layer on the surface of Al and the dehydrogenation reactions associated with Al could not be sufficiently carried out. Kinetic investigations discovered a nonlinear relationship between the activation energy (Ea) of dehydrogenation reactions associated with Al and the ratio x, indicating that the Ea was determined both by the concentration of Al produced by the decomposition of LiAlH4 and the amount of free surface of it. Therefore, the amount of effective contact surface of Al is the rate-determining factor for the overall dehydrogenation of the LiBH4/xLiAlH4 composites.

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Investigation of room temperature hydrogen storage in biomass derived activated carbon

Cited by 60 publications

References 35 publications

Application of the modified Dubinin-Astakhov equation for a better understanding of high-pressure hydrogen adsorption on activated carbons

Application of the modified Dubinin-Astakhov equation for a better understanding of high-pressure hydrogen adsorption on activated carbons

Enhanced hydrogen storage performance of graphene nanoflakes doped with Cr atoms: a DFT study

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

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