Kinetics of dry flue gas desulfurization at low temperatures using Ca(OH)2: competitive reactions of sulfation and carbonation

Garea, A.; Herrera, José Luis; Marqués, J.A.; Irabien, Ángel

doi:10.1016/s0009-2509(00)00362-6

Cited by 34 publications

(16 citation statements)

References 10 publications

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“…As is the case in coal combustion, it is necessary to adsorb and control SO x emission during co-combustion. Many kinds of adsorbents have been adopted in the past, particularly calcium-based adsorbents [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. The first generation of calciumbased scrubbers (a type of FGD) was made in Great Britain in 1920.…”

Section: Introductionmentioning

confidence: 99%

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Sulfur Removal in Bio-Briquette Combustion Using Seashell Waste Adsorbent at Low Temperature

Mahidin

Gani

Muslim

et al. 2016

J. Eng. Technol. Sci.

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Abstract. Presently, biomass is mostly utilized as co-fuel in coal combustion in view of energy diversification and emission reduction. However, since the coal content of bio-briquettes is high (up to 80% in this study), gas emissions such as those of SO x still occur. Therefore, the introduction of SO 2 adsorbent is common in coal briquette or bio-briquette combustion. A calcium-based material is usually used for this goal. The aim of this study was to observe the effects of desulfurization temperature and Ca/S ratio (Ca = calcium content in adsorbent; S = sulfur content in coal and biomass) on desulfurization efficiency and kinetics. The ratio of coal to biomass (palm kernel shell/PKS) was fixed at 90:10 (wt/wt) and the ratios of Ca to S were varied at 1:1, 1.25:1, 1.5:1, 1.75:1 and 2:1. The mixtures of coal, PKS and adsorbent were briquetted at a molding pressure of 6 ton/cm 2 with Jatropha curcas seeds and starch mixture as binding agents. Desulfurization was performed within a temperature range of 300 to 500°C for 720 seconds at an airflow rate of 1.2 L/min. The results showed that the highest desulfurization efficiency (90.6%) was associated with the Ca/S ratio of 2:1 and temperature of 400°C. Moreover, the highest reaction rate constant of desulfurization was 0.280 min -1 .

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Section: Introductionmentioning

confidence: 99%

“…Limestone (in the form of CaO and Ca(OH) 2 in some cases) is commonly added as adsorbent to coal and coal/co-fuel blend combustions, both for pulverized and briquetted coal [19][20][21][22][23][24][25]. There is also a combined adsorbent of Ca(OH) 2 /fly ash [21].…”

Section: Introductionmentioning

confidence: 99%

Sulfur Removal in Bio-Briquette Combustion Using Seashell Waste Adsorbent at Low Temperature

Mahidin

Gani

Muslim

et al. 2016

J. Eng. Technol. Sci.

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“…In general, ionic reactions are instantaneous in aqueous phase, but extremely slow in the absence of water (Hill and Zank, 2000); the fundamentality of water are also observed by other researchers in the process of desulfuriztion (Yu et al, 2001;Krammer et al, 1997;Izquierdo et al, 1992;Garea et al, 2001). Therefore, the inertial impactions between high-CaO coal ash particles and atomization droplets is very important for the flue gas desulfurization (FGD) process, which could make the droplets contain large quantity of ash particles and make slow gas-solid reaction transform into instantaneous ionic reaction.…”

Section: Introductionmentioning

confidence: 64%

Modeling study on the impaction and humidification process in desulfurization activation reactor

Wang

Song

Zhang

et al. 2005

Chemical Engineering Science

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“…It is known that when the temperature approaches the saturation temperature of the flue gas, the conversion approaches 100 % [16,21,22,25]. Thus, the reaction rate must obtain very high values.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Dynamic Modeling and Analysis of an Industrial Gas Suspension Absorber for Flue Gas Desulfurization

Cignitti

Mansouri

Sales‐Cruz

et al. 2015

Emiss. Control Sci. Technol.

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In this work, semidry desulfurization of flue gas using a gas suspension absorber (GSA) is studied. A simple dynamic model which can properly represent the GSA was developed. In order to model the reaction kinetics, an empirical reaction rate expression was introduced. The reaction rate expression parameters were fitted to operational data from a real cement plant. A detailed statistical analysis of the parameter estimation procedure was performed, and the confidence intervals for estimated kinetic parameters were calculated. The model and reaction rate expression prediction ability was tested using another plant data set. It was verified that in spite of the simplicity of the model, very good prediction of industrial behavior was obtained. Furthermore, the dynamic analysis of the system was performed by carrying out open-loop and closed-loop simulations to verify plant dynamics. Therefore, a simple dynamic model with a reaction rate expression that is simple and efficient to use to predict the dynamics of GSA process was proposed in this work.

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Kinetics of dry flue gas desulfurization at low temperatures using Ca(OH)2: competitive reactions of sulfation and carbonation

Cited by 34 publications

References 10 publications

Sulfur Removal in Bio-Briquette Combustion Using Seashell Waste Adsorbent at Low Temperature

Sulfur Removal in Bio-Briquette Combustion Using Seashell Waste Adsorbent at Low Temperature

Modeling study on the impaction and humidification process in desulfurization activation reactor

Dynamic Modeling and Analysis of an Industrial Gas Suspension Absorber for Flue Gas Desulfurization

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