CO2 Adsorption Behavior of Graphite Oxide Modified with Tetraethylenepentamine

• DOI: 10.1021/acs.jced.7b00824
• Publication Date: 2017-12-26T18:29:39Z
• Authors: Yi Zhang; Yuan Chi; Changzhong Zhao; Yu Liu; Yuechao Zhao; Lanlan Jiang; Yongchen Song
• Keywords: Graphite oxide; Carbon fibers

Adsorption with solid sorbents is one of the most promising options for carbon dioxide (CO2) capture. In this study, we developed novel adsorbents graphite oxide (GO) modified by tetraethylenepentamine (TEPA). Samples were prepared raw TEPA/GO ratios 3, 5, 10, and 50 wt %, which referred to as 50% aminated (AGO), respectively. The CO2 capture capacities different AGO samples investigated at 25, 40, 70, 90 °C over a wide range pressures (0.1–5 MPa) using high-pressure volumetric analyzer. With increasing pressure, excess adsorbed amounts both pristine GO increased significantly, peak near 3 MPa followed sequential decrease. addition, temperature amount TEPA loaded on surface markedly affected adsorption capacity. 5% showed adsorptivity better than that sample, while 10 exhibited worse performance. Furthermore, samples, capacity was improved 70 in comparison suggesting these are appropriate temperatures