sewage sludge char
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Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1983
Author(s):  
Rolandas Paulauskas ◽  
Kęstutis Zakarauskas ◽  
Nerijus Striūgas

Gasification is considered a clean and effective way to convert low quality biomass to higher value gas and solve various waste utilization problems as well. However, only 80% of biomass is converted through thermal processes. The remaining part is char, which requires more time for conversion and in that case reduces the efficiency of gasifier. Seeking to optimize the process of gasification, this work focuses on the intensification of residual char gasification in a gasifier. For this purpose, three different types of char prepared from wood, sewage sludge and tire were examined under different conditions in a lab-scale gasification setup. Results showed that the air flux increase from 0.11 kg/(m2s) to 0.32 kg/(m2s) intensified the gasification process and the gasification rate increased from 0.8 to 2.61 g/min with the decrease of duration of wood char gasification by 72%. An additional introduction of pyrolysis gas into the char gasifier led to decreased bed temperatures, but the gasification rate increased from 0.8 to 1.25 g/min and from 2.61 g/min to 2.83 g/min, respectively, for the wood char and the sewage sludge char. Moreover, the use of pyrolysis gas coupled with air as the gasifying agent enhanced the composition of produced gas from char, and the CO2 concentration decreased by 1.68 vol% while the H2 concentration increased by 2.8 vol%.


2020 ◽  
pp. 125201
Author(s):  
María Atienza-Martínez ◽  
Nurull Nadia Binti Suraini ◽  
Javier Ábrego ◽  
Isabel Fonts ◽  
Luisa Lázaro ◽  
...  

2020 ◽  
Vol 99 (9) ◽  
pp. 158-164
Author(s):  
Kazuhiro KUMABE ◽  
Kohki HATTORI ◽  
Masafumi CHISHIMA ◽  
Hiroshi MORITOMI

Chemosphere ◽  
2020 ◽  
Vol 251 ◽  
pp. 126330
Author(s):  
Hui Chen ◽  
Dezhen Chen ◽  
Yuyan Hu ◽  
Yuheng Feng ◽  
Xiaohu Dai

2017 ◽  
Vol 60 ◽  
pp. 201-210 ◽  
Author(s):  
Rosanna Kleemann ◽  
Jonathan Chenoweth ◽  
Roland Clift ◽  
Stephen Morse ◽  
Pete Pearce ◽  
...  

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