Kinetic of Lignin Degradation Using Catalytic Pyrolysis

• Main Authors: Damayanti, 丹瑪亞
• Other Authors: Ho Shing Wu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/3kx45p

碩士 === 元智大學 === 化學工程與材料科學學系 === 106 === Catalytic pyrolysis process is promising method to degrade lignin in the absence of oxygen. This study used spent catalyst to degrade lignin using slow and fast catalytic pyrolysis method. The operation factors such as kind of catalyst, heating rate, reaction temperature, catalytic life time, kind of lignin and weight ratio of catalyst to lignin were investigated to achieve an optimal reaction condition. The degradation kinetic and thermal behavior of alkaline and dealkaline lignin with or without catalyst were investigated using thermogravimetric analysis and derivative thermogravimetry. The apparent activation energies of alkaline lignin degradation with and without catalyst were 128 kJ/mol and 143 kJ/mol, respectively. The activation energies of dealkaline lignin with and without catalyst were 124 kJ/mol and 133 kJ/mol, respectively. The catalytic pyrolysis of lignin was conducted in a 3L-batch reactor. The yield of liquid, gas and solid of product of depolymerization lignin using fast catalytic pyrolysis were 25.4%, 25.2 % and 49.3 % respectively, with ratio of lignin to spent catalyst (1:4). For slow catalytic pyrolysis with temperature up to 300 oC, those were 11.1%, 19.5% and 69.5%, respectively.