Kinetic study and syngas production from pyrolysis of forestry waste. (1st March 2017)

• Record Type: Journal Article
• Authors: Hu, Mian; Wang, Xun; Chen, Jian; Yang, Ping; Liu, Cuixia; Xiao, Bo; Guo, Dabin
• Is Part Of: Energy conversion and management. Volume 135(2017)
• Page Start: 453
• Page End: 462
• Publication Date: 2017-03-01
• Subjects: Forestry waste -- Pyrolysis -- Kinetic -- Syngas; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2016.12.086
• Languages: English
• ISSNs: 0196-8904

Abstract

Graphical abstract: Highlights: Pyrolysis process can be divided into three stages using differential DTG method. A modified discrete DAEM model fitted experimental data well. Fe/biochar catalyst showed a good performance on catalytic reforming process. Abstract: Kinetic study and syngas production from pyrolysis of forestry waste (pine sawdust (PS)) were investigated using a thermogravimetric analyzer (TGA) and a fixed-bed reactor, respectively. In TGA, it was found that the pyrolysis of PS could be divided into three stages and stage II was the major mass reduction stage with mass loss of 73–74%. The discrete distributed activation energy model (DAEM) with discrete 200 first-order reactions was introduced to study the pyrolysis kinetic. The results indicated that the DAEM with 200 first-order reactions could approximate the pyrolysis process with an excellent fit between experimental and calculated data. The apparent activation energies of PS ranged from 147.86 kJ·mol −1 to 395.76 kJ·mol −1, with corresponding pre-exponential factors of 8.30 × 10 13 s −1 to 3.11 × 10 25 s −1 . In the fixed-bed reactor, char supported iron catalyst was prepared for tar cracking. Compared with no catalyst which the gas yield and tar yield were 0.58 N m 3 /kg biomass and 201.23 g/kg biomass, the gas yield was markedly increased to 1.02 N m 3 /kg biomass and the tar yield was decreased to only 26.37 g/kg biomass in the presence of char supported iron catalyst. These results indicated that char supported iron catalyst could potentially be used to catalytically decompose tar molecules in syngas generated via biomass pyrolysis.