High temperature air-blown woody biomass gasification model for the estimation of an entrained down-flow gasifier

Kobayashi, Nobusuke; Tanaka, Miku; Piao, Guilin; Kobayashi, Jun; Hatano, Shigenobu; Itaya, Yoshinori; Mori, Shigekatsu

doi:10.1016/j.wasman.2008.04.014

Cited by 47 publications

(28 citation statements)

References 28 publications

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“…These studies show a high influence of gasification atmosphere both on carbon conversion and on the product gas composition. Recently, several biomass EFR pilot facilities have been built to study biomass gasification in conditions close to those of an industrial plant [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…In parallel, gasification models using equilibrium model [12] or CFD calculations [14] have been developed and tested. These models, which include simple reaction schemes, generally allow predicting the syngas composition with a good accuracy for the main gases (CO, H 2 , CO 2 , CH 4 , H 2 O) but are unable to predict tar and soot production.…”

Section: Introductionmentioning

confidence: 99%

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Influence of H 2 O, CO 2 and O 2 addition on biomass gasification in entrained flow reactor conditions: Experiments and modelling

Billaud

Valin

Peyrot

et al. 2016

Fuel

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. Influence of H2O, CO2 and O-2 addition on biomass gasification in entrained flow reactor conditions: Experiments and modelling. Fuel, Elsevier, 2016, 166, pp.166-178. 10 Experiments were modelled with a 1D-model using detailed chemical scheme. Gas, char, tar + soot were satisfactorily simulated in the whole range of conditions. ysis reaction, gas phase reaction with a detailed chemical scheme (176 species, 5988 reactions), char gasification by steam and CO 2 and soot formation. H 2 O or CO addition has no influence on gasification product yields at 800 and 1000 °C, while at 1200 and 1400 °C the char gasification is significantly enhanced and soot formation is certainly inhibited by OH radical which reacts with soot precursors. The modification of output gas phase composition is mostly due to WGS reaction which reaches thermodynamic equilibrium from about 1200 °C. As expected, O 2 has a significant influence on gas and tar yields through combustion reactions. Char and soot yields decrease as ER increases. The GASPAR model allows a good prediction of gas and char and gives relevant evolution of soot and tar yields on the large majority of conditions studied.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of H 2 O, CO 2 and O 2 addition on biomass gasification in entrained flow reactor conditions: Experiments and modelling

Billaud

Valin

Peyrot

et al. 2016

Fuel

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show abstract

“…Phosphorus is partitioned into solid residues [11] in gasification. For all of these reasons, gasification requires smaller and less expensive gas-cleaning facilities [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Wastewater Treatment and The Method of Sludge Disposal on the Gasification Process

Werle

Dudziak

2014

Ecological Chemistry and Engineering S

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Abstract:Municipal wastewater treatment results in the production of large quantities of sewage sludge, which requires proper environmentally accepted management before final disposal. Sewage sludge is a by-product of current wastewater treatment technologies. Sewage sludge disposal depends on the sludge treatment methods used in the wastewater treatment plant (anaerobic or aerobic digestion, drying, etc.). Taking into consideration presented given this information, a study concerning the effects of wastewater treatment processes and sewage sludge drying method on the sewage sludge gasification gas parameters was performed. Gasification is a prospective alternative method of sludge thermal treatment. For the purpose of experimental investigations, a laboratory fixed bed gasifier installation was designed and built. Two types of sewage sludge feedstock, SS1 and SS2, were analyzed. Sewage sludge SS1 came from a wastewater treatment plant operating in the mechanical and biological system while sewage sludge SS2 was collected in a mechanical, biological and chemical wastewater treatment plant with simultaneous phosphorus precipitation. The sludge produced at the plants was subject to fermentation and then, after being dehydrated, dried in a cylindrical drier on shelves heated up to 260ºC (sewage sludge SS1) and using hot air at a temperature of 150ºC in a belt drier (sewage SS2). The analysis shows that the sewage sludge properties strongly depend on the wastewater sources and the wastewater treatment processes. The gasification results, presented as a function of the amount of gasification agent, show that the greater oxygen content of SS1 caused a reduction in the reaction temperature. Paradoxically, this effect caused an increase in the quantity of combustible components in the gas. As expected, increasing the air flow rate caused a decrease in the heating value of the gas produced. A higher amount of oxidizer increases the amounts of noncombustible species and the volumetric fraction of nitrogen, thus reducing the heating value of the obtained gas. The higher hydrogen content in SS1 affects the gasification gas composition. As a result, combustible components are the majority of the syngas.

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“…Due to it most of sulphur, nitrogen, chloride and fluoride in sewage sludge may be released as H 2 S, NH 3 , HCl and HF. Secondly, a less volume of gas is produced compared to the volume of flue gas from combustion [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Sewage sludge gasification process for clean and sustainable environment

Werle

2016

Renew. Energy Environ. Sustain.

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Abstract. This work presents a multicriterial investigation of the sewage sludge gasification in the fixed bed gasifier. The operating parameters of gasification were varied over a wide range. Parameters such as air ratio l = 0.12-0.27, gasification agent preheating t = 50-250°C and gasification agent composition (z O2 ¼ 0:21 and z O2 > 0:21) were found to influence syngas lower heating value and syngas composition.

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High temperature air-blown woody biomass gasification model for the estimation of an entrained down-flow gasifier

Cited by 47 publications

References 28 publications

Influence of H 2 O, CO 2 and O 2 addition on biomass gasification in entrained flow reactor conditions: Experiments and modelling

Influence of H 2 O, CO 2 and O 2 addition on biomass gasification in entrained flow reactor conditions: Experiments and modelling

Influence of Wastewater Treatment and The Method of Sludge Disposal on the Gasification Process

Sewage sludge gasification process for clean and sustainable environment

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