Effect of exfoliation temperature on carbon dioxide capture of graphene nanoplates |
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Authors: | Long-Yue Meng Soo-Jin Park |
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Institution: | Korea CCS R&D Center, Korea Institute of Energy Research, 152 Gajeongro, Yuseoung-gu, Daejeon 305-343, South Korea; Department of Chemistry, Inha University, 100 Inharo, Nam-gu, Incheon 402-751, South Korea. |
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Abstract: | Thermally exfoliated graphene nanoplates were found to be a novel high efficiency sorbent for the capture of CO(2). The exfoliated graphene nanoplates were expanded successfully from graphite oxide by a low-heat treatment at temperatures ranging from 150 to 400°C under vacuum conditions. The texture was analyzed by N(2) full isotherms and XRD. The CO(2) capture characteristics of the graphene nanoplates at 25°C and 30bar were examined using a pressure-composition-temperature apparatus. The inter-layer spacing of the graphene layers and pore structure on the CO(2) capture capacities were studied as a function of the processing conditions. The prepared graphene nanoplates exhibited high capture capacities, up to 248wt.%, at 25°C and 30bar. The improved CO(2) capture capacity of the graphene nanoplates was attributed to the larger inter-layer spacing and higher interior void volume. |
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