Preparation of ultramicroporous volume carbon using high-speed ball-milling and its selective adsorption of CH4 in low-concentration coalbed methane

Reasonable design of adsorbents for separating and purifying CH 4 in coalbed methane is important to achieve sustainable development. However, KOH activation, the most widely used method for preparing activated-carbon adsorbents, requires the addition of a high proportion of KOH, which has disadvant...

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Vydáno v:Journal of materials science Ročník 57; číslo 13; s. 6914 - 6928
Hlavní autoři: Huang, Chen, Han, Meng, Zhang, Li, Dang, Wei, Luo, Lan, Shi, Yongyong, Yang, Chunliang, Wang, Meng, Pan, Hongyan, Lin, Qian
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York Springer US 01.04.2022
Springer Nature B.V
Témata:
Activated carbon
Adsorbents
Adsorption
Ball milling
Carbon
Characterization and Evaluation of Materials
Chemical Routes to Materials
Chemistry and Materials Science
Classical Mechanics
Coalbed methane
corrosion
Corrosion tests
Crystallography and Scattering Methods
Materials Science
Methane
Penetration
Performance evaluation
Polymer Sciences
Pore size
Pore size distribution
porosity
porous media
Potassium permanganate
Selective adsorption
Selectivity
Solid Mechanics
Sustainable development
ISSN:0022-2461, 1573-4803
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Shrnutí:Reasonable design of adsorbents for separating and purifying CH 4 in coalbed methane is important to achieve sustainable development. However, KOH activation, the most widely used method for preparing activated-carbon adsorbents, requires the addition of a high proportion of KOH, which has disadvantages such as high cost and corrosion. In this study, a low proportion of KOH/KMnO 4 is used as an activator and a mechanical ball-milling method is used to prepare cellulose-based microporous carbon for the selective adsorption of CH 4 in low-concentration coalbed methane. The prepared microporous carbon has a large ultramicropore volume and narrow pore size distribution. The V mic (<1 nm) of AC Q60 is 0.39 cm 3 /g, and the most probable pore size is 0.42 nm. At 273 K and 101.3 kPa, the CH 4 adsorption capacity of this sample is up to 3.22 mmol/g. Ideal adsorption solution theory simulations show that CH 4 /N 2 selectivity is 7.82. The AC Q60 regeneration adsorption performance was evaluated via a dynamic penetration experiment. After six cycles, the CH 4 penetration time difference was found to be minor. This study serves as a reference for the excellent performance of carbon materials with rich narrow microporous structures applied to the effective separation of CH 4 in low-concentration coalbed methane.
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ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-022-07078-y