The Preparation of the Second Modification of Activated Carbon Fiber Loaded Mn

2011 ◽  
Vol 109 ◽  
pp. 261-265
Author(s):  
Lu Lu ◽  
Jing Zhang ◽  
Ying Chun Yan
Keyword(s):  
Activated Carbon ◽  
Adsorption Properties ◽  
Activated Carbon Fiber ◽  
Impregnation Method ◽  
Optimal Conditions ◽  
Activation Time ◽  
Time Condition ◽  
Orthogonal Experiments ◽  
Iodine Adsorption ◽  
N2 Activation

The Mn loaded ACF (ACF-Mn), prepared by impregnation method combined with activation method under high temperature, can be second modified. The best second modifiers, modifier concentration and activation time condition for ACF-Mn was determine by orthogonal experiments. The modified ACF was characterized by XRD、SEM、EDS and other ways. The results show that the optimal conditions for the second modification was that at 700°C under the protection of N2 activation for 50 min when the modifier concentration of CuSO4 was 10%. The iodine adsorption value of the second modified ACF is 1605.36 mgg-1, and the content of basic functional groups is 119.86 mmolg-1. The granular Cu, Mn attached to the surface of ACF and significantly increased its crystallinity. This is helpful to increase the surface area and enhance its adsorption properties.

The Adsorption of Low Concentration SO2 with the Second Modified Activated Carbon Fiber Loaded Mn

2011 ◽  
Vol 109 ◽  
pp. 125-130
Author(s):  
Jie Fu ◽  
Ying Chun Yan ◽  
Jing Zhang
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
Adsorption Properties ◽  
Activated Carbon Fiber ◽  
Impregnation Method ◽  
Air Velocity ◽  
Desulfurization Rate ◽  
Modified Activated Carbon ◽  
Low Concentration ◽  
Adsorption Temperature

The Mn loaded ACF (ACF-Mn), prepared by impregnation method combined with activation method under high temperature, can be used to adsorb the low concentration SO2. The modified ACF was characterized by iodine value and functional groups. The adsorption properties of low concentration SO2 on ACF-Mn-Cu50 were also studied. The result showed that the adsorption properties were improved with the granular Cu. Amount of Mn particles attached to the surface of ACF and the desulfurization rate of ACF-Mn-Cu50 both increased after second modification when the adsorption temperature was 60°C, the air velocity was Q1=0.3 L/min and Q2=0.4 L/min respectively and the concentration of SO2 was 0.62×10-4 μg/ml.

scholarly journals Simultaneous Catalysis of Sulfite Oxidation and Uptake of Heavy Metals by Bifunctional Activated Carbon Fiber in Magnesia Desulfurization

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 244
Author(s):  
Yuguo Wang ◽  
Tieyue Qi ◽  
Mengxuan Hu ◽  
Yu Yang ◽  
Lei Xing ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Carbon Fiber ◽  
Catalytic Oxidation ◽  
Single Layer ◽  
Bifunctional Catalyst ◽  
Activated Carbon Fiber ◽  
Impregnation Method ◽  
Characterization Methods ◽  
Operation Conditions

Sulfite and heavy metals are crucial pollutants in the slurry produced by flue gas desulfurization. In this study, a novel cobalt-based activated carbon fiber (Co-ACFs) catalyst-adsorbent was synthesized using an impregnation method; this bifunctional catalyst-adsorbent was used in wet magnesia desulfurization for the simultaneous catalytic oxidation of magnesium sulfite and uptake of heavy metal (Hg2+, Cd2+, and Ni2+) ions. The morphology and surface chemistry of ACFs before and after cobalt loading were investigated using various characterization methods. The kinetics on catalytic oxidation of magnesium sulfite was investigated, and the effects of operation conditions on the simultaneous adsorption capacity of heavy metals were examined. Relative to a non-catalysis material, the 40% Co-ACFs material increased the oxidation rate of magnesium sulfite by more than five times. The Langmuir model can describe the adsorption behavior of Co-ACFs on Hg2+, Cd2+, and Ni2+, indicating that the simultaneous uptake of heavy metals is a single-layer adsorption process. The maximum adsorption capacities for Hg2+, Cd2+, and Ni2+ are 333.3, 500, and 52.6 mg/g, respectively. A pseudo-second-order model confirmed that the removal of heavy metals is controlled by the chemisorption process.

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.

Technology Optimization Study on Preparation of Activated Carbon from Rice Husk Cracking

2011 ◽  
Vol 197-198 ◽  
pp. 931-934
Author(s):  
Feng Gao ◽  
Ying Xin Ge ◽  
Jia Zhao ◽  
Hai Xia Yang
Keyword(s):  
Activated Carbon ◽  
Rice Husk ◽  
Active Agent ◽  
Quadratic Equation ◽  
Activation Time ◽  
Activation Temperature ◽  
Optimization Study ◽  
Activation Ratio ◽  
Iodine Adsorption ◽  
Temperature Activation

Response surface methodology (RSM) was adopted to study the key parameters such as activation temperature, activation time, and active agent amount in order to increase activated carbon iodine adsorption value from rice husk. A second order quadratic equation was established and the applicability of model and interaction involved factors on predicting the iodine adsorption value was verified. The results indicated that the effect on the iodine adsorption value was as follows: activation temperature, activation ratio, activation time. The optimal levels for achieving the highest iodine adsorption value were obtained, including activation temperature of 550°C, activation time of 48min and activation ratio of 1.25. The iodine adsorption value reached 1464.793mg/g under optimized conditions. Iodine adsorption value was conducted under the optimum condition and the results showed the average relative error 0.58%, it proved that the models fitted well, the experimental data and the model were feasible.

Adsorption properties of nitrogen-alloyed activated carbon fiber

Carbon ◽  
2001 ◽  
Vol 39 (7) ◽  
pp. 1075-1082 ◽  
Author(s):  
Cheol-Min Yang ◽  
Katsumi Kaneko
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Adsorption Properties ◽  
Activated Carbon Fiber
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