Study on the Relationship between Absorbed S(IV) and pH in the Seawater Flue Gas Desulfurization Process

Lan, Tian; Zhang, Qizhou; Yu, Qihui; Lei, Lecheng

doi:10.1021/ie202770b

Cited by 12 publications

(9 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among them, the wet scrubber process emerged as the dominant technology. It accounted for more than 72% of total flue gas desulfurization (FGD) systems . Although this process has many advantages, it is difficult to apply widely in China because of poor economic efficiency: (1) the cost‐effectiveness of alkaline liquor is usually low, leading to high capital and operating expenses.…”

Section: Introductionmentioning

confidence: 99%

Se‐catalyzed process of sodium bisulfite disproportionation

Chai

Yang

Liu

et al. 2015

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: SO 2 is an important gaseous pollutant that seriously affects the environment and human health. The most common method for SO 2 removal is absorption by NaOH solution and then forming HSO 3 − . Since generation of high-value products and reduction of alkali consumption are important for the economy and practical application, selenium-catalyzed HSO 3 − disproportionation was developed in this study.RESULTS: Selenium decreased the reaction temperature of HSO 3 − disproportionation from >433 K to 343 K. The effects of HSO 3 − concentration, temperature, selenium dosage, and stirring intensity were investigated. Selenium could be used at least five times with stable catalytic performance, indicating satisfactory reusability. More importantly, a catalytic mechanism was proposed using dynamic light scattering, differential scanning calorimetry and UV-visible transmittance spectrophotometry. Results showed that selenium-catalyzed HSO 3 − disproportionation experienced a solid-liquid-solid phase transformation process. During this process, SeSO 3 2− and HSe − were identified as the intermediates. Furthermore, products, i.e. sulfur and sodium bisulfate, were characterized to demonstrate their structure and composition. CONCLUSION: Selenium was an efficient catalyst for HSO 3− disproportionation. This catalytic process offered the advantages of less consumption of alkali and production of high-valuable products, and thus was a potential alternative to other technology for SO 2 removal in practical applications. /jctb As shown in the inset graph, standard HSO 3 − had an obvious characteristic absorption peak at 230-350 nm. However, the peak at 235 nm decreased when reaction time was increased from 10 to

show abstract

Section: Introductionmentioning

confidence: 99%

Se‐catalyzed process of sodium bisulfite disproportionation

Chai

Yang

Liu

et al. 2015

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…2 The whole concentration of SO 3 2-reacts with O 2 content in water to produce SO 4 2-, causing a decrease in the O 2 concentration (Lan et al, 2012).…”

Section: Absorption Of So 2 In the Absorbermentioning

confidence: 99%

Impact of variables on efficiency of flue gas desulphurisation plant in Longannet Power Station (ScottishPower)

Lafuente

Edwardson

2016

IJOGCT

View full text Add to dashboard Cite

Flue gas desulphurisation (FGD) plant has been recently installed at Longannet Power Station with the aim of removing sulphur dioxide (SO 2 ) from the flue gases. The FGD plant produces a reduction of around 94% of the SO 2 emissions, contributing to meet the current SO 2 emissions legislation. Therefore, the use of the FGD plant contributes to extend the life of the power station. However, due to the nature of the sea-water scrubbing technology, the FGD plant, it produces an acidic effluent which needs to be controlled to meet the water discharge limits. The aim of this study is to improve the FGD plant efficiency. A thorough study of the FGD process derives to an expression for the pH and dissolved oxygen concentration in the discharge water. It serves to review the influencing factors affecting the efficiency of the FGD plant. In addition, the approximated prediction model derives to a new SO 2 load to flume limit, which is less conservative that the one in use. This would permit an increase of the FGD plant efficiency, minimising costs. Tests are recommended to obtain the unknown parameters in the proposed SO 2 load to flume limit.

show abstract

“…Sulphur dioxide, serving as one of the primary contributors giving rise to atmospheric pollution, has a negative effect on human health as well as the environment [1][2][3]. Moreover, the combustion of fossil fuels, especially coal, in power plants is the major cause for existence of sulphur dioxide in the atmosphere [4]. erefore, the removal of sulphur dioxide in flue gas from coal-fired power plants is of great significance and has gradually become the overriding concern to the public.…”

Section: Introductionmentioning

confidence: 99%

Multimodel Anomaly Identification and Control in Wet Limestone-Gypsum Flue Gas Desulphurization System

Liu

Wang

et al. 2020

Complexity

View full text Add to dashboard Cite

Sulphur dioxide, as one of the most common air pollutant gases, brings considerable numbers of hazards on human health and environment. For the purpose of reducing the detrimental effect it brings, it is of urgent necessity to control emissions of flue gas in power plants, since a substantial proportion of sulphur dioxide in the atmosphere stems from flue gas generated in the whole process of electricity generation. However, the complexity and nondeterminism of the environment increase the occurrences of anomalies in practical flue gas desulphurization system. Anomalies in industrial desulphurization system would induce severe consequences and pose challenges for high-performance control with classical control strategies. In this article, based on process data sampled from 1000 MW unit flue gas desulphurization system in a coal-fired power plant, a multimodel control strategy with multilayer parallel dynamic neural network (MPDNN) is utilized to address the control problem in the context of different anomalies. In addition, simulation results indicate the applicability and effectiveness of the proposed control method by comparing with different cases.

show abstract

Study on the Relationship between Absorbed S(IV) and pH in the Seawater Flue Gas Desulfurization Process

Cited by 12 publications

References 28 publications

Se‐catalyzed process of sodium bisulfite disproportionation

Se‐catalyzed process of sodium bisulfite disproportionation

Impact of variables on efficiency of flue gas desulphurisation plant in Longannet Power Station (ScottishPower)

Multimodel Anomaly Identification and Control in Wet Limestone-Gypsum Flue Gas Desulphurization System

Contact Info

Product

Resources

About