Characterization of gasification reactivity of peat char in pressurized conditions: Effect of product gas inhibition and inorganic material

Antero Moilanen, Heinz-Jurgen Muhlen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The characteristic effects of the main operating parameters in pressurized fluidized bed gasification, such as pressure and product gas composition, and of inorganic material on peat char gasification reactivity were studied. The measurements were carried out isothermally in a pressurized thermobalance at temperatures between 1023 and 1233 K and pressures up to 1.5 MPa. Steam and carbon dioxide, both pure and mixed with the product gases H2 and CO, were used as reaction agents. The reactivity was expressed in the form of instantaneous gasification rate vs. char burnoff. The steam gasification rate of peat char was only slightly higher than the CO2 gasification rate, and the gasification rates decreased at increasing pressure in both steam and carbon dioxide. The steam gasification rate of the peat char increased to a maximum before decreasing with increasing char burnoff. In carbon dioxide, the main trend was that the gasification rate slightly increased with the burnoff. Demineralization of the peat decreased the reactivity and also removed the negative burnoff behaviour observed in steam gasification. The presence of the product gases H2 and CO inhibited the gasification of the peat char almost entirely.
Original languageEnglish
Pages (from-to)1279-1285
Number of pages7
JournalFuel
Volume75
Issue number11
DOIs
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed

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Peat
Gasification
Gases
Steam
Carbon Dioxide
Carbon dioxide
Carbon Monoxide
Fluidized beds

Keywords

  • gasification

Cite this

@article{2d8faf943fd44a509b0b7ba3fdc26339,
title = "Characterization of gasification reactivity of peat char in pressurized conditions: Effect of product gas inhibition and inorganic material",
abstract = "The characteristic effects of the main operating parameters in pressurized fluidized bed gasification, such as pressure and product gas composition, and of inorganic material on peat char gasification reactivity were studied. The measurements were carried out isothermally in a pressurized thermobalance at temperatures between 1023 and 1233 K and pressures up to 1.5 MPa. Steam and carbon dioxide, both pure and mixed with the product gases H2 and CO, were used as reaction agents. The reactivity was expressed in the form of instantaneous gasification rate vs. char burnoff. The steam gasification rate of peat char was only slightly higher than the CO2 gasification rate, and the gasification rates decreased at increasing pressure in both steam and carbon dioxide. The steam gasification rate of the peat char increased to a maximum before decreasing with increasing char burnoff. In carbon dioxide, the main trend was that the gasification rate slightly increased with the burnoff. Demineralization of the peat decreased the reactivity and also removed the negative burnoff behaviour observed in steam gasification. The presence of the product gases H2 and CO inhibited the gasification of the peat char almost entirely.",
keywords = "gasification",
author = "Antero Moilanen and Heinz-Jurgen Muhlen",
year = "1996",
doi = "10.1016/0016-2361(96)00105-6",
language = "English",
volume = "75",
pages = "1279--1285",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier",
number = "11",

}

Characterization of gasification reactivity of peat char in pressurized conditions : Effect of product gas inhibition and inorganic material. / Moilanen, Antero; Muhlen, Heinz-Jurgen.

In: Fuel, Vol. 75, No. 11, 1996, p. 1279-1285.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characterization of gasification reactivity of peat char in pressurized conditions

T2 - Effect of product gas inhibition and inorganic material

AU - Moilanen, Antero

AU - Muhlen, Heinz-Jurgen

PY - 1996

Y1 - 1996

N2 - The characteristic effects of the main operating parameters in pressurized fluidized bed gasification, such as pressure and product gas composition, and of inorganic material on peat char gasification reactivity were studied. The measurements were carried out isothermally in a pressurized thermobalance at temperatures between 1023 and 1233 K and pressures up to 1.5 MPa. Steam and carbon dioxide, both pure and mixed with the product gases H2 and CO, were used as reaction agents. The reactivity was expressed in the form of instantaneous gasification rate vs. char burnoff. The steam gasification rate of peat char was only slightly higher than the CO2 gasification rate, and the gasification rates decreased at increasing pressure in both steam and carbon dioxide. The steam gasification rate of the peat char increased to a maximum before decreasing with increasing char burnoff. In carbon dioxide, the main trend was that the gasification rate slightly increased with the burnoff. Demineralization of the peat decreased the reactivity and also removed the negative burnoff behaviour observed in steam gasification. The presence of the product gases H2 and CO inhibited the gasification of the peat char almost entirely.

AB - The characteristic effects of the main operating parameters in pressurized fluidized bed gasification, such as pressure and product gas composition, and of inorganic material on peat char gasification reactivity were studied. The measurements were carried out isothermally in a pressurized thermobalance at temperatures between 1023 and 1233 K and pressures up to 1.5 MPa. Steam and carbon dioxide, both pure and mixed with the product gases H2 and CO, were used as reaction agents. The reactivity was expressed in the form of instantaneous gasification rate vs. char burnoff. The steam gasification rate of peat char was only slightly higher than the CO2 gasification rate, and the gasification rates decreased at increasing pressure in both steam and carbon dioxide. The steam gasification rate of the peat char increased to a maximum before decreasing with increasing char burnoff. In carbon dioxide, the main trend was that the gasification rate slightly increased with the burnoff. Demineralization of the peat decreased the reactivity and also removed the negative burnoff behaviour observed in steam gasification. The presence of the product gases H2 and CO inhibited the gasification of the peat char almost entirely.

KW - gasification

U2 - 10.1016/0016-2361(96)00105-6

DO - 10.1016/0016-2361(96)00105-6

M3 - Article

VL - 75

SP - 1279

EP - 1285

JO - Fuel

JF - Fuel

SN - 0016-2361

IS - 11

ER -