The University of Southampton
University of Southampton Institutional Repository

Investigation of the pore blockage of a Brazilian dolomite during the surfation reaction

Investigation of the pore blockage of a Brazilian dolomite during the surfation reaction
Investigation of the pore blockage of a Brazilian dolomite during the surfation reaction
The influence of the temperature and reaction time on the sulfation process of a dolomite is investigated in this paper. The sulfation effectiveness was evaluated and correlated with changes in the physical characteristics of a Brazilian dolomite during the reactive process. Calcination and sulfation experiments were performed under isothermal conditions for dolomite samples with average particle sizes of 545 ?m at temperatures of 750 °C, 850 °C and 950 °C at different times of sulfation. Thermogravimetric tests were applied to establish the reactivity variation of the dolomite in function of the time in the sulfation reaction and evaluate the methodology of the samples preparation. Porosimetry tests were performed to study the pore blockage of dolomite during the sulfation reaction. The highest values of BET surface area were 25.55 m2/g, 29.55 m2/g and 12.62 m2/g for calcined samples and after their sulfation processes, conversions of 51.5%, 61.9% and 42.8% were obtained at 750 °C, 850 °C and 950 °C, respectively. Considering the process as a whole, the best fit was provided by a first-order exponential decay equation. Moreover, the results have shown that it is possible to quantify the decreasing in the dolomite reactivity for sulfur dioxide sorption and understand the changes in the behavior of the sulfation process of limestones when applied to technologies, as fluidized bed combustor, in which sulfur dioxide is present
pore blockage, dolomite, ulfation, thermal decomposition, BET surface area
0169-4332
3532-3539
Avila, Ivonete
9176ba32-b103-4514-a6bd-1e741a63066d
Crnkovic, Paula M.
050303ad-3e9b-490a-bc3b-6fb517a7d54e
Milioli, Fernando E.
ec3b83db-27a2-464d-b7cc-44dfc0dc991b
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b
Avila, Ivonete
9176ba32-b103-4514-a6bd-1e741a63066d
Crnkovic, Paula M.
050303ad-3e9b-490a-bc3b-6fb517a7d54e
Milioli, Fernando E.
ec3b83db-27a2-464d-b7cc-44dfc0dc991b
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b

Avila, Ivonete, Crnkovic, Paula M., Milioli, Fernando E. and Luo, Kai H. (2012) Investigation of the pore blockage of a Brazilian dolomite during the surfation reaction. Applied Surface Science, 258 (8), 3532-3539. (doi:10.1016/j.apsusc.2011.11.108,).

Record type: Article

Abstract

The influence of the temperature and reaction time on the sulfation process of a dolomite is investigated in this paper. The sulfation effectiveness was evaluated and correlated with changes in the physical characteristics of a Brazilian dolomite during the reactive process. Calcination and sulfation experiments were performed under isothermal conditions for dolomite samples with average particle sizes of 545 ?m at temperatures of 750 °C, 850 °C and 950 °C at different times of sulfation. Thermogravimetric tests were applied to establish the reactivity variation of the dolomite in function of the time in the sulfation reaction and evaluate the methodology of the samples preparation. Porosimetry tests were performed to study the pore blockage of dolomite during the sulfation reaction. The highest values of BET surface area were 25.55 m2/g, 29.55 m2/g and 12.62 m2/g for calcined samples and after their sulfation processes, conversions of 51.5%, 61.9% and 42.8% were obtained at 750 °C, 850 °C and 950 °C, respectively. Considering the process as a whole, the best fit was provided by a first-order exponential decay equation. Moreover, the results have shown that it is possible to quantify the decreasing in the dolomite reactivity for sulfur dioxide sorption and understand the changes in the behavior of the sulfation process of limestones when applied to technologies, as fluidized bed combustor, in which sulfur dioxide is present

Full text not available from this repository.

More information

e-pub ahead of print date: 1 December 2011
Published date: 1 February 2012
Keywords: pore blockage, dolomite, ulfation, thermal decomposition, BET surface area
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 334456
URI: https://eprints.soton.ac.uk/id/eprint/334456
ISSN: 0169-4332
PURE UUID: c28109f6-a4af-4b9e-96ce-dfdd8ec2f805

Catalogue record

Date deposited: 09 Mar 2012 11:47
Last modified: 18 Jul 2017 06:11

Export record

Altmetrics

Contributors

Author: Ivonete Avila
Author: Paula M. Crnkovic
Author: Fernando E. Milioli
Author: Kai H. Luo

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×