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首页> 外文期刊>RSC Advances >Preparation and CO2 adsorption properties of porous carbon from camphor leaves by hydrothermal carbonization and sequential potassium hydroxide activation
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Preparation and CO2 adsorption properties of porous carbon from camphor leaves by hydrothermal carbonization and sequential potassium hydroxide activation

机译：水热碳化和氢氧化钾顺序活化制备香樟叶多孔碳及其对CO 2 的吸附性能

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In this work, porous carbon was prepared from camphor leaves (CLs) by hydrothermal carbonization (HTC) and sequential potassium hydroxide activation. The morphology, porous structure, chemical properties, and CO2 capture capacity of the produced materials were investigated. The influence of HTC temperature on the material structure and capture capacity was studied. HTC temperature was found to have a major effect on the structure of the products and their CO2 capture capacity. The porous carbon obtained under HTC temperature of 240?°C exhibits a high ratio of microporosity, a large specific surface area (up to 1633.71 m2 g?1) and a maximum CO2 adsorption capacity of 6.63 mmol g?1 at 25 °C under 0.4 MPa. The Langmuir isotherm model depicts the equilibrium data much better than the Freundlich isotherm model. The pseudo-first-order kinetic model describes the kinetic data better than the pseudo-second-order kinetic model. Our results demonstrate that the porous adsorbents prepared from CLs provide a feasible option for CO2 capture with low cost, environmental friendship and high capture capability.
机译：在这项工作中，通过热液碳化（HTC）和顺序的氢氧化钾活化作用，从樟脑叶（CL）制备了多孔碳。研究了所制备材料的形貌，多孔结构，化学性质和CO 2 捕获能力。研究了HTC温度对材料结构和捕获能力的影响。发现HTC温度对产物的结构及其对CO 2 的捕获能力有重要影响。在240℃的HTC温度下获得的多孔碳具有较高的微孔率，较大的比表面积（高达1633.71 m 2 g ？1 ），最大CO 2 吸附容量为6.63 mmol g ？1 <在25℃和0.4 MPa下。 Langmuir等温线模型比Freundlich等温线模型更好地描述了平衡数据。拟一级动力学模型比拟二级动力学模型更好地描述了动力学数据。我们的结果表明，用CLs制备的多孔吸附剂为CO 2 的低成本，环境友好和高捕获能力提供了可行的选择。

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