High performance of Fe nanoparticles/carbon aerogel sorbents for H2S Removal

Tian, Hua; Wu, Jiang; Zhang, Wenbo; Yang, Siyuan; Li, Fangqin; Qi, Yongfeng; Zhou, Ruixing; Qi, Xiaoqiong; Zhao, Lili; Wang, Xiaojun

doi:10.1016/j.cej.2016.10.135

Cited by 56 publications

(12 citation statements)

References 42 publications

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“…It has been before that Fe 3 O 4 has a better H 2 S uptake performance relative to Fe 2 O 3 , 59 and iron has also been proposed to be used as a successful H 2 S sorbent. 60,61 No iron signal was seen in the XRD pattern of sample CM5 after H 2 S uptake, which also points toward the high reactivity of iron formed in the composite. We see this positive synergy, where the net composite effect is higher than the sum of the individual effects, happen in a relatively short range of iron content on OPC, which happens to be where samples CM4 and CM5 lie.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Ling¹,

Gangoli²,

Barron

2019

Energy Fuels

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Developing an efficient hydrogen sulfide (H2S) sorbent is of great importance to natural gas industries, biomedical applications, and environmental conservation. Activated carbon, metal oxides, and their composite materials show potential for desulfurization. This work explores the synergic effects in composites of iron oxide (Fe2O3) and oxygenated porous carbon (OPC) for the removal of H2S at room temperature. Two types of Fe2O3-OPC composite samples were prepared: physically mixed (PM) and chemically mixed (CM). The two types of composites were tested for H2S uptake performance at ambient conditions, and a systematic study of the synergic effects of Fe2O3 and OPC was performed. Thorough characterization and analysis were used to reveal detailed structural and compositional properties of these samples. The CM sample with the best uptake capacity was also tested further for the desulfurization rate and the mechanism of action. The PM samples showed a lower H2S uptake capacity within 24 h compared to the theoretical value for the Fe2O3 and OPC working independently, indicating a negative synergic effect. The CM samples reached a maximum uptake capacity higher than the components working independently and importantly an increased rate of H2S uptake, which indicates positive synergy, showing potential in applications where rapid adsorption is required.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Ling¹,

Gangoli²,

Barron

2019

Energy Fuels

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“…Various oxides or metals can be dispersed in the carbon aerogel matrix to design and tailor the chemistry toward the catalytic reactions. Therefore, carbon aerogels are frequently studied as an outstanding support material for catalyst , , , , , , . For example, Liu et al fabricated CeVO 4 /3D reduced graphene oxide aerogel/BiVO 4 (CeVO 4 /RGO/BiVO 4 ) ternary composites and used them as photocatalysts for tetracycline (TC) degradation under visible light irradiation.…”

Section: Applications Based On Catalysismentioning

confidence: 99%

“…carbon aerogels are considered as an attractive support for HGD catalysts due to their excellent physicochemical property as well as their stability under high temperature and no need for any other pretreatment. Tian et al fabricated a desulfurizer with Fe nanoparticles and carbon aerogels and investigated its H 2 S removal efficiency in hot coal gas. The characterization results indicated that Fe NPs were highly dispersed on the surface of carbon aerogels, and the resultant Fe/CA‐700 exhibited a high sulfur adsorption capacity of 12.54 g/100 g in hot coal gas under the 600 °C.…”

Section: Applications Based On Catalysismentioning

confidence: 99%

Carbon Aerogels for Environmental Clean‐Up

Gan

Fan

et al. 2019

Eur J Inorg Chem

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Carbon aerogels are a fascinating three-dimensional (3D) monolithic porous material with remarkable physicochemical properties, including low density, large surface area, abundant pore structure, high electrical conductivity, chemical stability, environmental compatibility, adjustable surface chemistry, as well as controllable structural features. These properties endow carbon aerogels with excellent adsorption and catalytic performance. Therefore, they are widely applied in environmental chemistry for removing pollutants like oils, toxic organic solvents, dyes, heavy metal ions in aquatic environments, and vol- [a] Minireview Carbon aerogels show wonderful adsorption and catalytic performance because of the microscopic properties of carbon nanomaterials and the macroscopic structure of the gel. In addi-Guoqiang Gan received his master′s degree in 2016, and since then, he has studied environmental engineering at Dalian University of

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“…Carbon materials [ 14 , 15 , 16 ], natural aluminosilicates [ 17 , 18 ] semi-coke [ 19 , 20 ], nonmetallic oxides [ 21 , 22 , 23 ] and other materials [ 24 ] were studied as the complex, multicomponent H 2 S sorbents. Among impregnated sorbents, active phases often consist of simple metal oxides [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of a Support on the Properties of Zinc Oxide Based Sorbents

et al. 2021

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We present the comparative analysis of three Zn-based sorbents for the process of sulphur removal from hot coal gas. The sorbents were prepared by a slurry impregnation of TiO2, SiO2 and Al2O3, resulting in complex, multiphase materials, with the dominant phases of Zn2TiO4, Zn2SiO4 and ZnAl2O4, respectively. We have analyzed the effect of supports on the phase composition, texture, reducibility and H2S sorption. We have found that the phase composition significantly influences the susceptibility of the investigated materials to reduction by hydrogen. Zn2TiO4 have been found to be the easiest to reduce which correlates with its ability to adsorb the largest amount of hydrogen sulphide—up to 4.2 gS/100 g—compared to the other sorbents, which absorb up to 2.2 gS/100 g. In the case of Zn2SiO4 and ZnAl2O4, this effect also correlates with reducibility—these sorbents have been found to be highly resistant to reduction by hydrogen and to absorb much less hydrogen sulphide. In addition, the capacity of ZnAl2O4 for H2S adsorption decreases in the subsequent work cycles—from 2.2 gS/100 g in the first cycle to 0.8 gS/100 g in the third one. Computational analysis on the DFT level has shown that these materials show different thermodynamic stability of sulphur sites within the unit cells of the sorbents. For Zn2TiO4 and Zn2SiO4, the adsorption is favorable in both the first and second layers of the former and only the top layer of the latter, while for zinc aluminate it is not favorable, which is consistent with the experimental findings.

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High performance of Fe nanoparticles/carbon aerogel sorbents for H2S Removal

Cited by 56 publications

References 42 publications

Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Carbon Aerogels for Environmental Clean‐Up

Effect of a Support on the Properties of Zinc Oxide Based Sorbents

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High performance of Fe nanoparticles/carbon aerogel sorbents for H2S Removal

Cited by 56 publications

References 42 publications

Synergic Adsorption of H2S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Synergic Adsorption of H2S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Carbon Aerogels for Environmental Clean‐Up

Effect of a Support on the Properties of Zinc Oxide Based Sorbents

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Product

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Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature

Synergic Adsorption of H₂S Using High Surface Area Iron Oxide–Carbon Composites at Room Temperature