Kinetics of SO2Removal from Flue Gas on CuO/Al2O3Sorbent Catalyst

Jia, Zhehua; Liu, Zhenyu; Zhao, Youhua

doi:10.1002/ceat.200700139

Cited by 16 publications

(7 citation statements)

References 14 publications

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“…Metal oxides and metal carbonates are the current adsorbents of throw-away processes consist of CaO (lime), MgO,Na2CO3,K2CO3,Fe2O3,etc. The main characteristic of these processes are simplicity of operation and economic efficiency (Gray &Jarvis 2020, Jia et al 2007, Tseng &Wey 2004. Major advantage of sodium carbonate is its ability to remove SO2 at low temperatures (about 200 o C).…”

Section: Background Informationmentioning

confidence: 99%

Kinetic Study of Low Temperature Sulfur Dioxide Removal Reaction By Sodium Carbonate Using Random Pore Model

Omidi

Ebrahim

2021

Preprint

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An experimental investigation of low temperature SO2 removal by porous sodium carbonate was carried out by thermogravimetry. As well as, applied mathematical modeling based on the random pore model was employed to kinetic study of this reaction. The experiments were performed at various temperatures (100-250 oC) and different SO2 concentrations (0.13-1.12 vol%). The initial slopes procedure was used to determine dependency of the reaction rate constants versus temperature. First-order kinetic with respect to gaseous reactant was found and value of activation energy was attained as 22.5 kJ mol-1. Product layer diffusion coefficients were evaluated by the best fitting of experimental data with the model predictions. These random pore model predictions indicated good agreement with experimental conversion-time data at various conditions. The resulted kinetic parameters were avail abled for engineering calculations of SO2 abatement from the coal-based power plants by low-temperature flue gas desulfurization.

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Section: Background Informationmentioning

confidence: 99%

Kinetic Study of Low Temperature Sulfur Dioxide Removal Reaction By Sodium Carbonate Using Random Pore Model

Omidi

Ebrahim

2021

Preprint

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“…Previous study showed that 5% NH 3 at 400 • C can directly convert SO 2 that is regenerated from catalyst into solid ammonium sulfur salts [139]. The removal efficiencies of SO 2 and NO, respectively, were defined as: [ Much of the literature gave detailed descriptions on the issues of SO 2 and NOx removal [139][140][141][142][143][144][145][146]. Table 5 shows some experimental work available in literature on the simultaneous NOx/SOx removal studies.…”

Section: Simultaneous So 2 /Nox Removal From Flue Gasmentioning

confidence: 99%

“…Previous studies have shown that sulfuric deactivated activated carbon can be heated to above 350 • C, and sulfuric acid is reduced to produce concentrated SO 2 under inert gases or by heating in a reductive gas flow (NH 3 , urea, CO, CH 4 , H 2 ) [7,42]. NH 3 is a favorable reductant for Al 2 (SO 4 ) 3 in contrast to H 2 and CH 4 , due to its regeneration potential on the catalyst at the temperatures of the SO 2 removal (400 • C) [142].…”

Section: Regenerationmentioning

confidence: 99%

Monolith Metal-Oxide-Supported Catalysts: Sorbent for Environmental Application

et al. 2020

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The emission of untreated environmental harmful gases such as sulfur and nitrogen oxide (SOx and NOx) emissions is considered old fashioned, since industries are compelled by governments and legislations to meet the minimum threshold before emitting such substances into the atmosphere. Numerous research has been done and is ongoing to come up with both cost-effective equipment and regenerable catalysts that are adsorbent—or with enhanced sorption capacity—and with safer disposal methods. This work presents the general idea of a monolith/catalyst for environmental application and the technicality for improving the surface area for fast and efficient adsorption–desorption reactions. The chemical reactions, adsorption kinetics, and other properties, including deactivation, regeneration, and the disposal of a catalyst in view of environmental application, are extensively discussed.

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“…To further investigate the reaction rate and reaction mechanism, various metal oxides were analyzed for removing SO 2 . Among them, the calcium-based kinetics of desulfurization and regeneration were conducted numerous researches. − Similarly, the other researchers carried out the kinetic studies on copper-based − and manganese-based − sorbents in desulfurization-regeneration cycles. Based on previous research, the possible kinetics reactions in the reactors are presented as follows.…”

Section: Mechanism Of Flue-gas Desulfurization With Cltmentioning

confidence: 99%

Selection of Desulfurizer and Control of Reaction Products on Flue-Gas Desulfurization Using Chemical-Looping Technology

Yang

Qin

et al. 2017

Energy Fuels

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Chemical-looping technology (CLT) can achieve energy efficiency and reduce the environmental pollution and is usually conducted on a fixed-bed reactor. In this paper, the thermodynamic simulations for flue-gas desulfurization (FGD) systems with CLT are carried out using HSC Chemistry software to choose a suitable desulfurizer, control the type and quantities of reaction products, and collect sulfur-containing byproducts with high economic value. The Ellingham diagrams are developed to relate the Gibbs free energy of the relevant reactions to the temperature. The fixing-sulfur potential; the reaction degree with CO 2 , H 2 O, and CO; and the acceleration effect of removing NO x of different metal oxides in 100 to 300 °C are estimated. Compared comprehensively, Mn-based oxides have distinct advantages for flue-gas desulfurization using CLT. Based on calculation results, both low reaction temperatures (T < 400 °C) and sufficient H 2 (m H 2 /m MnSO 4 > 4) can effectively prevent the loss of sulfur element. In the regeneration of Mn 3 O 4 , if pure O 2 is replaced by diluent air or a low level of oxygen, the formation of trace amounts of MnSO 4 can be inhibited. This paper provides ample theoretical basis for Mn-based oxides as active components of desulfurizer and collecting pure SO 2 from flue gas through chemical-looping technology.

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Kinetics of SO₂Removal from Flue Gas on CuO/Al₂O₃Sorbent Catalyst

Cited by 16 publications

References 14 publications

Kinetic Study of Low Temperature Sulfur Dioxide Removal Reaction By Sodium Carbonate Using Random Pore Model

Kinetic Study of Low Temperature Sulfur Dioxide Removal Reaction By Sodium Carbonate Using Random Pore Model

Monolith Metal-Oxide-Supported Catalysts: Sorbent for Environmental Application

Selection of Desulfurizer and Control of Reaction Products on Flue-Gas Desulfurization Using Chemical-Looping Technology

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