Efficient micropore sizes for carbon dioxide physisorption of pine cone-based carbonaceous materials at different temperatures

Kim, Choong-Hee; Lee, Sang Soo; Park, Soo‐Jin

doi:10.1016/j.jcou.2021.101770

Cited by 16 publications

(5 citation statements)

References 51 publications

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“…Many researchers demonstrated that the existence of a fine-tuned micropore, along with a high specific surface area and total micropore volume, plays a key role in improving the CO 2 adsorption capacity. 24,39 Similarly, our data reveal that the micropore volume is more closely related to the CO 2 adsorption capacity as shown in Fig. 6(c, d).…”

Section: Resultssupporting

confidence: 77%

“…Notably, the highest R 2 value of 0.99 is obtained for the correlation between the CO 2 adsorption capacity and a micropore volume of less than 0.73 nm at 298 K. Contrarily, the highest R 2 of 0.98 is observed for a micropore volume less than 1.1 nm at 273 K. These fitting results indicate that sub-micropores of sizes <0.73 nm and <1.1 nm play a deterministic role in improving the CO 2 adsorption capacity at 298 and 273 K, respectively. 17,39 These correlation results also suggest that the optimum pore sizes for CO 2 adsorption capacity vary depending on the adsorption temperature. In addition, smaller micropores are highly effective for CO 2 adsorption at lower temperatures because of the intensive adsorption capacity of small micropores, which strengthens the interaction between the adsorbent surface and the CO 2 molecules.…”

Section: Resultsmentioning

confidence: 73%

“…This feature can be attributed to the abundance of micropores with sizes in the range of 0.73–1.1 nm. 39…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Kim,

Lee,

Park

2024

Green Chem.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 73%

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Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Kim,

Lee,

Park

2024

Green Chem.

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“…Activated carbons (ACs) are another one of the promising candidates for hydrogen storage materials because of their high specific surface areas, chemical and mechanical stabilities, microporous structures, and low costs [107][108][109][110][111][112][113]. Zhou et al demonstrated that the hydrogen storage capacity is better for slit-type pores (ACs) than cylinder-type pores (CNTs) [114].…”

Section: Carbonaceous Materials For Hydrogen Storagementioning

confidence: 99%

Recent Progress Using Solid-State Materials for Hydrogen Storage: A Short Review

Lee

Kim

et al. 2022

Processes

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With the rapid growth in demand for effective and renewable energy, the hydrogen era has begun. To meet commercial requirements, efficient hydrogen storage techniques are required. So far, four techniques have been suggested for hydrogen storage: compressed storage, hydrogen liquefaction, chemical absorption, and physical adsorption. Currently, high-pressure compressed tanks are used in the industry; however, certain limitations such as high costs, safety concerns, undesirable amounts of occupied space, and low storage capacities are still challenges. Physical hydrogen adsorption is one of the most promising techniques; it uses porous adsorbents, which have material benefits such as low costs, high storage densities, and fast charging–discharging kinetics. During adsorption on material surfaces, hydrogen molecules weakly adsorb at the surface of adsorbents via long-range dispersion forces. The largest challenge in the hydrogen era is the development of progressive materials for efficient hydrogen storage. In designing efficient adsorbents, understanding interfacial interactions between hydrogen molecules and porous material surfaces is important. In this review, we briefly summarize a hydrogen storage technique based on US DOE classifications and examine hydrogen storage targets for feasible commercialization. We also address recent trends in the development of hydrogen storage materials. Lastly, we propose spillover mechanisms for efficient hydrogen storage using solid-state adsorbents.

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“…Carbon source as a precursor of ACs was a consideration factor for high specific surface area and excellent electrochemical performance. Various raw materials have been used as precursors to obtain ACs, including biomass, plants, and polymers [ 20 , 21 , 22 ]. Pitch, a by-product of coal cracking or crude oil distillation industry, is regarded as one of the most promising precursors for ACs because of its low-ash, high-carbon yields and easily graphitizable feature.…”

Section: Introductionmentioning

confidence: 99%

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

Kim

Lee

et al. 2022

Molecules

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Electric double-layer capacitors (EDLCs) are an excellent electrochemical energy storage system (ESS) because of their superior power density, faster charge–discharge ability, and longer cycle life compared to those of other EES systems. Activated carbons (ACs) have been mainly used as the electrode materials for EDLCs because of their high specific surface area, superior chemical stability, and low cost. Petroleum pitch (PP) is a graphitizable carbon that is a promising precursor for ACs because of its high carbon content, which is obtained as an abundant by-product during the distillation of petroleum. However, the processibility of PP is poor because of its stable structure. In this study, pre-oxidized PP-derived AC (OPP-AC) was prepared to investigate the effects of pre-oxidation on the electrochemical behaviors of PP. The specific surface area and pore size distribution of OPP-AC were lower and narrower, respectively, compared to the textural properties of untreated PP-derived AC (PP-AC). On the other hand, the specific capacitance of OPP-AC was 25% higher than that of PP-AC. These results revealed that pre-oxidation of PP induces a highly developed micropore structure of ACs, resulting in improved electrochemical performance.

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Efficient micropore sizes for carbon dioxide physisorption of pine cone-based carbonaceous materials at different temperatures

Cited by 16 publications

References 51 publications

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Recent Progress Using Solid-State Materials for Hydrogen Storage: A Short Review

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

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Efficient micropore sizes for carbon dioxide physisorption of pine cone-based carbonaceous materials at different temperatures

Cited by 16 publications

References 51 publications

Valorization of waste coffee grounds into microporous carbon materials for CO2 adsorption

Valorization of waste coffee grounds into microporous carbon materials for CO2 adsorption

Recent Progress Using Solid-State Materials for Hydrogen Storage: A Short Review

A Study on Pre-Oxidation of Petroleum Pitch-Based Activated Carbons for Electric Double-Layer Capacitors

Contact Info

Product

Resources

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Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption

Valorization of waste coffee grounds into microporous carbon materials for CO₂ adsorption