Detecting pore size distribution of activated carbon by low-field nuclear magnetic resonance |
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| Authors: | Zhihong Zhao Bin Wang Rui Tan Wenjing Liu Minghui Zhang |
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| Institution: | College of Materials Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China |
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| Abstract: | In this study, the transverse relaxation time (T2) of activated carbon (AC) in different relative environment humidity was detected firstly by low-field nuclear magnetic resonance (LFNMR). The pore size (diameter) of AC distributions was calculated by the relationship between T2 and surface relaxation rate (ρ), where ρ was obtained by the detection of nine porous materials with known pore size. The results showed that the pore size distributions of AC calculated by ρ < 0.19 nm/ms were in good agreement with that obtained by nitrogen adsorption method and proved that LFNMR as a new detection method was feasible for characterizing AC pore size distribution. |
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| Keywords: | activated carbon NMR pore size |
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