Enhancing carbon production by Ni-Fe catalyst during waste plastic gasification

• Main Authors: Chun-Wei Cheng, 鄭雋威
• Other Authors: Ming-Yen Wey
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/59596702789458642057

碩士 === 國立中興大學 === 環境工程學系所 === 102 === With the development of society, people create a lot of plastic products for life convenience. In addition, plastics are not easily decomposed which resulted the problem of plastic wastes treatments. In order to reduce and recycle plastic wastes effectively, this study use bed-additives to catalyze the gasification of plastic wastes to form carbon materials in a fluidized bed reactor. The efficiencies of plastic wastes gasification at 500°C with different bed- additives were evaluated. The results indicated that both Ni and Fe catalysts could enhance the ability of carbon production in the gasification system. The XRD results showed that the main diffraction peak (2θ=26.5°) of reacted catalyst was carbon. When using Al2O3 as support, Fe/Al2O3 had higher capacity for carbon production than Ni/Al2O3. For SiO2 catalysts, 3 wt.% Fe/SiO2 had the highest activity than other SiO2 catalysts in this study. Besides, Ni/Al2O3 significantly enhance hydrogen production ability due to better metal dispersion and higher specific surface area. In conclusion, adding small amount bed-additives which prepared by impregnation method could promote the ability of carbon production during plastic wastes gasification.