Characters of Nickel-Loaded Activated Carbon Fibers and Adsorption Experiments of Gaseous Mercury

2010 ◽  
Vol 156-157 ◽  
pp. 1211-1214 ◽  
Author(s):  
Jian Dong Ding ◽  
Yong Fa Diao ◽  
Heng Gen Shen
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Nickel Content ◽  
Fiber Surface ◽  
Elemental Mercury ◽  
Activated Carbon Fiber ◽  
Adsorption Ability ◽  
Before And After ◽  
Element Mercury

Nickel was loaded on the activated carbon fiber(ACF) surface, by adsorption and sintering. In order to change the chemical functional groups on the carbon fiber surface, and increase catalytic oxidation capacity and removal efficiency of activated carbon fiber to element mercury. The samples of ACF were characterized before and after loading, using XPS and XRD. The results show that the nickel content in the ACF surface was 3.36at.%. The presence of nickel form was NiO and Ni. The adsorption ability of elemental mercury before and after modification was also studied. The breakthrough time was greatly extended after loading. At 95 , the ACF loaded nickel showed the best adsorption performance.

Removal of Gas-Phase Element Mercury by Activated Carbon Fiber Impregnated with CeO2

2010 ◽  
Vol 24 (8) ◽  
pp. 4250-4254 ◽  
Author(s):  
Xiaopeng Fan ◽  
Caiting Li ◽  
Guangming Zeng ◽  
Zhao Gao ◽  
Ling Chen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Gas Phase ◽  
Activated Carbon Fiber ◽  
Element Mercury

scholarly journals Determination of the Optimum Removal Efficiency of Fine Particulate Matter Using Activated Carbon Fiber (ACF)

2020 ◽  
Vol 17 (21) ◽  
pp. 8230
Author(s):  
Min-Kyeong Kim ◽  
Yelim Jang ◽  
Duckshin Park
Keyword(s):  
Activated Carbon ◽  
Particulate Matter ◽  
Carbon Fiber ◽  
Removal Efficiency ◽  
High Speed ◽  
Fine Particulate Matter ◽  
Activated Carbon Fiber ◽  
Optimal Conditions ◽  
Before And After

In Korea, concentrations of particulate matter (PM10) are significantly higher in urban railway tunnels (178.1 μg/m3) than in metropolitan areas (49 μg/m3). In railway tunnels in Korea, it was maintained at 3–4 times higher concentration than general atmosphere and platform. Dust generated by trains is scattered at high speed in these tunnels, making filtration difficult; therefore, the development of filters that can be maintained in tunnels is required. In the present study, we examined PM adsorption in the laboratory scale using activated carbon fiber (ACF), which has high adsorption and capacity. The ACF depth, velocity of flow, and fine PM concentration in the tunnel were the experimental variables. We compared PM concentrations before and after the filter experiments, and calculated removal efficiency to determine the optimal conditions. Comprehensive examination of the experimental variables and differential pressure showed that the optimal conditions for an ACF specimen were a wind speed of 3.0 m/s and the ACF depth of 400 mm. The average removal efficiency of PM10 was 55.5%, and that of PM2.5 was 36.6%. The reproducibility tests showed that the ACF filter could be washed and reused and is suitable for various places because it is easily maintained.

Application of Activated Carbon Fiber Coated with Cobalt Oxide in Mercury Removal from Simulated Flue Gas

2011 ◽  
Vol 356-360 ◽  
pp. 547-553
Author(s):  
Yong Fa Diao ◽  
Jian Dong Ding ◽  
Wan Xuan Yu ◽  
Yue Zou ◽  
Wei Hui Hao
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Catalytic Oxidation ◽  
Cobalt Oxide ◽  
Flue Gas ◽  
Adsorption Properties ◽  
Activated Carbon Fiber ◽  
Mercury Removal ◽  
Measurement Results ◽  
Element Mercury

In this paper, cobalt oxide was deposited on the surface of Activated Carbon Fiber (ACF) by adsorption and was then sintered. The effects of cobalt oxide on the properties of ACF were studied by XPS, FTIR, and XRD methods. Mercury removal performance was also investigated. 5% cobalt was well dispersed on the surface of ACF, and a variety of oxygen-containing groups had been enhanced. The chemical functional groups on the surface of ACF were changed to strengthen the adsorption and catalytic oxidation of ACF to the element mercury (Hg0). The measurement results showed that ACF coated with cobalt oxide had higher adsorption properties.

Regeneration of Activated Carbon Fiber Using Microwave under Vacuum Condition

2013 ◽  
Vol 373-375 ◽  
pp. 2019-2023
Author(s):  
Quan Li Feng ◽  
Chen Xu Wang ◽  
Xue Qian Wang ◽  
Ping Ning
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Mass Loss ◽  
Carbon Fibers ◽  
Irradiation Time ◽  
Vacuum Condition ◽  
Activated Carbon Fiber ◽  
Activated Carbon Fibers ◽  
Total Mass Loss ◽  
Microwave Regeneration

The purpose of this work was to explore the application of microwaves for the regeneration of activated carbon fibers saturated with ethanol under vacuum condition. The efficacy of the regeneration was analyzed by the rate of desorption and mass loss. When the microwave power was 680W , the dosage of activated carbon fiber was 3.5g , the degree of vacuum is 0.05MPa and the microwave irradiation time was 180s, the desorption rate was up to 95.3% and the outlet concentration of ethanol was 97.5%. The adsorption of activated carbon fiber after microwave regeneration for many times was larger than the fresh activated carbon fiber. And the rate of total mass loss was 3.54%.

