The role of surface oxygen-containing functional groups in liquid-phase adsorptive denitrogenation by activated carbon

Li, Na; Almarri, Masoud; Ma, Xiaoliang; Zha, Qingfang

doi:10.1016/s1872-5805(11)60093-0

Cited by 35 publications

(9 citation statements)

References 34 publications

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“…As a result, carboxylic acid groups were almost removed after the thermal regeneration process and may be partially reduced at 300°C, a temperature used to eliminate solvents during carbon regeneration. Li et al reported that the carboxylic acid groups on AC played an important role in the adsorption of indole. Phenolic groups have also showed a positive effect on indole adsorption to some extent.…”

Section: Resultsmentioning

confidence: 99%

A comparison of three methods to regenerate activated carbon saturated by diesel fuels

2014

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The three regeneration methods (thermal treatment, ultrasonication, and solvent extraction) were studied to regenerate the adsorptive capacity of the activated carbons (ACs) that were saturated by the nitrogen and sulphur containing compounds of diesel fuels. This is one of the few reports that give attention to the regeneration of heteroaromatic compounds contaminated ACs. Both model diesel and light cycled oil (LCO) were served as feedstocks. High regeneration rates can be obtained for all three approaches when model diesel was used as the feed. As model diesel was replaced by LCO, a significant drop in capacity restoration can be observed for the first few cycles and then the decrease rate slowed down. Solvent extraction outperformed the other two methods. The causes to lower regeneration performance were also analysed. It is shown that the regenerated carbons had a lower porosity and surface area and fewer surface oxygen functional groups than fresh carbon regardless of the regeneration methods employed. Significant micropore blockage was observed in the carbon regenerated by the thermal approach due to the coke deposit under thermal conditions. Mesopores formed during the regeneration by ultrasonication are considered to promote the carbon adsorption capacity.

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Section: Resultsmentioning

confidence: 99%

A comparison of three methods to regenerate activated carbon saturated by diesel fuels

2014

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“…led to increased yield of the MF even though the conversions decreased in some cases. Better MF yields were probably related to the higher amount of surface oxygen groups in the catalysts (Supplementary Material Table S2), which are known to affect adsorption properties of ACs [31,61].…”

Section: Conversion Of Furfural To 2-methylfuranmentioning

confidence: 99%

Conversion of furfural to 2-methylfuran over CuNi catalysts supported on biobased carbon foams

et al. 2021

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“…[7][8][9] However, the HDN method, which is carried out under high pressure and temperature conditions, is the most difficult hydrotreatment reaction. 10,11 As an alternative method, adsorption appears to be a promising approach to ultradeep denitrogenating because it can be run at ambient temperature and atmospheric pressure. [12][13][14] The molecular imprinting technique (MIT) has attracted attention recently for its outstanding advantages, such as predetermined recognition ability, stability, and low cost of preparation.…”

Section: Introduction Nmentioning

confidence: 99%

“…Currently, the removal of nitrides from liquid hydrocarbon streams is mainly carried out by the catalytic hydrodenitrogenation (HDN) process in refineries . However, the HDN method, which is carried out under high pressure and temperature conditions, is the most difficult hydrotreatment reaction . As an alternative method, adsorption appears to be a promising approach to ultradeep denitrogenating because it can be run at ambient temperature and atmospheric pressure …”

Section: Introductionmentioning

confidence: 99%

Core–Shell Magnetic Molecularly Imprinted Polymer Prepared for Selectively Removed Indole from Fuel Oil

Niu

Ni²,

Zhou

et al. 2015

Adv Polym Technol

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Magnetic molecularly imprinted polymers (MMIPs) were synthesized for selective recognition and rapid enrichment of indole from a model fuel. The MMIPs were synthesized by precipitation polymerization and a surface molecular imprinting technique, using indole as the template molecule, Fe 3 O 4 nanoparticles as magnetically susceptible components, methylacrylic acid as the functional monomer, and ethylene glycol dimethacrylate as a cross-linker. The properties of the MMIPs were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and thermogravimetric analysis. The adsorption capacity of indole-molecularly imprinted polymers (MIPs) was 50.25 mg g −1 at 303 K and reached adsorption equilibrium in a short time. Experimental data were modeled with a pseudo-second-order, Langmuir isotherm model. The selective adsorption performance of MIPs was favorable. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015, 0, 21596; View this article online at wileyonlinelibrary.com.

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The role of surface oxygen-containing functional groups in liquid-phase adsorptive denitrogenation by activated carbon

Cited by 35 publications

References 34 publications

A comparison of three methods to regenerate activated carbon saturated by diesel fuels

A comparison of three methods to regenerate activated carbon saturated by diesel fuels

Conversion of furfural to 2-methylfuran over CuNi catalysts supported on biobased carbon foams

Core–Shell Magnetic Molecularly Imprinted Polymer Prepared for Selectively Removed Indole from Fuel Oil

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