Experimental study on biomass gasification in a double air stage downdraft reactor

Martínez, Juan Daniel; Lora, Electo Eduardo Silva; Andrade, Rubenildo Vieira; Jaén, René Lesme

doi:10.1016/j.biombioe.2011.04.049

Cited by 115 publications

(43 citation statements)

References 32 publications

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“…Although ashes content is lower [6,[9][10][11] or similar [22] to that of some sewage sludge already used for gasification experimentation, it is high compared with that of biomass normally used for gasification. Volatiles content is in the range of the values found in the literature for sewage sludge to be used as fuel for gasification [10,13,22] while different biomass-based fuels used for gasification in the literature may have higher [23][24][25] or lower [26] volatiles content.…”

Section: Fuel Propertiesmentioning

confidence: 83%

Sustainability of Domestic Sewage Sludge Disposal

2016

Sewage and Landfill Leachate

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The gasification of sewage sludge was carried out in a simple atmospheric fluidized bed gasifier. Flow and fuel feed rate were adjusted for experimentally obtaining an air mass : fuel mass ratio (A/F) of 0.2 < A/F < 0.4. Fuel characterization, mass and power balances, produced gas composition, gas phase alkali and ammonia, tar concentration, agglomeration tendencies, and gas efficiencies were assessed. Although accumulation of material inside the reactor was a main problem, this was avoided by removing and adding bed media along gasification. This allowed improving the process heat transfer and, therefore, gasification efficiency. The heating value of the produced gas was 8.4 MJ/Nm, attaining a hot gas efficiency of 70% and a cold gas efficiency of 57%.

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Section: Fuel Propertiesmentioning

confidence: 83%

Sustainability of Domestic Sewage Sludge Disposal

2016

Sewage and Landfill Leachate

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“…Additionally, the resulting solid fraction after gasification -char-is modeled as pure carbon (Table 1, Eq. 9), which is a byproduct of a real gasification process (Martínez et al 2011;Lenis et al 2016). …”

Section: Model Descriptionmentioning

confidence: 99%

Effect of Torrefied Wood Biomass under an Oxidizing Environment in a Downdraft Gasification Process

Ramos-Carmona

Pérez

2017

BioResources

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The effect of composition and heating value of torrefied biomass under an oxidizing atmosphere at different conditions (180, 210, and 240 °C during 30, 75, and 120 minutes) was studied relative to downdraft gasification performance. An extended model for gasification in thermochemical equilibrium was used to evaluate the effect of pretreated biomasses, fuelto-air equivalence ratio, and char byproduct production on the producer gas composition, reaction temperature, cold gas efficiency (CGE), and the engine fuel quality (EFQ). The model was validated with experimental data, reaching a global relative error of 8.5%. For raw or torrefied biomasses, with regard to char production, the CGE decreases if char increases; this is due to the fact that the process tends to combustion regimes when a lower amount of carbon is involved in the gasification reaction. Otherwise, the CGE and EFQ increase (up to 80% and 2.5 MJ/kg, respectively) if fuel-to-air ratio increases. With regard to the torrefied biomass, it is highlighted that CGE and EFQ increase from 77% to 82% and from 2.2 MJ/kg to 2.5 MJ/kg, respectively, when the torrefaction conditions (temperature and/or time) increase. This behavior is related to the increase of the autothermal zones in the gasification process and due to the higher heating value of torrefied biomass.

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“…The solid fuel must be converted into gas or liquid fuel. Gasification process is one of the technology that could converts solid fuel into gas fuel and has a compatible value to the crude oil [1]. Gasification process could be done on several types of gasifier.…”

Section: Introductionmentioning

confidence: 99%

Design, Construction and Experiment on Imbert Downdraft Gasifier Using South Sumatera Biomass and Low Rank Coal as Fuel

Vidian¹,

Basri²,

Sihotang³

2017

IJERA

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The solid fuel must be converted to gas fuel or liquid fuel for application to internal combustion engine or gas turbine. Gasification is a technology to convert solid fuel into combustible gas. Gasification system generally consists of a gasifier, cyclone, spray tower and filter. This study is purposed to design, construction, and experiment of gasification system. The imbert downdraft gasifier was designed with 42 kg/h for the maximum capacity of fuel consumption, 90 cm for height, 26.8 cm for main diameter and 12 cm for throat diameter. The gasifier was constructed from stainless steel material of SUS 304. Biomass and low rank coal from South Sumatera, Indonesia was used as fuel. The result of the experiment showed that combustible gas was produced after 15 minutes operation in average. The air fuel ratio of low rank coal was 1.7 which was higher than biomass (1.1). Combustible gas stopped producing when the fuel went down below the throat of gasifier.

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Experimental study on biomass gasification in a double air stage downdraft reactor

Cited by 115 publications

References 32 publications

Sustainability of Domestic Sewage Sludge Disposal

Sustainability of Domestic Sewage Sludge Disposal

Effect of Torrefied Wood Biomass under an Oxidizing Environment in a Downdraft Gasification Process

Design, Construction and Experiment on Imbert Downdraft Gasifier Using South Sumatera Biomass and Low Rank Coal as Fuel

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