Simulation of Cs behavior during the high temperature voloxidation process using the HSC chemistry code

Jeon, Min Ku; Shin, Jin-Myeong; Park, Jang Jin; Park, Geun Il

doi:10.1016/j.jnucmat.2012.06.040

Cited by 22 publications

(2 citation statements)

References 23 publications

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“…The Gibbs free energy values of eqs – were calculated by HSC [enthalpy ( H ), entropy ( S ), and heat capacity ( C )] chemistry thermodynamic software for verifying the possibility of the three reactions at 0–180 °C. , The calculation results are shown in Figure . It was found that the Gibbs free energy values of eqs – were far below zero and slightly increased as the temperature increased, indicating that all three reactions could occur spontaneously.…”

Section: Resultsmentioning

confidence: 99%

Leaching Vanadium from the Spent Denitration Catalyst in the Sulfuric Acid/Oxalic Acid Combined Solvent

Cheng,

Li,

Deng

et al. 2024

ACS Omega

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Huge amounts of spent denitration catalysts are produced annually as waste from the flue gas denitration process, which will cause resource waste and environmental pollution. It is important to develop an efficient method for the recovery of metals from spent denitration catalysts. In this work, the leaching of vanadium (V) from the spent denitration catalyst by the sulfuric acid/oxalic acid combined solvent was investigated. Factors that influence the leaching rate of V have been studied. Results showed that the optimal leaching rate was 95.65% by 20 wt % sulfuric acid and 0.3 mol•L −1 oxalic acid with a liquid-to-solid ratio of 20 mL• g −1 at 140 °C for 7 h. For further study of the leaching process, the leaching mechanism of V was explored subsequently. Results indicated that sulfuric acid provided a strongly acidic environment, which was beneficial to transformation, complexation, and redox reactions of V in the mixed acid leaching system. Meanwhile, oxalic acid with excellent complexation and reducing−dissolving properties promoted the formation of stable water-soluble VO 2+ . The "complex effect" generated from the combined acids was greatly favored for leaching V from the spent denitration catalyst.

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Section: Resultsmentioning

confidence: 99%

Leaching Vanadium from the Spent Denitration Catalyst in the Sulfuric Acid/Oxalic Acid Combined Solvent

Cheng,

Li,

Deng

et al. 2024

ACS Omega

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“…One is a “reaction equations” module for calculating Gibbs free energy variation at different temperatures. The other is an “equilibrium compositions” module to calculate each chemical composition at an equilibrium state …”

Section: Thermodynamic Analysis Methodsmentioning

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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New Process Research on Aluminium Production from Non-Traditional Aluminum Resource by Microwave Chlorination

et al. 2017

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Simulation of Cs behavior during the high temperature voloxidation process using the HSC chemistry code

Cited by 22 publications

References 23 publications

Leaching Vanadium from the Spent Denitration Catalyst in the Sulfuric Acid/Oxalic Acid Combined Solvent

Leaching Vanadium from the Spent Denitration Catalyst in the Sulfuric Acid/Oxalic Acid Combined Solvent

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

New Process Research on Aluminium Production from Non-Traditional Aluminum Resource by Microwave Chlorination

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