The Effect of Biomass Feedstock Type and Process Parameters on Achieving the Total Carbon Conversion in the Large Scale Fluidized Bed Gasification of Biomass

Antero Moilanen (Corresponding Author), Muhammad Nasrullah, Esa Kurkela

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

One option for the production of liquid biofuel in Finland is based on fluidized bed gasification of biomass and Fischer‐Tropsch synthesis process. The total carbon conversion achieved in the gasifier, operating at temperatures below 1000°C, depends mainly on the reactivity of solid char residue. The reactivity of the char residue is affected by temperature, partial pressures of the reactants H2O and CO2 and product gas components (H2 and CO), which are inhibiting the reactivity. In this reactivity, catalytic active substances, alkaline and earth‐alkaline metal compounds play a significant role. Other elements like silicon can react with the metals, leading to losses in the catalytic activity. These elements are naturally occurring in the biomass, and their behavior is individually dependent on the biomass type. The carbon conversion can be improved by increasing temperature, but it should not be too high to avoid ash sintering. By increasing the pressure, the reactivity increases normally, but for biomass it sometimes has no effect or it is even reduced. It was also observed that during the process of debarking and storage of biomass, it remains in contact with water, which can reduce the amount of some alkaline and earth alkaline metals because of leaching that can further affect reactivity and ash sintering. We studied the effects of the above‐mentioned factors on various barks, like spruce, pine, birch, aspen, which are the most potential biomass feedstock to be used in the large‐scale gasification in Finland. The measurements were carried out in the pressurized thermobalance in the conditions relevant for the pressurized oxygen gasification. Thus, the total pressure range was up to 20 bar, and the partial pressures of the reactants and the product gas components varied respectively. The parameters measured will be used for the development of the gasifier model.
Original languageEnglish
Pages (from-to)355-359
Number of pages5
JournalEnvironmental Progress and Sustainable Energy
Volume28
Issue number3
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Gasification
Fluidized beds
Feedstocks
Biomass
Carbon
Ashes
carbon
biomass
partial pressure
Partial pressure
ash
Sintering
Gases
Metals
Alkaline Earth Metals
alkaline earth metal
Alkaline earth metals
Biofuels
temperature
metal

Keywords

  • biomass
  • fluidized-bed gasification
  • ash
  • sintering
  • reactivity

Cite this

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title = "The Effect of Biomass Feedstock Type and Process Parameters on Achieving the Total Carbon Conversion in the Large Scale Fluidized Bed Gasification of Biomass",
abstract = "One option for the production of liquid biofuel in Finland is based on fluidized bed gasification of biomass and Fischer‐Tropsch synthesis process. The total carbon conversion achieved in the gasifier, operating at temperatures below 1000°C, depends mainly on the reactivity of solid char residue. The reactivity of the char residue is affected by temperature, partial pressures of the reactants H2O and CO2 and product gas components (H2 and CO), which are inhibiting the reactivity. In this reactivity, catalytic active substances, alkaline and earth‐alkaline metal compounds play a significant role. Other elements like silicon can react with the metals, leading to losses in the catalytic activity. These elements are naturally occurring in the biomass, and their behavior is individually dependent on the biomass type. The carbon conversion can be improved by increasing temperature, but it should not be too high to avoid ash sintering. By increasing the pressure, the reactivity increases normally, but for biomass it sometimes has no effect or it is even reduced. It was also observed that during the process of debarking and storage of biomass, it remains in contact with water, which can reduce the amount of some alkaline and earth alkaline metals because of leaching that can further affect reactivity and ash sintering. We studied the effects of the above‐mentioned factors on various barks, like spruce, pine, birch, aspen, which are the most potential biomass feedstock to be used in the large‐scale gasification in Finland. The measurements were carried out in the pressurized thermobalance in the conditions relevant for the pressurized oxygen gasification. Thus, the total pressure range was up to 20 bar, and the partial pressures of the reactants and the product gas components varied respectively. The parameters measured will be used for the development of the gasifier model.",
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The Effect of Biomass Feedstock Type and Process Parameters on Achieving the Total Carbon Conversion in the Large Scale Fluidized Bed Gasification of Biomass. / Moilanen, Antero (Corresponding Author); Nasrullah, Muhammad; Kurkela, Esa.

