Bench-scale and modeling study of sulfur capture by limestone in typical CO2 concentrations and temperatures of fluidized-bed air and oxy-fuel combustion

S. Rahiala (Corresponding Author), T. Hyppänen, Toni Pikkarainen

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

In this study, the influence of CO2 on sulfur capture efficiency was studied during fluidized-bed desulfurization by experiments and modeling. During calcination–sulfation and direct sulfation, the effect was examined with one limestone type. A time-dependent multilayer particle model was used for analyzing the experimental results. The model determines the magnitude of the reactions and the diffusion as a function of the radius and time. In high temperatures (∼1200 K), CO2 increased the conversion degree during calcination–sulfation. In direct sulfation, the effect of CO2 was opposite; lower conversion was obtained when the CO2 concentration was increased. When the CO2 concentration was increased in low temperatures (∼1100 K) (close to the calcination curve), CO2 retarded the conversion strongly. The detected differences between the results are explained with the development of the Thiele number, conversion curve, and conversion profile during the reactions.
Original languageEnglish
Pages (from-to)7664-7672
Number of pages9
JournalEnergy & Fuels
Volume27
Issue number12
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Calcium Carbonate
Limestone
Sulfur
Fluidized beds
Desulfurization
Air
Calcination
Multilayers
Temperature
Experiments

Cite this

@article{2ac9c9ffd1c24b9e9548797e830139c2,
title = "Bench-scale and modeling study of sulfur capture by limestone in typical CO2 concentrations and temperatures of fluidized-bed air and oxy-fuel combustion",
abstract = "In this study, the influence of CO2 on sulfur capture efficiency was studied during fluidized-bed desulfurization by experiments and modeling. During calcination–sulfation and direct sulfation, the effect was examined with one limestone type. A time-dependent multilayer particle model was used for analyzing the experimental results. The model determines the magnitude of the reactions and the diffusion as a function of the radius and time. In high temperatures (∼1200 K), CO2 increased the conversion degree during calcination–sulfation. In direct sulfation, the effect of CO2 was opposite; lower conversion was obtained when the CO2 concentration was increased. When the CO2 concentration was increased in low temperatures (∼1100 K) (close to the calcination curve), CO2 retarded the conversion strongly. The detected differences between the results are explained with the development of the Thiele number, conversion curve, and conversion profile during the reactions.",
author = "S. Rahiala and T. Hypp{\"a}nen and Toni Pikkarainen",
note = "Project code: 74622",
year = "2013",
doi = "10.1021/ef401971m",
language = "English",
volume = "27",
pages = "7664--7672",
journal = "Energy & Fuels",
issn = "0887-0624",
publisher = "American Chemical Society",
number = "12",

}

Bench-scale and modeling study of sulfur capture by limestone in typical CO2 concentrations and temperatures of fluidized-bed air and oxy-fuel combustion. / Rahiala, S. (Corresponding Author); Hyppänen, T.; Pikkarainen, Toni.

In: Energy & Fuels, Vol. 27, No. 12, 2013, p. 7664-7672.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Bench-scale and modeling study of sulfur capture by limestone in typical CO2 concentrations and temperatures of fluidized-bed air and oxy-fuel combustion

AU - Rahiala, S.

AU - Hyppänen, T.

AU - Pikkarainen, Toni

N1 - Project code: 74622

PY - 2013

Y1 - 2013

N2 - In this study, the influence of CO2 on sulfur capture efficiency was studied during fluidized-bed desulfurization by experiments and modeling. During calcination–sulfation and direct sulfation, the effect was examined with one limestone type. A time-dependent multilayer particle model was used for analyzing the experimental results. The model determines the magnitude of the reactions and the diffusion as a function of the radius and time. In high temperatures (∼1200 K), CO2 increased the conversion degree during calcination–sulfation. In direct sulfation, the effect of CO2 was opposite; lower conversion was obtained when the CO2 concentration was increased. When the CO2 concentration was increased in low temperatures (∼1100 K) (close to the calcination curve), CO2 retarded the conversion strongly. The detected differences between the results are explained with the development of the Thiele number, conversion curve, and conversion profile during the reactions.

AB - In this study, the influence of CO2 on sulfur capture efficiency was studied during fluidized-bed desulfurization by experiments and modeling. During calcination–sulfation and direct sulfation, the effect was examined with one limestone type. A time-dependent multilayer particle model was used for analyzing the experimental results. The model determines the magnitude of the reactions and the diffusion as a function of the radius and time. In high temperatures (∼1200 K), CO2 increased the conversion degree during calcination–sulfation. In direct sulfation, the effect of CO2 was opposite; lower conversion was obtained when the CO2 concentration was increased. When the CO2 concentration was increased in low temperatures (∼1100 K) (close to the calcination curve), CO2 retarded the conversion strongly. The detected differences between the results are explained with the development of the Thiele number, conversion curve, and conversion profile during the reactions.

U2 - 10.1021/ef401971m

DO - 10.1021/ef401971m

M3 - Article

VL - 27

SP - 7664

EP - 7672

JO - Energy & Fuels

JF - Energy & Fuels

SN - 0887-0624

IS - 12

ER -