Selective capture of trace sulfur gas by porous covalent-organic materials

Wang, Hui; Zeng, Xiaofei; Wang, Wenchuan; Cao, Dapeng

doi:10.1016/j.ces.2015.02.015

Cited by 27 publications

(6 citation statements)

References 47 publications

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“…H2S adsorption capacities at lower pressure are also listed here since the adsorption capacities of some MOFs can vary significantly with pressure. For example, the H2S adsorption capacity of COF-6 decreased by 87.5% when the pressure of H2S was reduced from 1 bar to 0.1 bar [109]. By contrast, there was only 24.3% decrease in H2S adsorption capacity for MIL-47(V)-Br with the same pressure differential [110].…”

Section: H2s Adsorption Capacities Of Mof Using Pure H2smentioning

confidence: 95%

“…Figure 12 summarises H2S adsorption capacity of MOFs using pure H2S at 1 bar and 0.1 bar from references [99][100][101][102][103][104][105][106][107][108][109][110][111][112]. These data are from papers reporting H2S adsorption isotherms at different temperatures and pressures.…”

Section: H2s Adsorption Capacities Of Mof Using Pure H2smentioning

confidence: 99%

“…Figure 12. Adsorption capacities of MOF materials using pure H2S at different partial pressures and temperatures from references[99][100][101][102][103][104][105][106][107][108][109][110][111][112] …”

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confidence: 99%

See 2 more Smart Citations

Porous materials for low-temperature H2S-removal in fuel cell applications

Mao¹,

Griffin²,

Dawson³

et al. 2021

Separation and Purification Technology

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Section: H2s Adsorption Capacities Of Mof Using Pure H2smentioning

confidence: 95%

Section: H2s Adsorption Capacities Of Mof Using Pure H2smentioning

confidence: 99%

See 1 more Smart Citation

Porous materials for low-temperature H2S-removal in fuel cell applications

Mao¹,

Griffin²,

Dawson³

et al. 2021

Separation and Purification Technology

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“…Many researchers found that COFs can be used as promising gas storage, − separation, − catalysis, − and drug delivery materials . Previous studies have demonstrated that COFs have excellent separation performance for CH 4 /H 2 , CO 2 /N 2 , and CO 2 /H 2 , etc. − …”

Section: Introductionmentioning

confidence: 99%

Identifying Promising Covalent-Organic Frameworks for Decarburization and Desulfurization from Biogas via Computational Screening

Wang

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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Efficient removal of hydrogen sulfide and carbon dioxide is essential for biogas purification, which is still a longstanding challenge economically and environmentally. Recently, covalent-organic frameworks (COFs) have become competitive candidates for acid gases capture. In this study, high-throughput computational screening of a database containing 382 computation-ready experimental COFs were employed to establish structure-performance relationships and to identify the topperforming materials for H 2 S and CO 2 separation from biogas (H 2 S/CO 2 /CH 4 ) under dry operating conditions. By using adsorbent performance score and the sorbent selection parameter as evaluation metrics, the calculated results show that the best material is significantly better than many benchmark materials reported so far. Further, we investigated the adsorption and separation performance of the modified materials in sulfur and carbon capture from ternary gas mixtures. The results indicated that the existence of favorable organic linkers and micro pores played a significant role in promoting the adsorption of H 2 S and CO 2 . This work is anticipated to provide a useful guidance for the design of new materials with high performance for decarburization and desulfurization from biogas.

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“…In addition, H 2 S can deactivate catalysts in the industrial chemical processes, including the desulfurization processes. Over the years as countries developed and industrialized, the production of H 2 S as a byproduct increased significantly and countries started to introduce stricter legislation (ACT No 39 of 2004) on the H 2 S emission limits to protect the environment and human beings. , Therefore, the introduction of the stricter legislation forced industries to start investigating methods and commercial processes (Claus, Unisulf, Lo-Cat, Hiperion Iron oxide box, Ferrox, Fischer, Thylox, Sulfolin, South African modified Sulfolin to Stretford technology, ,, and many others) that can recover H 2 S from the H 2 S-containing gas streams (coal gasification off-gases, refinery gases, sour gases, and natural gases), − , and convert it into the elemental sulfur. − The utilization of the sulfur recovery processes is necessary to minimize its impact on plant equipment corrosion, human health, and environmental issues that are associated with the H 2 S gas.…”

Section: Introductionmentioning

confidence: 99%

Effect of the V⁵⁺ to V⁴⁺ Molar Ratio on H₂S Absorption and Conversion to Elemental Sulfur

Ndou

Matjie

Mahlamvana

et al. 2021

Ind. Eng. Chem. Res.

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This study assessed V5+ concentration and V5+ to V4+ ratio effects on the H2S absorption and oxidation to elemental sulfur from H2S gas streams in simulated Stretford solutions. Laboratory-derived sulfur products were characterized by inductively coupled plasma optical emission spectrometry, X-ray diffraction (XRD), particle size distribution (PSD), and differential scanning calorimeter (DSC) analyses for probing the chemical, mineralogical, and physical properties of the sulfur products. H2S absorption and sulfur production efficiencies increase with an increase in the V5+ concentration. However, the sulfur’s PSD results are finer and the purity decreases as the V5+ concentration increases because of K/Al/Si/Mg/Fe impurities in the added technical grade sodium ammonium vanadate (SAV) to the Stretford solution. XRD and DSC results of the orthorhombic sulfur (α-S8) products indicate that these products have similar mineralogical properties and melting points compared to those of the commercial α-S8. V5+ to V4+ ratios decreased with a decrease in α-S8 production efficiency, and a total vanadium loss of 89% was achieved because of the V4+ precipitation from the Stretford solution without disodium salt of 2,6 and 2,7 isomers of anthraquinone-disulphonic acid (Na2[ADA]). Low V5+ to V4+ ratios were found to be responsible for the sulfur sol formation and subsequent dark-colloidal V4+ and fine α-S8 precipitation in the Stretford units. The Stretford process must be operated with Na2[ADA] for the V4+ oxidation in the solutions. Research outcomes as well as the total replacement for SAV with a pure V5+ salt can assist the Stretford operators to further improve α-S8 quality and its production efficiency.

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Selective capture of trace sulfur gas by porous covalent-organic materials

Cited by 27 publications

References 47 publications

Porous materials for low-temperature H2S-removal in fuel cell applications

Porous materials for low-temperature H2S-removal in fuel cell applications

Identifying Promising Covalent-Organic Frameworks for Decarburization and Desulfurization from Biogas via Computational Screening

Effect of the V⁵⁺ to V⁴⁺ Molar Ratio on H₂S Absorption and Conversion to Elemental Sulfur

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Selective capture of trace sulfur gas by porous covalent-organic materials

Cited by 27 publications

References 47 publications

Porous materials for low-temperature H2S-removal in fuel cell applications

Porous materials for low-temperature H2S-removal in fuel cell applications

Identifying Promising Covalent-Organic Frameworks for Decarburization and Desulfurization from Biogas via Computational Screening

Effect of the V5+ to V4+ Molar Ratio on H2S Absorption and Conversion to Elemental Sulfur

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Effect of the V⁵⁺ to V⁴⁺ Molar Ratio on H₂S Absorption and Conversion to Elemental Sulfur