Preparation of CO2 sorbents by recycling of biomass wastes

• Main Authors: Yi-Yang Huang, 黃翊彥
• Other Authors: Shou-Heng Liu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/rbq9ej

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 103 === The greenhouse effect is a global issue that human beings should face to. The main gas of greenhouse gases is CO2, which the largest sources of CO2 emissions origin from coal-fired power plants. A preliminary analysis from US DOE indicated that an economically feasible approach for CO2 from a stationary source should further cost-down to less than US $30. In this work, to develop cost-down technologies, we used the solid sorbents which from biomass wastes and synthesized by calcination and hydrothermal, followed by nitrogen-doping by aniline, APTES and melamine. The materials were chemically activated using potassium hydroxide to increase surface area. A variety of different spectroscopic and analytical techniques, such as Brunauer-Emmet-Teller analysis (BET), ultrahigh resolution scanning electron microscope (SEM), elemental analysis (EA), thermo gravimetric analyzer (TGA) were used to characterize the physicochemical properties of various materials. The CO2 sorption performance was also carried out under different simulated conditions (temperature and concentration). Furthermore, we tested the stability and selectivity of sorbents by measuring CO2 adsorption–desorption cycles and selectivity of CO2 and N2. Results obtained from this study revealed that KMHP which nitrogen-doped by melamine from HP, followed by chemical activation, has a high surface area (1335 m2/g) and CO2 uptake of 2.8 and 1.8 mmol/g at 35 and 50℃. In addition, the solid sorbents have good selectivity for CO2-N2 separation and a fast CO2 adsorption rate, which may be suitable for use in capture CO2 from coal-fired power plant.