Mesoporous Activated Carbon Fibers from Lignocelullosic Materials: Adsorption Studies
نویسندگان
چکیده
High surface area and highly mesoporous activated carbon fibers (ACF) were obtained by physical activation of natural precursors (vetiver roots and bagasse) with steam and chemical activation using phosphoric acid. The textural characteristics of the activated were determined by nitrogen adsorption study and mercury porosimetry and showed that interesting porosity were obtained (SBET up to 1600 m/g) and high mesoporous volume (Vmes up to 1.6 cm/g). A study comparing the Brunauer-Emmet-Teller (BET) and the Freundlich equation when applied to N2 adsorption isotherm at 77 K was done. The ability of the developed activated carbons fibers to remove methylene blue and phenol from aqueous solution was investigated. Isotherm and kinetic studies were carried out to determine various factors necessary to establish adsorption treatment process. Evaluation of different isotherm and kinetic models was done to study their accuracy for modelling our adsorption data, allowing us to bring some informations on the adsorption mechanism. We also demonstrate that a recently developped fractal kinetic model could be applied to the adsorption kinetic data giving low normalized standard deviation values.
منابع مشابه
Quenched solid density functional theory and pore size analysis of micro-mesoporous carbons
We present a new model of adsorption on micro-mesoporous carbons based on the quenched solid density functional theory (QSDFT). QSDFT quantitatively accounts for the surface geometrical inhomogeneity in terms of the roughness parameter. We developed the QSDFT models for pore size distribution calculations in the range of pore widths from 0.4 to 35 nm from nitrogen at 77.4 K and argon at 87.3 K ...
متن کاملStepwise Synthesis of Mesoporous Carbon Nitride Functionalized by Melamine Based Dendrimer Amines for Adsorption of CO2 and CH4
In this study, a novel solid dendrimer amine (hyperbranched polymers) was prepared using mesoporous carbon nitride functionalized by melamine based dendrimer amines. This adsorbent was denoted MDA-MCN-1. The process was stepwise synthesis and hard-templating method using mesoporous silica SBA-15 as a template. Cyanuric chloride and N,N-diisopropylethylamine (DIPEA, Merck) were used for function...
متن کاملMesoporous Carbon Materials as Electrodes for Electrochemical Supercapacitors
In this paper, we report the synthesis and characterization of mesoporous carbons, which were obtained using SBA-15 silica as the template material and sucrose as the carbon source. The prepared silica template and mesoporous carbons were characterized by nitrogen adsorption-desorption, low angle X-ray diffraction (XRD) and transmission electron microscopy (TEM). Synthesized carbons were used t...
متن کاملModeling studies for adsorption of phenol and co-pollutants onto granular activated carbon prepared from olive oil industrial waste
Granular activated carbon (OSAC) which was derived from olive oil industrial solid waste was chemically activated with different concentrations of phosphoric acid. OSAC-materials were evaluated for their ability to remove phenol from aqueous solution in a batch technique. Adsorption isotherms were determined and modeled with five linear Langmuir forms, namely the Freundlich, Elovich, Temkin, Ki...
متن کاملAdsorption of Phenolic Compounds onto the Activated Carbon Synthesized from Pulp and Paper Mill Sludge: Equilibrium Isotherm, Kinetics, Thermodynamics and Mechanism Studies
A new activated carbon was produced from pulp and paper mill sludge as a low cost precursor via chemical activation by zinc chloride. The activated carbon was successfully used for the adsorption of phenol and two of its derivatives, i.e. 2-chlorophenol and 4-nitrophenol from aqueous solutions. The characterization of the prepared activated carbon demonstrated high textural properties for the s...
متن کامل