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Amine-Functionalized Graphene for Natural Gas Sweetening

机译：胺官能化石墨烯用于天然气甜味

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Natural gas is often contaminated with acid gases; commonly hydrogen sulfide (H_2S) andcarbon dioxide (CO2). In addition to their offensive odor and high toxicity, acid gases can cause serious corrosion problems in a gas plant due to their acidic nature and may reduce the efficiency of gas treatment processes. Therefore, several natural gas sweetening processes have been developed for the removal of acid gases. In present work, we report the employment of amine-functionalized graphene hybrid for adsorption of acid gases. Graphene was selected as a solid sorbent due to its very high specific surface area and ability to undergo various chemical transformations.Considering high affinity of amines towards H_2S, an animated polymer, polyethylenimine (PEI) was used as a functionalizing agent. The resulting hybrids were characterized using Fourier Transform Infrared spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), elemental analysis, X-ray Diffraction analysis (XRD), and Thermogravimetric Analysis (TGA). These hybrids are envisioned as materials with high H_2S sorption capacities and hold great promise in natural gas sweetening applications.
机译：天然气常被酸气体污染;通常硫化氢（H_2S）和二氧化碳（CO2）。除了令人攻击的气味和高毒性外，酸性气体由于其酸性性质而导致煤气厂的严重腐蚀问题，并且可以降低气体处理过程的效率。因此，已经开发了几种天然气甜味方法来除去酸性气体。在目前的工作中，我们报告了胺官能化石墨烯杂种用于吸附酸性气体。由于其非常高的比表面积和经历各种化学转化的能力，选择了石墨烯作为固体吸附剂。使用胺的高亲和力朝向H_2S，动画聚合物，聚乙烯亚胺（PEI）用作官能化试剂。使用傅里叶变换红外光谱（FTIR），X射线光电子能谱（XPS），元素分析，X射线衍射分析（XRD）和热重分析（TGA），表征得到的杂种。这些杂种被设想为具有高H_2S吸附能力的材料，并在天然气加质应用中保持良好的承诺。

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