Adsorption

Adsorption Colum dynamic studies In general, the most of the adsorption processes are classified into static and dynamic adsorption based on their mode of operation. With dynamic adsorption the adsorbate solution is in continuous contact with the adsorbent packed in a fixed bed column. Therefore, the understanding of the column dynamics behavior is essential to predict the performance of adsorptive separations in the column for process design and optimization of operating conditions. (M1,M4, I8,

Adsorption modeling of breakthrough curves A successful design of a column adsorption process requires prediction of the concentration-time profile or breakthrough curve for the effluent. (a,aa14, aa15, aa7, aa2). There are two widely used approaches to obtain the breakthrough curve of a given adsorption system: direct experimentation or mathematical modeling. The design of an adsorption column through experimental method provides a direct determination of the salient parameters based on the breakthrough

CO2 adsorption capacity is defined as a measure of an adsorbent’s capability or potential to adsorb CO2. It is expressed in terms of number of moles of CO2 that a unit mass of an adsorbent adsorbs under equilibrium conditions. The CO2 adsorption isotherms for MCM-41-30, MCM-41-30-AP-9-85-0.5 and MCM-41-30-TP-9-75-0.3 at 30 °C are presented in Figure 6(a). The CO2 adsorption isotherms for amine tethered samples exhibit a steep nonlinear concave shape due to the strong interactions between carbon dioxide

Pressure Swing Adsorption(PSA): Application of Interfacial Phenomenon Adsorption(gas on solid, different from absorption) Types of Adsorption: chemical adsorption and physical adsorption Principle Surface Energy Thermodynamics of surface adsorption Isotherm Models(introduction of Linear, Langmuir, BET and Freundlich models) Langmuir Adsorption Theorem Introduction to PSA Industrial Application of PSA Industrial data analysis Current Development in PSA(literature review) Scope

The nature and interlayer interactions of the as-synthesized BN materials were also characterized by Raman spectroscopy (Figure 4b). The Raman spectra of the T-BN and F-BN show specific peaks at ∼1371 and ∼1369 cm−1, respectively, corresponding to the B–N vibration mode (E2g). The full width at half maximum (FWHM) was determined to be ∼35 and ∼24 cm−1 for T-BN and F-BN, respectively. The larger FWHM value and higher wavelength demonstrated a low crystalline structure along with the low interlayer

components (López et al., 2014). 2.10 Adsorption isotherms Adsorption isotherm is the relationship between amount of sorbate adsorbed by an adsorbent (solid) and its equilibrium concentration at constant temperature (Theodore and Ricci, 2010). An equilibrium is arrived at where a number of molecules arriving on the surface of an adsorbent equals the number of molecules that are leaving (Thajeel, 2013). Equilibrium data is analyzed using commonly known adsorption systems (Rahimi and Vadi, 2014). The

nonfunctionalized Duolite-S-861 (DLE-861) resin. The maximum removal capacity was achieved at pH 11. The removal of phenol was found to be in the following order DLE-171 > DLE-368 > DLE-861. The mechanism involved in the process was found to be both adsorption and ion exchange. The resin was characterized using FTIR and SEM with EDAX analysis. The equilibrium data were fitted to Freundlich isotherm. The kinetics of the sorption was found to follow pseudo-second-order and intraparticle diffusion models

The isotherms of three samples investigated by the nitrogen adsorption/desorption were shown in Figure 2. The curves of all three samples show hysteresis behavior and belong to type IV isotherms31. It suggests that our samples exhibit mesoporous structure with pore sizes larger than 5.6 nm (Table 2). The pore diameter of thiol-functionalized SBA-15 calculated by the BJH theory is smaller than that of SBA-15, which is attributed to the anchoring of thiol moiety to the silanol group in the interior

Some of these techniques have been shown to be effective however they have some limitations such as excess amount of chemical usage, accumulation of concentrated sludge that has serious disposal problems and lack of effective color reduction. The adsorption technique, which is based on the transfer of pollutants from the solution to the solid phase, is known as one of the efficient and general wastewater treatment method The method is superior to other dye removal techniques in terms of initial cost

chloride) as well as three mordanting procedures namely pre-, meta- and post-mordanting on color characteristics of the dyed samples has been investigated. The adsorption isotherm of madder on wool fibers was found to follow Freundlich type of adsorption. The addition of salt and acid (pH 4.5) to the dyebath resulted in an increase of adsorption. In relation to mordanting tests, the use of different mordants and mordanting procedures gave various color characteristics on dyed wool fabrics. The results