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The role of H3PO4 in the preparation of activated carbon from NaOH-treated rice husk residue

机译：H3PO4在用NaOH处理过的稻壳残渣制备活性炭中的作用

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摘要

The preparation of activated carbon from rice husk residue using H3PO4 as activation agent was studied. The samples were characterized by elemental analysis, N-2 adsorption-desorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), temperature programmed decomposition-mass spectra (TPD-MS), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The role of H3PO4 in the activation process was discussed. A maximum surface area of 1016 m(2) g(-1) was obtained under the optimized conditions, that is, a base treated solid material to H3PO4 mass ratio of 1 : 2, an activation temperature of 500 degrees C and an activation time of 1 h. H3PO4 might act as a catalyst which facilitates the release of CO2, an oxidant which reacts with carbon after dehydration, and a reagent which enters AC through C-O-P bonds.
机译：研究了以H3PO4为活化剂从稻壳残渣中制备活性炭的方法。通过元素分析，N-2吸附-解吸，扫描电子显微镜（SEM），X射线衍射（XRD），傅里叶变换红外光谱（FT-IR），程序升温分解质谱（TPD-MS）对样品进行表征），热重分析（TGA）和X射线光电子能谱（XPS）。讨论了H3PO4在激活过程中的作用。在优化的条件下获得的最大表面积为1016 m（2）g（-1），即碱处理的固体材料与H3PO4的质量比为1：2，活化温度为500摄氏度，活化时间为1小时H3PO4可能充当促进CO2释放的催化剂，在脱水后与碳反应的氧化剂以及通过C-O-P键进入AC的试剂。

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