Hydrogen adsorption with micro-structure deformation in nanoporous carbon under ultra-high pressure

Li, Heng; Komatsu, Keiji; Tsuda, Yusuke; Saitoh, Hidetoshi

doi:10.1016/j.ijhydene.2022.08.030

Cited by 9 publications

(3 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these isotherms, the maximum volumetric uptakes of Li 2.5 /AC-1 and Li 2.5 /AC-2 were found to be 20.1 and 33.2 g/L, respectively. Although these values are less compared to those for zeolite-templated carbons, strategies such as cold isostatic pressing into pellets 61 or printing monoliths 62 with less microstructure deformation can effectively increase their packing density and result in achieving the targeted volumetric uptake.…”

Section: General Textural Characterization Of Adsorbentsmentioning

confidence: 99%

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Murugavel,

Rownaghi,

Rezaei

2023

Energy Fuels

View full text Add to dashboard Cite

With increasing energy demand and fast-paced decarbonization methods adopted to curb the adverse effects of greenhouse gas emissions, hydrogen (H2) is considered a sustainable, clean, and potential renewable energy carrier for the future. To substitute the energy needs required for the physical methods of H2 storage, adsorbed gas storage (AGS) is the next viable option that provides the opportunity to adsorb and desorb gases under mild conditions. In this work, we studied the effect of light alkali metal functionalization comprising Li and K on the H2 storage performance of porous graphitic carbon adsorbents. The effect of metal doping on the enthalpy of adsorption and the enhancement of H2 uptake were systematically investigated. The results showed an enhancement in the gravimetric uptake up to 2.8 wt % at room temperature and 100 bar pressure for Li-doped carbon at 2.5 wt % of Li metal loading through the enhanced electrostatic interactions. The isosteric heat of adsorption increased from 8.3 to 11.7 kJ/mol, suggesting that the dispersed alkali cations in the form of alkoxide (O–Li) species act as active centers capable of anchoring H2 molecules through electrostatic charge-quadrupole and charge-induced dipole interactions. Furthermore, the Li intercalation was found to increase the interlayer distance from 3.87 to 4.09 Å. The findings of this study demonstrate that the Li-doped carbon at 2.5 wt % loading exhibits superior H2 storage performance compared to other alkali metal-doped carbon analogues.

show abstract

Section: General Textural Characterization Of Adsorbentsmentioning

confidence: 99%

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Murugavel,

Rownaghi,

Rezaei

2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…27,28 Considering physisorption, the optimum pore sizes of nanoporous carbons for hydrogen adsorption were in the range of 1.1-1.6 nm. 45,46 The latter corresponds to the pore size distribution of HCS-CS-10% Ni, in which most pores have a diameter of ∼1.0 nm (Fig. 2(D)).…”

Section: Samplesmentioning

confidence: 99%

Chitosan-assisted hydrogen adsorption and reversibility of Ni-doped hierarchical carbon scaffolds

Plerdsranoy,

Thaweelap,

Chirachanchai

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…However, given that packing density plays a crucial role in overall volumetric uptake, achieving a balance between porosity and bulk density is essential to meet DOE target metrics on both gravimetric and volumetric bases. Despite the inherently low bulk density of aerogels, techniques such as pressure compaction, 20 hydrothermal pressing, 59 and CIP 53 into pellets, and direct ink writing (DIW) into monolith formation, 60 with minimal microstructural deformation, can effectively enhance the packing density of these highly porous carbons.…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

Engineering Microstructure of Ultraporous Carbon Aerogels as Advanced H₂ Sorbent Carriers

Murugavel,

Rownaghi,

Rezaei

2024

Chem. Mater.

View full text Add to dashboard Cite

In the face of urgent global challenges such as climate change, escalating energy demands, and security concerns, the shift toward sustainable and low-carbon energy is imperative. Hydrogen (H 2 ), recognized as a versatile and clean energy carrier, holds significant promise as a key facilitator in achieving these objectives. However, H 2 encounters challenges in becoming a reliable energy carrier due to issues related to energy density, ease of storage, and compatibility with existing infrastructure. This paper presents a comprehensive investigation of microstructure engineering in high surface area carbon aerogels to enhance H 2 uptake, addressing a pivotal aspect of H 2 storage applications. We report engineering microstructure of ultramicroporous carbon aerogels via sol−gel and CO 2 supercritical drying methods, as potential H 2 sorbent carriers. Microstructural analysis via N 2 , Ar, and CO 2 physisorption measurements revealed that the alteration of microstructure in carbon aerogels through controlled pyrolysis, activation, and pore-forming techniques facilitated the formation of ultramicropores with favorable confinement effects which enhanced intermolecular interactions across the pore walls toward efficient H 2 adsorption. The carbon aerogels, regardless of activation methods, exhibited elevated surface areas between 2970 and 3200 m 2 /g and pore volumes in the range of 0.7−1.39 cm 3 /g, with a microporous surface area ranging from 950 to 2610 m 2 /g. Notably, the double-activated carbon aerogel (CA T20-F25-KOH ) demonstrated the highest H 2 storage capacity of 2.1 wt % and 6.8 g/L under 298 K and 100 bar pressure. At cryogenic temperature (77 K) and 100 bar pressure, CA T20-F25-KOH achieved a H 2 storage capacities of 6.8 wt % and 28 g/L. These findings underscore the pivotal role of porosity and surface chemistry in carbon sorbents for H 2 storage.

show abstract

Hydrogen adsorption with micro-structure deformation in nanoporous carbon under ultra-high pressure

Cited by 9 publications

References 54 publications

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Chitosan-assisted hydrogen adsorption and reversibility of Ni-doped hierarchical carbon scaffolds

Engineering Microstructure of Ultraporous Carbon Aerogels as Advanced H₂ Sorbent Carriers

Contact Info

Product

Resources

About

Hydrogen adsorption with micro-structure deformation in nanoporous carbon under ultra-high pressure

Cited by 9 publications

References 54 publications

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Effect of Alkali Metal Functionalization on Hydrogen Storage Performance of Highly Porous Activated Carbons

Chitosan-assisted hydrogen adsorption and reversibility of Ni-doped hierarchical carbon scaffolds

Engineering Microstructure of Ultraporous Carbon Aerogels as Advanced H2 Sorbent Carriers

Contact Info

Product

Resources

About

Engineering Microstructure of Ultraporous Carbon Aerogels as Advanced H₂ Sorbent Carriers