authors |
Pio, DT; Gomes, HGMF; Ruivo, LCM; Matos, MAA; Monteiro, JF; Frade, JR; Tarelho, LAC |
nationality |
International |
journal |
ENERGY |
author keywords |
Catalyst; Concrete; Biomass; Gasification; Bubbling fluidized bed |
keywords |
STEAM GASIFICATION; TAR ELIMINATION; CARBON-DIOXIDE; TEMPERATURE; WASTE; DECOMPOSITION; POWDER; CAO; CO2 |
abstract |
Concrete was evaluated as low-cost catalyst for in-situ application in an autothermal 80 kWth pilot-scale bubbling fluidized bed direct (air) biomass gasifier. To improve the understanding of the observed phenomena, the process was also evaluated in smaller-scale reactive system, namely an externally heated 3 kWth bench-scale bubbling fluidized bed. Concrete application showed promising results regarding the relative increase of H-2 concentration and H-2/CO molar ratio in the producer gas (up to 99.2 and 77.4%, respectively), indicating that this material can promote the water-gas shift reaction. However, this effect was dependent on the gas-solid contact time and catalyst temperature, being that it was only relevant when these parameters were at least 5.2 s and 746 degrees C, respectively. A maximum lower heating value of 7.5 MJ/Nm(3) of the producer gas was found with concrete application (23.8% relative increase), which is higher than commonly found in the liter-ature. Relative increases of up to 25.1, 55.3 and 47.0% for the specific dry gas production, cold gas effi-ciency and carbon conversion efficiency, respectively, were also found, consequently suggesting that, in addition to the promotion of the water-gas shift reaction, this material has potential to promote tar reforming/cracking and carbon gasification reactions. (C) 2021 Elsevier Ltd. All rights reserved. |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
issn |
0360-5442 |
isbn |
1873-6785 |
year published |
2021 |
volume |
233 |
digital object identifier (doi) |
10.1016/j.energy.2021.120931 |
web of science category |
13 |
subject category |
Thermodynamics; Energy & Fuels |
unique article identifier |
WOS:000681283600014
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
6.082 |
5 year journal impact factor |
6.046 |
category normalized journal impact factor percentile |
89.245 |
dimensions (citation analysis):
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altmetrics (social interaction):
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