Papers by Keyword: Activated Carbon Fiber

Abstract: Activated carbon fiber has excellent structural characteristics and adsorption performance. It can effectively adsorb various inorganic and organic compounds and has good regeneration performance. Therefore, it is widely used in the market. To study the advantages of activated carbon fiber in purifying water resources, this research use application of activated carbon fiber material in purification and filtration of water filter, and the test of adsorption and filtration effect of different host materials are described. The main body and influencing factors of filtering effect are obtained. In this research, the viscose-based activated carbon fiber mats and acrylic-based activated carbon fabrics are the main research subjects, and other materials were added for coating composite research. Through a comparative study of the two materials, it has been found that carbon fiber has many advantages, such as is more economical, practical, convenient, low cost, and cost-effective, and is worthy of promotion in industry and daily life using.

Abstract: Three activated carbon fibers, namely Sample A, B, and C, were used as electrodes for Ca²⁺ removal by capacitive deionization in this study. The physical properties of ACFs were comprehensively investigated with regard to surface area, pore volume, pore size distribution, specific capacitance, and contact angle. An internal correlation was intended to reveal between the ACF properties and their CDI performance. Pseduo-first-order adsorption kinetics model could successfully depict the Ca²⁺ removal with different ACF electrodes. Based on the fitting parameters, Sample B with the highest pore volume, specific capacitance, and hydrophilicity exhibited the highest equilibrium electrosorption capacity (9.977 mg-Ca²⁺/g-ACF). However, Sample A with the highest average pore diameter (2.4 nm) has the highest rate constant (0.074/min). Even though the abundant micropores with diameters less than 2 nm created large specific surface area in Sample C, its uptake of Ca²⁺ was not as good as that of Sample A.

Abstract: 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.

Abstract: In order to improve the adsorption performance of wooden activated carbon fibers (WACFs) and enlarge its application in food safety and fresh, the charcoal dust is used as pore-forming agent, and the absorption performance of WACFs for methylene blue (MB) by changing the liquid-solid rate, charcoal content, synthetics content and hydrochloric acid concentration is studied. The results show that: with the increase of liquid-solid ratio, the absorption capacity of WACFs for MB increases accordingly; with the increase of charcoal content and synthetics content, the absorption capacity both show the tendency of increasing first then reducing after accordingly, with the maximum absorption capacities of 534.61mg·g^-1 and 527.25mg·g^-1 respectively reached by 1% charcoal content and 4% synthetic content. When the hydrochloric acid concentration was below 15%, the absorption capacity increases linearly, while reduced when hydrochloric acid concentration was over 15%.

Abstract: Activated carbon fiber is known to posses better properties compared to granular and powdered variants, with significantly higher surface area and higher pore volume. Source of raw material and activation step are two crucial parameters for the pore development of activated carbon. Palm oil empty fruit bunch fiber contains naturally formed long open channels which offer better access of adsorbates into micropores. Chemical activation step typically involves inorganic acids such as phosphoric acid and sulfuric acid. However, such residues of inorganic acids might create unfavourable conditions for certain adsorption applications, if not removed properly from synthesized activated carbon fiber. Additionally, subsequent to the acid cleaning or removal step, most inorganic acids would eventually cause problems to the environment if acid disposal is not properly managed. This paper investigates on the effect of utilization of organic acids acetic acid and citric acid, as compared to commonly used inorganic acids, on the pore characteristics of palm oil empty fruit bunch fiber derived activated carbon fiber.

Abstract: This paper studies the degradation of herbicide atrazine. It was degraded by three-dimension-electrode electrochemical oxidation, which platinum was used as cathode and anode, and activated carbon was used as packed material and adsorbent. The effect of input current, initial pH, electrolyte concentration and solution temperature on degradation efficiency of atrazine was discussed. The results showed that atrazine can be effectively degraded by three-dimension-electrode electrochemical oxidation. The optimal conditions of operation are as follows: input current is 30mA, initial pH is 4, solution temperature is 20°C, and electrolyte concentrations is 0.10mol/L. Under the optimal conditions, degradation efficiency of atrazine can reach more than 99%, and the degradation rate is highest.

Abstract: The research used activated carbon fiber (ACF) as adsorbent to remove atrazine, a kind of herbicide. It set a series of static adsorption experiments under different solution temperature, pH value and initial concentration to get a optimum adsorption condition. The experiment shows that the optimum pH for the removal of atrazine is 7. The adsorption rate is highest at 20°C. The adsorption rate decreases while the initial concentration increases.

Abstract: This essay describes the findings of generating the electrode composite of polyaniline/activated carbon fiber ( PANI/ACF) by repeatedly immersing eigenstate PANI into the solution of NMP and CHCl₃ added with VC. A samples surface profile and structure were represented using SEM and FT-IR. Thereafter the composite was assembled into a super capacitor, electrochemical performances of which were then tested through cyclic voltammetry (CV). The result showed that the specific capacitance of this composite is up to 531.75F/g in the solution of 6 mol·L^-1 KOH.

Abstract: 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%.

Abstract: 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%.