Summary of research progress on industrial flue gas desulfurization technology

Li, Xueke; Han, Jin-ru; Liu, Yan; Zhang, Dou; Zhang, Ting‐an

doi:10.1016/j.seppur.2021.119849

Cited by 133 publications

(42 citation statements)

References 174 publications

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“…Sulfur dioxide (SO 2 ), which is one of the major harmful gases causing air pollution, is inevitably produced in the smelting process of metals such as zinc, lead, copper, nickel, and steel [1] , [2] . The preparation of industrial byproduct sulfuric acid (H 2 SO 4 ) from sulfur dioxide by flue gas desulfurization is an important way to realize the comprehensive recovery of sulfur resources and environmental emission in the metal smelting industry, which has great economic and social benefits [3] .…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Ravindra

et al. 2022

Ultrasonics Sonochemistry

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Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Ravindra

et al. 2022

Ultrasonics Sonochemistry

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“…Development so far, dozens of desulfurization technologies have been reported worldwide. According to its development history, it can be divided into traditional desulfurization technologies, such as wet (Li et al, 2022), semidry (Liu et al, 2021), and dry desulfurization (Ding et al, 2019), and current mainstream technologies, such as gas-phase reduction and liquid-phase reduction (Raymundo-Pinero et al, 2000;Mentzen et al, 2010;Bejarano et al, 2001;Chambers and Trudinger, 1975;Kline et al, 1987;Tolmachev and Scherson, 1999). Although these technologies are widely employed in the raw coal treatment and waste tire disposal industry, they have obvious drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the occurrence characteristics of organic components in high-sulfur waste residues (HSWR)

Wang

Jie²,

Li³

et al. 2022

Front. Environ. Sci.

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High-sulfur waste residues (HSWR) is a typical byproduct produced in the printing and dyeing industry that has hazardous properties, such as flammability and reactivity, etc. It is of great significance for the directional and harmless treatment of waste residues in the later stage on the research in-depth of the occurrence characteristics of each component in HSWR. In this paper, the combinatorial analysis method is employed to perform in-depth research on the phase composition, surface chemical situation of element, and the occurrence state of functional groups of the waste residue from multiple perspectives. The results show that the organic and inorganic components in HSWR are intricately interwoven, and exhibit significant thermal instability at high temperatures, with a maximum weight less of 86.66%. Carbon mainly exists in the states of C-H/C-OH/C-C, C-O/C-NH2, and C=O/C-N/C-S/CHx and constitutes the main chain of the carboxylic ring. Sulfur mainly occurs in three forms, namely, amorphous aggregated sulfur, sulfur-containing inorganic salts such as sulfate, and nitrogen-heterocyclic organic compounds containing sulfhydryl groups and methyl sulfur groups. These organic compounds constitute branch chains of the organic phase, and combine with metal cations through hydroxyl or carboxyl groups, and deposit on the surface of inorganic agglomerated sulfur. This wrapping structure increases the stability of volatile compounds in the slag and increases the difficulty of sulfur and chlorine removal. These findings provide a material basis for the later development of safe and effective HSWR disposal techniques.

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“…Currently, approximately 85% of power plant desulfurization occurs via a wet limestone–gypsum process which has a high desulfurization rate and a low cost of operation. ,, This process requires waste water treatment, and while gypsum (formed as a by-product) has a number of applications such as in wallboard manufacturing and the cement industry, globally, a large proportion goes to landfill. , The efficiency of such desulfurization processes (and other purification stages) before CCS (Carbon Capture and Storage) significantly impacts the sorbent lifetime and the overall process efficiency and cost.…”

Section: Introductionmentioning

confidence: 99%

“…[P 66614 ][Superbase] was prepared using a previously reported two-step synthesis method. 27 The structure and purity of the ILs, after synthesis and post-exposure, were analyzed using 1 H NMR and 13 C NMR with a Bruker AVANCE II 500 MHz Ultra shield Plus spectrometer and carried out as neat ILs in the presence of a glass capillary insert containing DMSO-d 6 , purchased from Cambridge Isotope Laboratories Inc. (CAS: 2206-27-1). The halide content was determined to be <5 ppm using a silver nitrate test, and water content was measured to be <0.1 wt % using a Metrohm 787 KF Titrino Karl Fischer machine.…”

Section: ■ Introductionmentioning

confidence: 99%

Combined Superbase Ionic Liquid Approach to Separate CO₂ from Flue Gas

Greer

Taylor

Daly

et al. 2022

ACS Sustainable Chem. Eng.

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Superbase ionic liquids (ILs) with a trihexyltetradecylphosphonium cation and a benzimidazolide ([P 66614 ][Benzim]) or tetrazolide ([P 66614 ][Tetz]) anion were investigated in a dual-IL system allowing the selective capture and separation of CO 2 and SO 2 , respectively, under realistic gas concentrations. The results show that [P 66614 ][Tetz] is capable of efficiently capturing SO 2 in preference to CO 2 and thus, in a stepwise separation process, protects [P 66614 ][Benzim] from the negative effects of the highly acidic contaminant. This results in [P 66614 ][Benzim] maintaining >53% of its original CO 2 uptake capacity after 30 absorption/desorption cycles in comparison to the 89% decrease observed after 11 cycles when [P 66614 ][Tetz] was not present. Characterization of the ILs post exposure revealed that small amounts of SO 2 were irreversibly absorbed to the [Benzim] − anion responsible for the decrease in CO 2 capacity. While optimization of this dual-IL system is required, this feasibility study demonstrates that [P 66614 ][Tetz] is a suitable sorbent for reversibly capturing SO 2 and significantly extending the lifetime of [P 66614 ][Benzim] for CO 2 uptake.

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Summary of research progress on industrial flue gas desulfurization technology

Cited by 133 publications

References 174 publications

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Investigation of the occurrence characteristics of organic components in high-sulfur waste residues (HSWR)

Combined Superbase Ionic Liquid Approach to Separate CO₂ from Flue Gas

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Summary of research progress on industrial flue gas desulfurization technology

Cited by 133 publications

References 174 publications

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Ultrasonic-assisted ozone degradation of organic pollutants in industrial sulfuric acid

Investigation of the occurrence characteristics of organic components in high-sulfur waste residues (HSWR)

Combined Superbase Ionic Liquid Approach to Separate CO2 from Flue Gas

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Combined Superbase Ionic Liquid Approach to Separate CO₂ from Flue Gas