Thermogravimetric characteristics and pyrolysis kinetics of Giheung Respia sewage sludge

• Published in: The Korean journal of chemical engineering Vol. 27; no. 1; pp. 163 - 167
• Main Authors: Othman, Mohd Roslee, Park, Young-Hun, Ngo, Thanh An, Kim, Seung-Soo, Kim, Jinsoo, Lee, Kwang Seok
• Format: Journal Article
• Language: English
• Published: Boston Springer US 2010; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Materials Science; 화학공학; Pyrolysis; Sewage Sludge; Biomass; Conversion; TGA
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-009-0338-9

Sewage sludge acquired from Giheung Respia treatment facility was characterized and converted into gas, bio-oil and char by pyrolysis. The rate of conversion as a function of temperature was obtained from differential thermogravimetric analysis (DTG) for different heating rates. The activation energy calculated from data selected conversions shows that the activation energy decreased with increasing conversion up to 10%, steadily increased from 10 to 70%, and substantially increased from 70 to 90%. Depending on the level of conversion, the values of activation energies varied between 181 and 659 kJ/mol. The gas product obtained in the experiment at 450 °C, 20 min mainly included CO 2 (30%), CO (23%) and CH 4 (17%). The product yields of gas, oil and char were systematically studied by changing the pyrolysis temperature and residence time.