High temperature H2S removal via CO2-assisted chemical looping over ZrO2-modified Fe2O3

Hu, Jiawei; Poelman, Hilde; Theofanidis, Stavros Alexandros; Joos, Jonas; Detavernier, Christophe; Poelman, Dirk; Wei, Wei; Galvita, Vladimir

doi:10.1016/j.apcatb.2023.122591

Cited by 6 publications

(1 citation statement)

References 58 publications

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“…COS and H 2 S are well-known sulfur-containing substances that seriously impact the atmosphere, cause acid rain, endanger human health, and contribute to global climate change. − Blast furnace gas (BFG) is one of the three gas byproducts generated by the iron and steel industry. Due to its large output and low calorific value (about 3500 kJ/m 3 ), BFG is usually directly discharged.…”

Section: Introductionmentioning

confidence: 99%

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N

Li,

Wang,

Yuan

et al. 2024

Environ. Sci. Technol.

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Economic and environmentally friendly strategies are needed to promote the bifunctional catalytic removal of carbonyl sulfide (COS) by hydrolysis and hydrogen sulfide (H 2 S) by oxidation. N doping is considered to be an effective strategy, but the essential and intrinsic role of N dopants in catalysts is still not well understood. Herein, the conjugation of urea and biochar during Cu/biochar annealing produced pyridine N, which increased the combined COS/H 2 S capacity of the catalyst from 260.7 to 374.8 mg•g −1 and enhanced the turnover frequency of H 2 S from 2.50 × 10 −4 to 5.35 × 10 −4 s −1 . The nucleophilic nature of pyridine N enhances the moderate basic sites of the catalyst, enabling the attack of protons and strong H 2 O dissociation. Moreover, pyridine N also forms cavity sites that anchor CuO, improving Cu dispersion and generating more reactive oxygen species. By providing original insight into the pyridine N-induced bifunctional catalytic removal of COS/H 2 S in a slightly oxygenated and humid atmosphere, this study offers valuable guidance for further C�S and C−S bond-breaking in the degradation of sulfur-containing pollutants.

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Section: Introductionmentioning

confidence: 99%

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N

Li,

Wang,

Yuan

et al. 2024

Environ. Sci. Technol.

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Chemical Looping: At the Forefront of Green Transformation

Buelens,

Poelman,

Galvita

2024

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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Deposition and release behavior of H2S during chemical looping hydrogen production process

Turap,

Zhang,

Wang

et al. 2024

Chemical Engineering Journal

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High temperature H2S removal via CO2-assisted chemical looping over ZrO2-modified Fe2O3

Cited by 6 publications

References 58 publications

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N

Chemical Looping: At the Forefront of Green Transformation

Deposition and release behavior of H2S during chemical looping hydrogen production process

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High temperature H2S removal via CO2-assisted chemical looping over ZrO2-modified Fe2O3

Cited by 6 publications

References 58 publications

Cu/Biochar Bifunctional Catalytic Removal of COS and H2S:H2O Dissociation and CuO Anchoring Enhanced by Pyridine N

Cu/Biochar Bifunctional Catalytic Removal of COS and H2S:H2O Dissociation and CuO Anchoring Enhanced by Pyridine N

Chemical Looping: At the Forefront of Green Transformation

Deposition and release behavior of H2S during chemical looping hydrogen production process

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Product

Resources

About

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N

Cu/Biochar Bifunctional Catalytic Removal of COS and H₂S:H₂O Dissociation and CuO Anchoring Enhanced by Pyridine N