Experimental Research on the Production of Hydrogen-Rich Synthesis Gas via the Air-Gasification of Olive Pomace: A Comparison between an Updraft Bubbling Bed and a Downdraft Fixed Bed

被引:2
作者
Carmo-Calado, Luis [1 ,2 ]
Hermoso-Orzaez, Manuel Jesus [3 ]
Diaz-Perete, Daniel [3 ]
La Cal-Herrera, Jose [4 ]
Brito, Paulo [1 ,2 ]
Terrados-Cepeda, Julio [3 ]
机构
[1] Polytech Inst Portalegre, P-7300110 Portalegre, Portugal
[2] Polytech Inst Portalegre, Sch Technol & Management, VALORIZA, P-7300555 Portalegre, Portugal
[3] Univ Jaen, Dept Graph Engn Design & Projects, Jaen 23071, Spain
[4] Univ Jaen, Dept Business Org Mkt & Sociol, Jaen 23071, Spain
来源
HYDROGEN | 2023年 / 4卷 / 04期
关键词
gasification; residual biomass; bubbling fluidized bed; fixed bed; H-2-rich syngas; CHEMICAL LOOPING GASIFICATION; BIOMASS COMPONENTS; WASTE; CHAR; TEMPERATURE; CONVERSION; PARTICLES; PYROLYSIS; GASIFIER; REACTOR;
D O I
10.3390/hydrogen4040046
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present study compares the performance of bubbling-bed updraft and a fixed-bed downdraft gasification systems for producing hydrogen-rich (H-2) syngas from olive pomace on a semi-industrial scale. The focus is on examining the effects of temperature and efficiency ratio (ER) on the composition, low heat value (LHV), carbon conversion efficiency (CCE), and cold gas efficiency (CGE) of the produced syngas. The results presented for the fixed bed show the concentration of H-2 (15.6-16.52%), CGE (58.99-66.80%), CCE (69.07-71.86%), and LHV (4.82-5.70 MJ/Nm(3)). The CGE reaches a maximum of 66.80% at a temperature of 700 degrees C and an ER of 0.20, while the syngas yield (2.35 Nm(3)/kg) presents a maximum at a temperature 800 degrees C and an ER of 0.21, with a tendency to decrease with the increase in the temperature. For the bubbling fluidized bed, results were shown for the concentration of H-2 (12.54-12.97%), CGE (70.48-89.51%), CCE (75.83-78.49%), and LHV (6.10-6.93 MJ/Nm(3)), where, at a temperature of 700 degrees C and an ER of 0.23, the CGE is 89.51% and the LHV is 6.93 MJ/Nm(3), with a tendency to decrease with the increase in the temperature, while the maximum syngas yield (2.52 Nm(3)/kg) occurs at a temperature of 800 degrees C and an ER of 0.23. Comparing the two gasification processes, the fixed bed has a higher concentration of H-2 at all the temperatures and ERs of the experiments; however, the bubbling fluidized bed has a higher CGE. These findings have implications for applications involving syngas, such as energy production and chemical synthesis, and can guide process optimization and enhance energy efficiency. The information obtained can also contribute to emission mitigation strategies and improvements in syngas-based synthesis reactors
引用
收藏
页码:726 / 745
页数:20
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