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There is growing global interest on bio-methane as a vehicular fuel and Europe Union (EU) has stated that this as a best well-to-wheel fuel. Commercialization of bio-methane under atmospheric conditions is limited due to its requirement of higher storage capacity. Compressed bio-methane systems have been currently commercialized in Europe in order to increase its low energy density however the process...
The feasibility of using guava waste activated carbon (GWAC) for the methylene blue (MB) adsorption has been investigated. The GWAC was prepared using simple thermochemical activation method. The comparison on adsorption performance between GWAC and commercial activated carbon (CAC) were conducted using the batch adsorption study to determine the adsorption capacity for both adsorbents. The adsorption...
The thermodynamics and kinetics on adsorption of Cr, Fe and Ni by activated carbon from stainless pickling wastewater are studied. The results show that the adsorption capacity of Cr, Fe and Ni are 8.198, 1.629 and 2 mg/g, respectively. The Freundlich isotherm model can fit the multi-component system better than the Langmuir isotherm, while the Langmuir - Freundlich equation is the best choice to...
Activated Carbon is a water treatment adsorbent with a large adsorption capacity, its adsorption capacity will be able to greatly enhance after modified activated. Through the use of before and after the modification of mesoporous activated carbon powder to the heavy metals copper ion adsorption, the effects of different pH, adsorption temperature, balance time, the amount of activated carbon adsorption...
Flue gas desulfurization by activated carbon is an environmental-friendly technique used in thermal power plant. The mass transfer process of SO2 about flue gas desulfurization by activated carbon is analyzed, effective mass transfer velocity of SO2 on fixed bed is proposed and mathematics model is established. Internal diffusivity and internal surface availability coefficient of different activated...
A study was conducted on the adsorption kinetics of diuron from aqueous solutions onto activated carbon fiber. The results showed that the formation of hydrogen bonds between diuron and water, and temperature variations may possibly affect the adsorption process. Furthermore, adsorption of diuron onto activated carbon fiber was affected remarkably by solution pH and the maximum adsorption amount was...
A mathematical model of the PAC-UF membrane flux through a number of factors and quantitative characterization, based on Darcy's law, has been derived. Meanwhile, PAC-UF combined process was applied to treat Gan River micro-polluted raw water. Validity of the mathematical model is verified with the experiment. Furthermore, for different operation pressure and running time, the result shows that the...
The paper is aim to discuss the dye wastewater treatment by sewage sludge-based adsorbent. The adsorbent derived from sewage sludge , which produced through phosphoric acid-microwave method, and commercial activated carbon (ACC) were tested in the process of the Reactive Light Yellow dye wastewater treatment. The effects of pH value, contact time and the adsorbents' amount on the adsorption efficiency...
Adsorption equilibrium and kinetics of typical acidic and basic dyes, acid red 33 and basic violet 3, onto Semen Euryales Shell Activated Carbon (SESAC) were investigated under varying solution pHs and temperatures. Equilibrium data showed acidic pH was favourable for the adsorption of acid red 33 onto SESAC, while basic pH was favourable for basic violet 3. The adsorption capacity of dye increased...
Cr(VI) has posed great threat on environmental safety and human health, thus the remediation of Cr(VI) pollution is of considerable importance. The adsorption of Cr(VI) from aquatic solution using activated carbon was studied in this paper. The Cr(VI) sorption was relative to pH, contact time, initial content of solution, adsorbent dose and temperature. The maximum removal efficiencies of Cr(VI) were...
Based upon fluid dynamics modeling of gas-solids two-phase flows and Euler-Euler two-fluid modeling approach (TFM), incorporated the kinetic model of heterogeneous catalytic reaction, The spouted bed reactor using activated carbon particles to remove SO2 from flue gases was studied. The distribution of SO2 and overall flow patterns including a stable spout region, a fountain region and an annular...
The effects of the presence of water vapor on adsorption of benzene, toluene, acetone and ethyl acetate were studied. Results show that competitive adsorption of water in binary system had depression effect on the adsorption of organic vapors, and the depression effect of humidity on the adsorption capacity of organic vapors increases with an increase in relative humidity and polarity of organic vapors...
Supercapacitors are commonly based on porous activated carbon electrodes and on electrostatic charge storage mechanism. The carbon electrodes are supposed to be chemically and electrochemically inert and the electrostatic nature of the charge storage mechanism is highly reversible. These properties should ensure to supercapacitors an infinite shelf life. But in practice, supercapacitor cells exhibit...
The adsorption equilibrium of CO2 was measured on coconut shell activated carbon by using a static volumetric method. Adsorption isotherms over the temperature ranged 308 K ~ 353 K were measured. The results showed that the capacities of adsorption of carbon dioxide on activated carbon at different temperatures were as follows: 308 K > 323 K > 338 K > 353 K. The absorption capacity increases...
The effects of salinity and humic acid (HA) on di-n-butyl phthalate (DBP) adsorption by nutshell-based activated carbon were studied by batch experiments in this paper. Adsorption kinetics was evaluated. The kinetic curves were almost the same both in the presence and absence of NaCl, and second time adsorption occurred in the presence of HA. Three kinetic models, pseudo-first-order, pseudo-second-order...
The sludge carbon made from sewage sludge with ZnCl2 are used for gatifloxacin adsorption. Characterizing sludge carbon and researching mechanism of gatifloxacin adsorption on different adsorbents. The results showed: sludge carbon have large surface area and mid-hole structure. The adsorption keep to second kinetics model, that means chemical adsorption is the main progress. The research proves sludge...
Coke oven gas is one of by-products generated in the process of dry distillation of coal to form coke. The coke oven gas is of high value in used as not only energy but also chemical material, but it contains hydrogen sulfide (H2S) gas which limits its application. Thus, it is necessary to remove H2S from the coke oven gas in order to use it as energy or chemical material. The thermodynamic analysis...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
Over the past several decades, trace heavy metal ion pollution, such as Cd(II), Cu(II), Pd(IV), etc., have attracted much attention because of their virulent and hard degradation properties. Recently, great efforts have been devoted to establish new methods and technologies to removal toxic metals. Among them, activated carbon adsorption, especially the modified activated carbon technology has been...
Textile effluents are major industrial polluters. The present paper aims to investigate and develop low cost adsorption methods for color removal wastewater using waste materials raw (RP) and activated carbon (ACP) from plane tree yellow leaves as adsorbent. The method was applied for the removal of direct red 81 while the influence of various factors such as adsorbate concentration and pH were studied...
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