Mesoporous carbons as metal-free catalysts for propane dehydrogenation: Effect of the pore structure and surface property

Hu, Zhong-Pan; Ren, Jin‐Tao; Yang, Dandan; Wang, Zheng; Yuan, Zhong‐Yong

doi:10.1016/s1872-2067(19)63334-6

Cited by 33 publications

(5 citation statements)

References 53 publications

(88 reference statements)

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“…Mesoporous carbon is one of the potential adsorbents used to adsorb some dyes because it has a size match. The results prove that mesoporous carbon has advantages over mesoporous silica, which is more resistant to heat, acids and bases, and mechanical stress [1]. Types of dyes that can be adsorbed include rhodamine B, methylene blue and carmine which have sizes close to the mesoporous diameter, so it possible to use mesoporous carbon adsorbents more effectively.…”

Section: Introductionmentioning

confidence: 78%

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Misriyani

Setianingsih

Darjito

2020

IJFAC

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Study of dyes adsorption (rhodamine B, methylene blue and carmine) carried out by using mesoporous carbon synthesized at various carbonization time. The purpose of this research was to understand influence of carbonization time to performance of the mesoporous carbon in dyes adsorption. In addition, adsorption performance of the mesoporous carbon and commercial carbon were compared. The adsorption test were conducted at conditions: 0.1 g of adsorbent, 25 mL of dyes solutions 100 ppm and shaking rate 125 rpm for 4 hour. Filtrate was used to determine remain concentration of the dyes with UV-visible spectrophotometry. Result of the research showed that the carbonization time from 1 to 3 hours improved the adsorption, whereas from 3 to 5 hours decreased it. The best character of the mesoporous carbon obtained at carbonization time of 3 hours with adsorption values of 96.43 ± 0.37 % for rhodamine-B, 38.80 ± 1.44 % for methylene blue and 48.51 ± 1.55 % for carmine. The adsorption values of the mesoporous carbon were 0.97 times for rhodamine B, 0.48 times for carmine, and 0.39 times for methylene blue compared with the commercial activated carbon.

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Section: Introductionmentioning

confidence: 78%

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Misriyani

Setianingsih

Darjito

2020

IJFAC

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“…Besides, 0.87 mg·g –1 coke can be measured on the spent catalyst surface. Given the fact that the dehydrogenation behaviors of carbon materials in light alkane have been reported, , the formed coke may be the active component for propane dehydrogenation. Therefore, we wonder whether the formed metallic Ge species, the deposited coke, or both can account for the dehydrogenation performance of the Ge/SiO 2 catalyst.…”

Section: Resultsmentioning

confidence: 99%

Novel Ge/SiO₂ Catalysts for Nonoxidative Dehydrogenation of Propane

Zhang,

Ma,

Zhao

et al. 2024

Energy Fuels

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This paper reports for the first time that the Ge/ SiO 2 catalyst can also exhibit dehydrogenation activity for propane dehydrogenation. This finding breaks our traditional wisdom about the part of Ge species playing in dehydrogenation of light alkanes. The study proves that metallic Ge and Ge suboxide species (such as Ge 2+ ) are regarded as the active species for propane dehydrogenation instead of a promoter for noble metal catalysts. These active Ge species can be formed during dehydrogenation reaction, and the formation rate can be accelerated through reduction pretreatment. Notably, the dispersion of the active Ge species does have a significant effect on the dehydrogenation performance, and the agglomeration of the active Ge species caused by the over-reduction leads to a fast deactivation of the Ge/SiO 2 catalyst.

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“…The catalytic activities are normally attributed to dopants introduced with various ex situ or in situ processes (25). For example, oxidized carbon materials have been investigated for gas-phase oxidative dehydrogenation of propane, and surface oxygen-containing functional groups are proposed as active centers (26). The introduction of nitrogen can also yield carbocatalysts with active catalytic sites for the aerobic dehydrogenation (27)(28)(29), while the structures of active sites are still unclear.…”

Section: Introductionmentioning

confidence: 99%

Metal-free carbocatalyst for room temperature acceptorless dehydrogenation of N-heterocycles

Nie

Tao

et al. 2022

Sci. Adv.

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Catalytic dehydrogenation enables reversible hydrogen storage in liquid organics as a critical technology to achieve carbon neutrality. However, oxidant or base-free catalytic dehydrogenation at mild temperatures remains a challenge. Here, we demonstrate a metal-free carbocatalyst, nitrogen-assembly carbons (NCs), for acceptorless dehydrogenation of N-heterocycles even at ambient temperature, showing greater activity than transition metal–based catalysts. Mechanistic studies indicate that the observed catalytic activity of NCs is because of the unique closely placed graphitic nitrogens (CGNs), formed by the assembly of precursors during the carbonization process. The CGN site catalyzes the activation of C─H bonds in N-heterocycles to form labile C─H bonds on catalyst surface. The subsequent facile recombination of this surface hydrogen to desorb H 2 allows the NCs to work without any H-acceptor. With reverse transfer hydrogenation of various N-heterocycles demonstrated in this work, these NC catalysts, without precious metals, exhibit great potential for completing the cycle of hydrogen storage.

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Mesoporous carbons as metal-free catalysts for propane dehydrogenation: Effect of the pore structure and surface property

Cited by 33 publications

References 53 publications

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Novel Ge/SiO₂ Catalysts for Nonoxidative Dehydrogenation of Propane

Metal-free carbocatalyst for room temperature acceptorless dehydrogenation of N-heterocycles

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Mesoporous carbons as metal-free catalysts for propane dehydrogenation: Effect of the pore structure and surface property

Cited by 33 publications

References 53 publications

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine

Novel Ge/SiO2 Catalysts for Nonoxidative Dehydrogenation of Propane

Metal-free carbocatalyst for room temperature acceptorless dehydrogenation of N-heterocycles

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Novel Ge/SiO₂ Catalysts for Nonoxidative Dehydrogenation of Propane