In: Environmental Progress and Sustainable Energy, Vol. 28, No. 3, 2009, p. 355-359.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The Effect of Biomass Feedstock Type and Process Parameters on Achieving the Total Carbon Conversion in the Large Scale Fluidized Bed Gasification of Biomass

AU - Moilanen, Antero

AU - Nasrullah, Muhammad

AU - Kurkela, Esa

N1 - Project code: 20700

PY - 2009

Y1 - 2009

N2 - One option for the production of liquid biofuel in Finland is based on fluidized bed gasification of biomass and Fischer‐Tropsch synthesis process. The total carbon conversion achieved in the gasifier, operating at temperatures below 1000°C, depends mainly on the reactivity of solid char residue. The reactivity of the char residue is affected by temperature, partial pressures of the reactants H2O and CO2 and product gas components (H2 and CO), which are inhibiting the reactivity. In this reactivity, catalytic active substances, alkaline and earth‐alkaline metal compounds play a significant role. Other elements like silicon can react with the metals, leading to losses in the catalytic activity. These elements are naturally occurring in the biomass, and their behavior is individually dependent on the biomass type. The carbon conversion can be improved by increasing temperature, but it should not be too high to avoid ash sintering. By increasing the pressure, the reactivity increases normally, but for biomass it sometimes has no effect or it is even reduced. It was also observed that during the process of debarking and storage of biomass, it remains in contact with water, which can reduce the amount of some alkaline and earth alkaline metals because of leaching that can further affect reactivity and ash sintering. We studied the effects of the above‐mentioned factors on various barks, like spruce, pine, birch, aspen, which are the most potential biomass feedstock to be used in the large‐scale gasification in Finland. The measurements were carried out in the pressurized thermobalance in the conditions relevant for the pressurized oxygen gasification. Thus, the total pressure range was up to 20 bar, and the partial pressures of the reactants and the product gas components varied respectively. The parameters measured will be used for the development of the gasifier model.

AB - One option for the production of liquid biofuel in Finland is based on fluidized bed gasification of biomass and Fischer‐Tropsch synthesis process. The total carbon conversion achieved in the gasifier, operating at temperatures below 1000°C, depends mainly on the reactivity of solid char residue. The reactivity of the char residue is affected by temperature, partial pressures of the reactants H2O and CO2 and product gas components (H2 and CO), which are inhibiting the reactivity. In this reactivity, catalytic active substances, alkaline and earth‐alkaline metal compounds play a significant role. Other elements like silicon can react with the metals, leading to losses in the catalytic activity. These elements are naturally occurring in the biomass, and their behavior is individually dependent on the biomass type. The carbon conversion can be improved by increasing temperature, but it should not be too high to avoid ash sintering. By increasing the pressure, the reactivity increases normally, but for biomass it sometimes has no effect or it is even reduced. It was also observed that during the process of debarking and storage of biomass, it remains in contact with water, which can reduce the amount of some alkaline and earth alkaline metals because of leaching that can further affect reactivity and ash sintering. We studied the effects of the above‐mentioned factors on various barks, like spruce, pine, birch, aspen, which are the most potential biomass feedstock to be used in the large‐scale gasification in Finland. The measurements were carried out in the pressurized thermobalance in the conditions relevant for the pressurized oxygen gasification. Thus, the total pressure range was up to 20 bar, and the partial pressures of the reactants and the product gas components varied respectively. The parameters measured will be used for the development of the gasifier model.

KW - biomass

KW - fluidized-bed gasification

KW - ash

KW - sintering

KW - reactivity

U2 - 10.1002/ep.10396

DO - 10.1002/ep.10396

M3 - Article

VL - 28

SP - 355

EP - 359

JO - Environmental Progress and Sustainable Energy

JF - Environmental Progress and Sustainable Energy

SN - 1944-7442

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ER -