Insights into the effect of regeneration temperature on physicochemical properties and SO2 removal over powdered activated coke

Li, Jun; Zhang, Liqiang; Zhao, Xinbing; Zhang, Mengze; Feng, Tai; Zhou, Binxuan; Wang, Tao; Song, Zhanlong; Ma, Chunyuan

doi:10.1016/j.fuel.2020.119715

Cited by 13 publications

(8 citation statements)

References 37 publications

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“…Notably, many researchers have tested the adsorption and regeneration performances of activated carbon for SO 2 . 13 , 57 , 58 …”

Section: Resultsmentioning

confidence: 99%

“…The sulfur capacity of TAIL/SiO 2 is 89.36 mg/(g TAIL/SiO 2 ), while that of “Zhuxi” and “Sinopharm” activated carbons is only 30.94 mg/(g AC) and 16.63 mg/(g AC) respectively. Notably, many researchers have tested the adsorption and regeneration performances of activated carbon for SO 2 . ,, …”

Section: Resultsmentioning

confidence: 99%

“…Notably, many researchers have tested the adsorption and regeneration performances of activated carbon for SO 2 . 13,57,58 Table 3 shows the SO 2 adsorption capacities of the different activated carbons and supported ionic liquids. The results of this study show that the sulfur capacity of TAIL/SiO 2 prepared is better than that of activated carbon and some supported ILs.…”

Section: Effect Of Moisture Content On Adsorptionmentioning

confidence: 99%

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SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

et al. 2022

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Ionic liquid desulfurization is an effective method for achieving green and circulating desulfurization. To overcome the negative impact of the high viscosity of ionic liquids on the desulfurization process, an economical and efficient supported ionic liquidtriethanolamine acetate ionic liquid/silica (TAIL/SiO2) was prepared in this study. TAIL is synthesized using triethanolamine and acetic acid and subsequently loaded onto silica gel particles. The effects of the reaction temperature, humidity, silica particle size, and loading ratio on SO2 adsorption are investigated using a fixed-bed reactor. The results indicate that the surface of the silica gel loaded with ionic liquid formed uneven spherical clusters, and the aggregate volume increased with an increase in the loading ratio. The TAIL/SiO2 sulfur capacity could be effectively increased by increasing the loading ratio (exceeding 0.74 is unfavorable), decreasing the silica particle size, and reducing the reaction temperature and moisture content. The maximum sulfur capacity can reach 124.98 mg SO2/(g TAIL/SiO2) under experimental conditions, which is higher than that of activated carbon. The Bangham rate model effectively predicts the kinetics of the adsorption process of SO2.

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“…Notably, many researchers have tested the adsorption and regeneration performances of activated carbon for SO 2 . 13 , 57 , 58 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Moisture Content On Adsorptionmentioning

confidence: 99%

See 1 more Smart Citation

SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

et al. 2022

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“…The effect of regeneration temperature on SO 2 adsorption is consistent with previous studies. 21 The regeneration at 400 °C was incomplete, and the accumulation of SO 4 2− and the increase of oxygen-containing functional groups on the surface of AC both hindered SO 2 removal.…”

Section: Confirming the Promotional Effect Of Regeneration On Scr Act...mentioning

confidence: 99%

“…19,20 It is widely accepted that H 2 SO 4 is the end product of the desulfurization process over carbon when O 2 and H 2 O coexist and gradually accumulates in the pores. 21,22 Obviously, regeneration plays a crucial role in the long-term operation of an integrated removal system. 12,23 Li et al investigated the impact of the cyclic desulfurization and regeneration (C-S−R) process on denitration performance and proposed that the enhanced SCR activity could be attributed to the increase in O-containing groups.…”

Section: Introductionmentioning

confidence: 99%

In Situ S-Doping Engineering for Highly Efficient NH₃–SCR over Metal-Free Carbon Catalysts: A Novel Synergetic Promotional Mechanism

Zhu,

Yuan,

Peng

et al. 2023

Environ. Sci. Technol.

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Cyclic desulfurization−regeneration−denitrification based on metal-free carbon materials is one of the most promising ways to remove NO x and SO 2 simultaneously. However, the impact of S-doping induced by the cyclic desulfurization and regeneration (C-S−R) process on the selective catalytic reduction (SCR) is not well understood. Herein, it is demonstrated that the C-S−R process at 500 °C induces in situ S-doping with a significant accumulation of C−S−C structures. NO x conversion was dramatically enhanced from 18.95% of the original sample to 84.55% of the S-doped sample. Density functional theory calculations revealed that the C−S−C structure significantly regulates the electronic structure of the C atom adjacent to the ketonic carbonyl group, thereby significantly altering the NH 3 adsorption configuration with superior adsorption capacity. Moreover, Sdoping induces an extra electron transfer between the N atom of the NH 3 molecule and the C atom of the carbon plane, thereby promoting the activation of NH 3 over the ketonic carbonyl group with a reduced energy barrier. This study elucidates a synergetic promotional mechanism between the ketonic carbonyl group and the C− S−C structure for SCR, offering a novel design strategy for high-performance heteroatom-doped carbon catalysts in industrial applications.

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NH2-MIL-125 filled mixed matrix membrane contactor with SO2 enrichment for flue gas desulphurization

Xin

Ding

et al. 2022

Chemical Engineering Journal

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Insights into the effect of regeneration temperature on physicochemical properties and SO2 removal over powdered activated coke

Cited by 13 publications

References 37 publications

SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

In Situ S-Doping Engineering for Highly Efficient NH₃–SCR over Metal-Free Carbon Catalysts: A Novel Synergetic Promotional Mechanism

NH2-MIL-125 filled mixed matrix membrane contactor with SO2 enrichment for flue gas desulphurization

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Insights into the effect of regeneration temperature on physicochemical properties and SO2 removal over powdered activated coke

Cited by 13 publications

References 37 publications

SO2 Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

SO2 Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

In Situ S-Doping Engineering for Highly Efficient NH3–SCR over Metal-Free Carbon Catalysts: A Novel Synergetic Promotional Mechanism

NH2-MIL-125 filled mixed matrix membrane contactor with SO2 enrichment for flue gas desulphurization

Contact Info

Product

Resources

About

SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

SO₂ Adsorption and Kinetics Analysis during Supported Triethanolamine Acetate Ionic Liquid Desulfurization

In Situ S-Doping Engineering for Highly Efficient NH₃–SCR over Metal-Free Carbon Catalysts: A Novel Synergetic Promotional Mechanism