| Summary: | 碩士 === 明志科技大學 === 環境與資源工程研究所 === 101 === In this study, cattle manure and cattle manure compost were selected as the precursor for activated carbon. The precursors were immersed in ZnCl2, H3PO4, or NaOH, and heated at 400℃ to produce activated carbons. The produced carbons were then evaluated for their sorption capacity for carbon dioxide. The thermal stability of cattle manure and cattle manure compost precursors were first determined by thermogravimetric analyzer. The organic chemical compositions of activated carbon were analyzed by element analyzer. The surface area and pore structure were analyzed by surface area and porosity analyzer. The surface functional groups were determined by Fourier transform infrared spectroscopy. Finally, the sorption capacities for carbon dioxide by different activated carbon were determined by thermogravimetric analyzer. The results demonstrated that the cattle manure compost sample had greater thermal stability and hydrophobicity than the cattle manure sample. However, the activated carbons produced from cattle manure compost sample had much less sorption capacity for carbon dioxide, because compost sample had greater amount of ash content than that of cattle manure sample. Among the three activated carbons produced by different activation method, the H3PO4 activated carbon had largest surface area and pore structure, and thus had the best sorption capacities for carbon dioxide. In contrast, the NaOH activated carbon had the least surface area, the least nitrogen content, the highest ash content, and thus had poorest sorption capacities for carbon dioxide. Overall, the cattle manure activated carbon showed high nitrogen content and pore structure, and could be potential adsorbent for carbon dioxide removal.
|
|---|
