Sustainable recycling of titanium from TiO2 in spent SCR denitration catalyst via molten salt electrolysis

Bai, Xuyang; Shang, Xiaojia; Wan, Heli; Che, Yusi; Yang, Bin; He, Jilin; Song, Jianxun

doi:10.1016/j.jechem.2020.11.002

Cited by 24 publications

(8 citation statements)

References 39 publications

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“…100% decolourisation was attained even after the catalyst was used five times and it was monitored by UV-Visible spectroscopy. This demonstrates the high catalytic activity and photo stability of the photo catalysts [32][33][34] .…”

Section: Catalytic Recyclabilitymentioning

confidence: 69%

Solar Photocatalytic Degradation of Rhodamine-B Dye Using Lettuce Extracted TiO2 Nanoparticle

et al. 2022

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The present study describes the green synthesis of TiO2 nanoparticles using Sesbania Grandiflora and Solanum nigrum leaf extracts. The characterisation of synthesised nanoparticles is carried out using XRD and FTIR. The photo catalytic degradation of Rhodamine-B dye is carry out under sunlight irradiation by using UV- Vis spectrophotometer. Among the synthesized catalysts, SG/TiO2 was found to be the best for the photocatalytic degradation of dye. The degraded dye water is also tested for the water quality parameters and the results are discussed.

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Section: Catalytic Recyclabilitymentioning

confidence: 69%

Solar Photocatalytic Degradation of Rhodamine-B Dye Using Lettuce Extracted TiO2 Nanoparticle

et al. 2022

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“…The high-purity V 2 O 5 microrods were retrieved by a hydrothermal method from the low-grade filtrate that exhibited high hydrogen sulfide (H 2 S) removal performance. Bai et al 118 studied the conversion of TiO 2 obtained after the removal of impurities by a wet process to Ti 2 CO by carbothermal reduction, followed by further purification of Ti 2 CO by oleic acid capture and the deposition of high-purity Ti metal at the cathode as a consumable anode in molten potassium chloride salt. The authors achieved a conversion of low-grade TiO 2 between 60% and 99.5% to high-purity Ti metal from a spent catalyst.…”

Section: Recycling Of Spent Vanadium−titanium Scr Catalyst Carriers 3...mentioning

confidence: 99%

Section: Recycling Of Spent Vanadium–titanium Scr Catalystsmentioning

confidence: 99%

Strategy and Technical Progress of Recycling of Spent Vanadium–Titanium-Based Selective Catalytic Reduction Catalysts

Zhao,

Zhang,

Yang

et al. 2024

ACS Omega

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Selective catalytic reduction denitration technology, abbreviated as SCR, is essential for the removal of nitrogen oxide from the flue gas of coal-fired power stations and has been widely used. Due to the strong demand for energy and the requirements for environmental protection, a large amount of SCR catalyst waste is produced. The spent SCR catalyst contains high-grade valuable metals, and proper disposal or treatment of the SCR catalyst can protect the environment and realize resource recycling. This review focuses on the two main routes of regeneration and recycling of spent vanadium−titanium SCR catalysts that are currently most widely commercially used and summarizes in detail the technologies of recycling, high-efficiency recycling, and recycling of valuable components of spent vanadium−titanium SCR catalysts. This review also discusses in depth the future development direction of recycling spent vanadium−titanium SCR catalysts. It provides a reference for promoting recycling, which is crucial for resource recovery and green and lowcarbon development.

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“…Numerous studies on the extraction and purification of V from spent denitration catalysts have been carried out. , Currently, the common methods for extraction V from spent denitration catalysts include alkaline leaching, sodium roasting, and single-acid leaching . Among these methods, alkaline leaching is known for its high alkali consumption and wastewater generation, while sodium roasting causes high energy consumption .…”

Section: Introductionmentioning

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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Sustainable recycling of titanium from TiO2 in spent SCR denitration catalyst via molten salt electrolysis

Cited by 24 publications

References 39 publications

Solar Photocatalytic Degradation of Rhodamine-B Dye Using Lettuce Extracted TiO2 Nanoparticle

Solar Photocatalytic Degradation of Rhodamine-B Dye Using Lettuce Extracted TiO2 Nanoparticle

Strategy and Technical Progress of Recycling of Spent Vanadium–Titanium-Based Selective Catalytic Reduction Catalysts

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

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