Effects of compacting activated carbons on their volumetric CO2 adsorption performance

Li, Dawei; Wang, Yu; Zhang, Xiaoxiao; Jiaojiao, Zhou; Yang, Yonghong; Zhang, Zongbo; Ling, Wei; Tian, Yuanyu; Zhao, Xuebo

doi:10.1016/j.fuel.2019.116540

Cited by 16 publications

(4 citation statements)

References 36 publications

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“…The increase in packing density observed on compaction of the present activated carbon composites is consistent with previous reports on the compaction or densification of purely carbonaceous activated carbons. Increases in packing density above 20% have been observed when activated carbons are compacted at pressure of 399 MPa or 887 MPa, 56 or even at lower compaction pressure of 55 MPa. 57 Furthermore, the packing density of high surface area activated carbons (LMA726 and LMA738) has been reported to rise by more than 40% after compaction at 74 MPa.…”

Section: Resultsmentioning

confidence: 99%

Porous carbon composites as clean energy materials with extraordinary methane storage capacity

Alali,

Shehu,

Mokaya

2024

Energy Environ. Sci.

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Section: Resultsmentioning

confidence: 99%

Porous carbon composites as clean energy materials with extraordinary methane storage capacity

Alali,

Shehu,

Mokaya

2024

Energy Environ. Sci.

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“…There are different results when studied at different densities, therefore, density was not chosen to be more convincing for the characterization of the adsorption properties of CO 2 . As reported in the literature [ 62 ], the dynamic CO 2 adsorption performance of MA powder was investigated in a thermogravimetric analyzer (TGA Q500, TA Corp, New Castle, DE, USA). As shown in Figure 7 A,B, comparing the CO 2 adsorption properties measured by the presented CO 2 adsorption measurement technique and gravimetric adsorption, it was found that the adsorption amounts determined by these two methods were essentially the same, indicating that the presented adsorption measurement can be employed.…”

Section: Resultsmentioning

confidence: 99%

Study on the Synthesis of High-Purity γ-Phase Mesoporous Alumina with Excellent CO2 Adsorption Performance via a Simple Method Using Industrial Aluminum Oxide as Raw Material

Wang

Shen

et al. 2021

Materials

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To mitigate the global greenhouse effect and the waste of carbon dioxide, a chemical raw material, high-purity γ-phase mesoporous alumina (MA) with excellent CO2 adsorption performance was synthesized by the direct aging method and ammonium salt substitution method. With this process, not only can energy consumption and time be shortened to a large extent but the final waste can also be recycled to the mother liquor by adding calcium hydroxide. Reaction conditions, i.e., pH value, aging time, calcination temperature, and desodium agent, were investigated in detail with the aid of X-ray fluorescence spectrum (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) and Barret-Joyner-Hallender (BJH) methods, nonlocal density functional theory (NLDFT), transmission electron microscopy (TEM), temperature-programmed desorption of CO2 (CO2-TPD), and presented CO2 adsorption measurement. The results of this study are summarized as follows: the impurity content of the MA synthesized under optimal conditions is less than 0.01%, and its total removal rate of impurities is 99.299%. It was found that the MA adsorbent has a large specific surface area of 377.8 m2/g, pore volume of 0.55 cm3/g, and its average pore diameter is 3.1 nm. Under the condition of a gas flow rate of 20 cm3/min, its CO2 adsorption capacity is 1.58 mmol/g, and after 8 times of cyclic adsorption, the amount of CO2 adsorption remained basically unchanged, both of which indicate that the material has excellent adsorption properties and can be widely used for the adsorption of carbon dioxide.

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“…There has been very little work on the volumetric adsorption of CO 2 by ZIFs. However, the gravimetric capacity cannot represent the actual processing capacity of the adsorbent under specific working conditions. − …”

Section: Introductionmentioning

confidence: 99%

Large and Dense Block-like ZIF Aggregates with High Bulk Density for Enhancing Volumetric Adsorption Capacity

Wang,

Mu,

et al. 2024

Ind. Eng. Chem. Res.

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The bulk density and volumetric capacity are crucial indicators of an adsorbent in fixed-bed adsorption and separation operations. Herein, two types of CHA-ZIFs aggregates (CHA-ZIFs-H and CHA-ZIFs-L) with completely different morphologies were prepared by controlling the molar ratio of the mIm:RbIm (R = -Br/-Cl/-CH 3 ) mixed ligand in the synthesis solution. All large and dense block-like CHA-ZIFs-H exhibit higher bulk density than small rodlike or disc-shaped CHA-ZIFs-L. The experimental and molecular simulation results demonstrate that the difference in bulk density of CHA-ZIFs is closely related to the stacked void volume caused by their aggregate morphology (size and shape) rather than being related to the difference in their limited mixedlinker composition, pore structure, and skeletal density. All CHA-ZIFs-H exhibit enhanced volumetric CO 2 capacity compared to CHA-ZIFs-L. The CHA-ZIFs with a unique large-sized block morphology represent a new dimension of control over high bulk density and volumetric capacity.

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Effects of compacting activated carbons on their volumetric CO2 adsorption performance

Cited by 16 publications

References 36 publications

Porous carbon composites as clean energy materials with extraordinary methane storage capacity

Porous carbon composites as clean energy materials with extraordinary methane storage capacity

Study on the Synthesis of High-Purity γ-Phase Mesoporous Alumina with Excellent CO2 Adsorption Performance via a Simple Method Using Industrial Aluminum Oxide as Raw Material

Large and Dense Block-like ZIF Aggregates with High Bulk Density for Enhancing Volumetric Adsorption Capacity

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