Sorptive removal of phosphorus by flue gas desulfurization gypsum in batch and column systems

Hamid, Ansley; Wilson, Alan E.; Torbert, H. Allen; Wang, Dengjun

doi:10.1016/j.chemosphere.2023.138062

Cited by 13 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In China, the yields of FGDG had increased from 80 million tons in 2013 to 161 million tons in 2021, while its use ratio had decreased from 91.7% in 2013 to 65% in 2021 (see Figure ). The use ratio of FGDG in the United States also was decreased from 79% in 2006 to 57% in 2016, even though researchers have done a lot of work on FGDG utilization, such as FGDG phosphorus removal . The problem of excess FGDG remains serious.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Xie,

Wang,

Liu

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Highly efficient and low-energy SO 2 capture technology is a key measure to control SO 2 pollution and sulfur supply side and demand-side balancing. This paper reviews the current development of SO 2 capture technology by chemical absorption from two aspects of absorbent and process enhancement. The SO 2 absorption mechanism of various absorbents are first described, and it was divided into aqueous solvents and nonaqueous solvents. Four prediction models for the SO 2 absorption capacity of different absorbents are proposed, providing an effective tool for the selection of efficient and low-energy absorbents. The advantages, bottlenecks, and development directions of each absorbent are analyzed. The diversity of organic amines provides a possibility for enhancing the market competitiveness of organic amine aqueous solutions in aqueous solvents, while the high energy consumption in the absorbent regeneration process is a disadvantage. The ionic amino acid aqueous solution reduces the volatilization of the effective components of the absorbent and has better SO 2 absorption potential than the organic amine aqueous solution. The greatest advantage of the nonaqueous solvents is the avoidance of ineffective latent heat consumption. High-throughput screening has become a bridge for the application of aqueous and nonaqueous solvents to industrial SO 2 capture processes. Finally, the application potential of a process intensification strategy in SO 2 capture technology is discussed, in which solvent intensification can avoid latent heat consumption, equipment intensification can improve the efficiency of gas−liquid mass transfer and process matching can recover the available energy of SO 2 capture system. The comprehensive evaluation of SO 2 capture process based on various absorbents is the primary task to promote the development of promising absorbents. It is hoped that this paper can provide reference for the development of SO 2 capture processes.

show abstract

Section: Introductionmentioning

confidence: 99%

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Xie,

Wang,

Liu

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Previous studies reported that the direct application of FGD gypsum to agricultural soils could reduce P losses to surrounding watersheds (King et al., 2016; Torbert & Watts, 2014; Watts & Torbert, 2016). In addition, FGD gypsum has also been used as a Ca‐based PSM to remove excess P from nutrient‐containing water (Bryant et al., 2012; Cheng et al., 2018; Hamid et al., 2023). Unlike Fe or Al‐based PSMs, Ca or other metals released from gypsum are usually below levels of concern or not toxic to the ecological environment (Torbert et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

Enhancing dissolved inorganic phosphorous capture by gypsum‐incorporated biochar: Synergic performance and mechanisms

et al. 2023

View full text Add to dashboard Cite

Excess nutrients such as phosphorus (P) in watersheds jeopardize water quality and trigger harmful algal blooms. Using phosphorus sorption material (PSM) to capture P from wastewater and agricultural runoff can help recover nutrients and prevent their water pollution. In this study, a novel designer biochar was generated by pyrolyzing woody biomass pretreated with a flue gas desulfurization gypsum. The removal of dissolved inorganic phosphorus (DIP) by the gypsum‐incorporated designer biochar was more efficient than the gypsum, suggesting the pretreatment of biomass with the gypsum results in a synergic effect on enhancing DIP capture. The maximum P adsorption capacity of the designer biochar was more than 200 mg g−1, which is one order of magnitude greater than that of the gypsum. This result clearly showed that the designer biochar is a better PSM to capture DIP from nutrient‐contaminated water compared to the gypsum. Post‐sorption characterization indicated that the sorption of DIP by the gypsum‐incorporated biochar involves multiple mechanisms. The precipitation reactions of Ca cations and P anions to form CaHPO4 and Ca3(PO4)2 precipitates on the highly alkaline surface of the designer biochar were identified as a main mechanism. By contrast, CaHPO4·2H2O is the only precipitated product for DIP sorption by the gypsum. In addition, the initial solution pH and the coexisting bicarbonate had less effects on the DIP removal by the designer biochar in comparison with the gypsum, which further confirms the former is an excellent PSM to capture DIP from a variety of aquatic media.This article is protected by copyright. All rights reserved

