Ammonia removal of activated carbon fibers produced by oxyfluorination

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Global warming is considered one of the great challenges of the twenty-first century. In order to reduce the ever-increasing amount of methane (CH 4 ) released into the atmosphere, and thus its impact on global climate change, CH 4 storage technologies are attracting significant research interest. CH 4 storage processes are attracting technological interest, and methane is being applied as an alternative fuel for vehicles. CH 4 storage involves many technologies, among which, adsorption processes such as processes using porous adsorbents are regarded as an important green and economic technology. It is very important to develop highly efficient adsorbents to realize techno-economic systems for CH 4 adsorption and storage. In this review, we summarize the nanomaterials being used for CH 4 adsorption, which are divided into non-carbonaceous (e.g., zeolites, metal-organic frameworks, and porous polymers) and carbonaceous materials (e.g., activated carbons, ordered porous carbons, and activated carbon fibers), with a focus on recent research.

Section: Activated Carbon Fibersmentioning

confidence: 99%

A review: methane capture by nanoporous carbon materials for automobiles

Choi¹,

Jeong²,

Choi³

et al. 2016

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“…Fluorine gas appeared to react with the carbon more actively than with the oxygen, resulting in the breakage of the sp 2 carbon aromatic structure. The carbon-oxygen single and double-bond peak intensities increased with increasing oxygen content in the reactive gas [30]. In sample OFACF-2, the total http://carbonlett.org area, total pore volume, and micropore volume while increasing the concentration of the used chemical agent solution.…”

Section: Methodsmentioning

confidence: 96%

Influence of oxyfluorination on activated carbon nanofibers for CO₂storage

Bai¹,

Kim²,

Im³

et al. 2011

The oxyfluorination effects of activated carbon nanofibers (OFACFs) were investigated for CO 2 storage. Electrospun CFs were prepared from a polyacrylonitrile/N,N-dimethylformamide solution via electrospinning and heat treatment. The electrospun CFs were chemically activated in order to generate the pore structure, and then oxyfluorination was used to modify the surface. The samples were labeled CF (electrospun CF), ACF (activated CF), OFACF-1 (O 2 :F 2 = 7:3), OFACF-2 (O 2 :F 2 = 5:5) and OFACF-3 (O 2 :F 2 = 3:7). The functional group of OFACFs was investigated using X-ray photoelectron spectroscopy analysis. The C-F bonds formed on surface of ACFs. The intensities of the C-O peaks increased after oxyfluorination and increased the oxygen content in the reaction gas. The specific surface area, pore volume and pore size of OFACFs were calculated by the Brunauer-Emmett-Teller and density functional theory equation. Through the N 2 adsorption isotherm, the specific surface area and pore volume slightly decreased as a result of oxyfluorination treatment. Nevertheless, the CO 2 adsorption efficiency of oxyfluorinated ACF improved around 16 wt% due to the semi-ionic interaction effect of surface modificated oxygen functional groups and CO 2 molecules.

“…Especially, porous materials (including activated carbons, zeolites, and alumina powders) are useful materials for gas adsorption and storage [42][43][44][45][46][47][48][49]. Adsorption, especially using activated carbon (AC) as adsorbent, is currently the most widely used technology for hazardous gas removal from the incineration flue gases [50][51][52][53][54][55][56][57][58][59][60][61]. As for the sorbent injection technique, activated carbons are injected into the flue gas right before it enters the electrostatic precipitators or bag house filters.…”

Section: +mentioning

confidence: 99%

Overlook of carbonaceous adsorbents and processing methods for elemental mercury removal

Bae¹,

Kim²,

Park³

2014

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People have been concerned about mercury emissions for decades because of the extreme toxicity, persistence, and bioaccumulation of methyl Hg transformed from emitted Hg. This paper presents an overview of research related to mercury control technology and identifies areas requiring additional research and development. It critically reviews measured mercury emissions progress in the development of promising control technologies. This review provides useful information to scientists and engineers in this field.