Synthesis of calcium oxide from waste materials and its modification for a carbon dioxide adsorbent

• Main Authors: Fang-Yu Li, 李方裕
• Other Authors: Shuchen Hsieh
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/8u6883

碩士 === 國立中山大學 === 化學系研究所 === 107 === The impact of CO2 on climate change is becoming more serious, so CO2 reduction, storage and reuse are very important. Industrial CO2 production processes are usually in high temperature conditions, and CaO has excellent adsorption of CO2 in high temperature environments. Therefore, it is one of the trends to use CaO as a CO2 adsorbent. However, deterioration occurs after performing multiple cycles of adsorption under high temperature conditions, which is one of the disadvantages of CaO. In this study, the common waste eggshell was used as the raw material, and its main component was CaCO3, which was prepared into CaO after chemical treatment. The experiment was divided into two parts. The first part was to modify the surface of CaO with different surfactants and amino-containing polymer. The second part was modified by adding anti-sintered metal oxide. The materials use common waste materials: aluminum cans, scrap iron. Then, the characteristics were analyzed by FT-IR, XRD, SEM, BET, etc., and TGA was used to investigate the amount of CO2 adsorption. According to the results of the first part of the study, it was found that the CaO modified by the amino group-containing polymer had a significant increase in the amount of cyclic adsorption, and the effect of dopamine modification was the best; and from the second part, the addition of aluminum was used for modification. The CaO with the Al:Ca=1:5 has the best cyclic adsorption effect. This experiment uses wastes commonly found in daily life: eggshells, aluminum cans, scrap iron, etc. to synthesize and modify CaO to solve the problem of CO2 emissions, and the way to recycle and reuse waste. It also fully demonstrates the practice of green chemistry.