The Catalytic Reduction of Nitrogen Oxide Over the Catalysts Supported on Activated Carbon Fibers

1994 ◽  
Vol 344 ◽  
Author(s):  
Yun Lu ◽  
Ruowen Fu ◽  
Yishan Chen ◽  
Hanmin Zeng
Keyword(s):  
Nitric Oxide ◽  
Activated Carbon ◽  
Carbon Fiber ◽  
Nitrogen Oxide ◽  
Carbon Fibers ◽  
Catalytic Reduction ◽  
Activated Carbon Fiber ◽  
Activated Carbon Fibers ◽  
Catalytic Activities ◽  
Composite Series

AbstractCopper-series, nickel-series, and copper-cobalt composite-series catalysts supported on activated carbon fiber were prepared in this paper. Their structures and catalytic activities for the reduction of nitric oxide with ammonia were investigated simultaneously.

MODIFIED CARBON FIBER. USING THEM TO REMOVE METAL AND ORGANIC IMPURITIES FROM AQUATIC ENVIRONMENTS

1970 ◽  
Vol 61 (11) ◽  
Author(s):  
Elvira R. Valinurova ◽  
Gulnaz F. Shaymukhametova ◽  
Alena A. Kozhanova ◽  
Ekaterina O. Fokina
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Activated Carbon ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Heavy Metal Ions ◽  
Adsorption Equilibrium ◽  
Equilibrium Constants ◽  
Activated Carbon Fiber ◽  
Graphitized Carbon

The adsorption properties of activated and graphitized carbon fibers to heavy metal ions, phenols and anilines have been studied. It is shown that carbon fibers, modified by oxidation with concentrated nitric and sulfuric acids, quantitatively extract ions of heavy metals from water. The distribution and selectivity coefficients of adsorption of heavy metal ions on an activated carbon fiber and its oxidized samples are calculated, and selectivity series of adsorption are presented. Preliminary treatment of carbon fibers with organic reagents containing heteroatoms-donors of activity and selectivity was carried out. Preliminary application of urea to the surface of the carbon fiber, reduces the time of establishment of adsorption equilibrium from 1.5 - 2 h to 40 min, and increases the recovery of bismuth to 64%. Modification of the carbon fiber with thiourea allows quantitatively (99%) to recover bismuth from water in 20 min. The degree of extraction of tin by modified thiourea fiber increases by 14% and reaches 53%. Molybdenum (VI) and mercury (II) are recovered by activated carbon fiber modified with a 15% solution of thiourea by 80% and 99%, respectively. Modification of the surface of activated and graphitized carbon fibers with C60 fullerenes increases the adsorption capacity of the activated carbon fiber to cadmium ions to 69%, and of graphitized carbon fiber to 64%. From the Langmuir equation rectified in the coordinates of the adsorption isotherms of organic and inorganic adsorbates, the monolayer capacitances and the sorption equilibrium constants are calculated. Static exchange capacities of carbon adsorbents for ions of heavy metals vary in the range from 2.8 to 23.0 mg/g. The adsorption equilibrium constants range from 0.1·103 to 9.0·103. It is shown that the adsorption of phenols and anilines depends on the mutual arrangement of the functional groups in the adsorbate molecules. The adsorption equilibrium constants of para-substituted derivatives of phenol and aniline are somewhat lower than those of meta- and ortho-derivatives, the functional groups of which are bound by intramolecular hydrogen bonds and can’t participate fully in adsorption.  

Adsorption and Separation Research of CO2/CH4 on Modified Activated Carbon Fiber

2014 ◽  
Vol 986-987 ◽  
pp. 13-16
Author(s):  
Qin Yuan ◽  
Hong Hong Yi ◽  
Xiao Long Tang ◽  
Kai Li ◽  
Fen Rong Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Adsorption Property ◽  
Activated Carbon Fiber ◽  
Separation Performance ◽  
Activated Carbon Fibers ◽  
Modified Activated Carbon ◽  
Chemical Reagents ◽  
Modified Adsorbents

In this paper, activated carbon fibers were modified by different chemical reagents. The modified adsorbents were used to investigate adsorption and separation performance of CO2/CH4 gases mixture, and then it could get the best modified adsorbent. The experimental results show that amine can't great grafting on activated carbon fiber. Compared with blank activated carbon fibers, the adsorption property of CO2 did not have much influence on the activated carbon fiber modified by amine. However, it can increase the nitrogen functional groups and the specific surface area on the surface of activated carbon fiber that were modified with nitric acid and ammonia. The above two points were conductive to the adsorption and separation of CO2/CH4 mixture gases.

Regeneration of Activated Carbon Fiber by Microwave under Nitrogen Condition

2013 ◽  
Vol 373-375 ◽  
pp. 2024-2029
Author(s):  
Chen Xu Wang ◽  
Xue Qian Wang ◽  
Ping Ning ◽  
Quan Li Feng
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Mass Loss ◽  
Carbon Fibers ◽  
Gas Flow ◽  
Irradiation Time ◽  
Activated Carbon Fiber ◽  
Nitrogen Gas ◽  
Total Mass Loss ◽  
Microwave Regeneration

The purpose of this work was to explore the application of microwaves for the regeneration of activated carbon fibers saturated with ethanol. The efficacy of the regeneration was analyzed by the rate of desorption and mass loss. When the microwave power was 528W , the dosage of activated carbon fiber was 3.0g , the nitrogen gas flow rate was 1.4m3/h and the microwave irradiation time was 180s, the desorption rate was up to 90.2% and the outlet concentration of ethanol was 95.6%. The adsorption of activated carbon fiber after microwave regeneration for many times was larger than the fresh activated carbon fiber. And the rate of total mass loss was 4.74%.

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