Valorization of banana residues via gasification coupled with electricity generation

Cardona, Sandra M.; Orozco, Laura M.; Gómez, Claudia L.; Solís, Wilson A.; Velásquez, Jorge A.; Ríos, Luis

doi:10.1016/j.seta.2021.101072

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…Gasification reactors can be classified into three types: fixed beds, fluidized beds, and entrain beds. , A fixed bed consists of three configurations: updraft, downdraft, and cross draft . Downdraft gasifiers are used the most for small power plants using internal combustion engines . However, there are some problems when low bulk density biomass is used as the feedstock .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, there are potential difficulties with ash fusion and the necessity to have feedstock with a moisture content less than 25%, and the ash discharge rate is another problem as well . Some of these disadvantages were solved by designing a horizontal reactor system, ,− which can be used with biomass feedstocks that contain moisture up to 30% and has the effective process for syngas production in the appropriate H 2 /CO ratio for further FT synthesis. However, the instability of temperature inside the reactor is still a problem; thus, this research attempts to supply the external heat source to control the temperature.…”

Section: Introductionmentioning

confidence: 99%

“…This research aims to investigate the use of rubber wood pellets (RWPs) and eucalyptus wood chips (EWCs) for biomass gasification in a pilot horizontal gasifier connected with tar removal using CaO as a tar-reforming catalyst. The gasifier, which was designed specifically for FT syngas production, was created in the horizontal rotary vessel, in which the shape was similar to the rotary kiln with a slight degree of inclination. ,, The advantages of this custom-built pilot horizontal gasification system allowed for the control of the H 2 /CO ratio in the required range of the downstream FT synthesis process. All equipment and operation procedures were designed to ensure that syngas production, which focused on the productivity and quality of produced syngas with high purity and high heating value in long-term operation, was conducted for at least 7 days for each operation sequence.…”

Section: Introductionmentioning

confidence: 99%

“… 11 Downdraft gasifiers are used the most for small power plants using internal combustion engines. 12 However, there are some problems when low bulk density biomass is used as the feedstock. 13 A large difference in the temperature profile inside the reactor is one disadvantage of the downdraft reactor because the reaction rate is not uniform over the area.…”

Section: Introductionmentioning

confidence: 99%

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Syngas Production for Fischer–Tropsch Synthesis from Rubber Wood Pellets and Eucalyptus Wood Chips in a Pilot Horizontal Gasifier with CaO as a Tar Removal Catalyst

et al. 2022

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This research aims to investigate steam biomass gasification in a pilot horizontal gasifier using rubber wood pellets (RWPs) and eucalyptus wood chips (EWCs) for producing syngas with an H 2 /CO ratio range of 1.8 to 2.3 for Fischer−Tropsch synthesis. The study was divided into two parts. One was carried out in a lab-scale reactor to determine the effect of temperature and CaO on the gas product composition and the efficiency of tar removal. Another part was determined by investigating the effect of the steam/biomass (S/B) ratio on the produced H 2 /CO ratios in the pilot horizontal gasifier, which used the optimum conditions of temperature and % loading of CaO for tar removal according to the optimal conditions from the lab-scale gasifier. The lab-scale gasifier results showed that H 2 and CO 2 increased with temperature due to primary and secondary water gas reactions and hydrocarbon reforming reactions. The water gas shift and hydrocarbon reforming reaction depressed the CO and CH 4 contents with increasing temperature, respectively. The optimum gasifying temperature was 900 °C, which obtained H 2 /CO ratios of 1.8 for both RWPs and EWCs. The tar yield decreased with increasing temperature and was less than 0.2 wt % when using CaO as a tar-cracking catalyst. The operation of the pilot horizontal gasifier at the operating condition of 900 °C and a S/B ratio of 0.5 using 0.2 wt % loading of CaO for tar removal also produced a H 2 /CO ratio of 2.0. The supply of an external heat source stabilized the gasifying temperature, resulting in a stable syngas composition and production rate of 2.5 and 2.7 kg/h with H 2 /CO ratios of 1.8 and 1.9 for the RWPs and EWCs, respectively. In summary, the horizontal gasifier is another effective designed gasifier that showed high-performance operation.

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