show abstract

“…FGD gypsum can be a product that has many applications in different industries. It is used in agriculture [ 9 , 10 ], civil engineering [ 11 , 12 ], water treatment [ 13 ], sorption of phosphorus ions [ 14 ] and the glass industry [ 2 ]. FGD gypsum is widely applied in the construction industry as a setting retarder in Portland cement [ 8 , 15 , 16 , 17 ], for producing calcium sulphoaluminate cement [ 18 ], as high-strength building materials [ 19 ] and as a component of gypsum plaster [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Compressive Strength of Anhydrite Binder Using Full Factorial Design

Nizevičienė,

Kybartienė,

Jusas

2023

Materials

View full text Add to dashboard Cite

Flue gas desulfurization gypsum (FGD gypsum) is obtained from the desulphurization of combustion gases in fossil fuel power plants. FGD gypsum can be used to produce anhydrite binder. This research is devoted to the investigation of the influence of the calcination temperature of FGD gypsum, the activators K2SO4 and Na2SO4, and their amount on the compressive strength of anhydrite binder during hydration. The obtained results showed that as the calcination temperature increased, the compressive strength of anhydrite binder decreased at its early age (up to 3 days) and increased after 28 days. The compressive strength of the anhydrite binder produced at 800 °C and 500 °C differed more than five times after 28 days. The activators K2SO4 and Na2SO4 had a large effect on the hydration of anhydrite binder at its early age (up to 3 days) in comparison with the anhydrite binder without activators. The presence of the activators of either K2SO4 or K2SO4 almost had no influence on the compressive strength after 28 days. To determine which factor, the calcination temperature of FGD gypsum (500–800 °C), the hydration time (3–28 days) or the amount (0–2%) of the activators K2SO4 and Na2SO4, has the greatest influence on the compressive strength, a 23 full factorial design was applied. Multiple linear regression was used to develop a mathematical model and predict the compressive strength of the anhydrite binder. The statistical analysis showed that the hydration time had the strongest impact on the compressive strength of the anhydrite binder using activators K2SO4 and Na2SO4. The activator K2SO4 had a greater influence on the compressive strength than the activator Na2SO4. The obtained mathematical model can be used to forecast the compressive strength of the anhydrite binder produced from FGD gypsum if the considered factors are within the same limiting values as in the suggested model since the coefficient of determination (R2) was close to 1, and the mean absolute percentage error (MAPE) was less than 10%.

show abstract

Sorptive removal of phosphorus by flue gas desulfurization gypsum in batch and column systems

Cited by 13 publications

References 42 publications

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

Enhancing dissolved inorganic phosphorous capture by gypsum‐incorporated biochar: Synergic performance and mechanisms

Analysis of Compressive Strength of Anhydrite Binder Using Full Factorial Design

Contact Info

Product

Resources

About

Sorptive removal of phosphorus by flue gas desulfurization gypsum in batch and column systems

Cited by 13 publications

References 42 publications

An Overview of Flue Gas SO2 Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO2 Capture Technology Based on Absorbent Evaluation and Process Intensification

Enhancing dissolved inorganic phosphorous capture by gypsum‐incorporated biochar: Synergic performance and mechanisms

Analysis of Compressive Strength of Anhydrite Binder Using Full Factorial Design

Contact Info

Product

Resources

About

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification

An Overview of Flue Gas SO₂ Capture Technology Based on Absorbent Evaluation and Process Intensification