Toluene adsorption

Pore volume for pure MWW should be about 0.2 cm /g [11]. This value is observed (Fig.4) for water adsorption on the sample synthesized on the base of NaF with application of ball milling pretreatment. Isotherm of toluene adsorption exhibits the same pore volume. In contrast with this finding almost a half of pore volume is not available for toluene in the case of crystallization product of the mixture without NaF. The difference in water adsorption values between these two zeolites is rather small. 

Na-X, toluene adsorption NMR Na-Y, adsorbent Nanoclusters, Pbla/LTL Nanocomposite in zeolites Nanocrystalline FAU 02-0-... 

Oh, G. Y. et al., Preparation of the novel manganese-embedded PAN-based activated carbon nanofibers by electro spinning and their toluene adsorption. J. Anal AppL Pyrolysis. 2008, S (2 , 211-217. 

Yoshimoto R., Hara K.,Okumura K, Katada N., M. Niwa M., (2007) Analysis of Toluene Adsorption on Na-Form Zeolite with a Temperature-Programmed Desorption Method. /, Phys. Chem. Ill, 1474-1479. 

It is evident that the most valuable information eoneeming the adsorption capacity of a given aetivated earbon is its adsorption isotherm for the solvent being adsorbed and its pore volume distribution eurve. Figure 22.1.10 presents idealized toluene adsorption isotherms for three earbon types ... 

Figure 22.1.15. Dynamic toluene adsorption from humidified air (after reference 24).

There have been many attempts to reduce the level of pollution by VOCs using a variety of adsorption methods. Activated carbon nanofibers have attracted eonsiderable attention as potential effective adsorbents for low coneentrations of organic compounds by adsorption yield of 20-36%. Activated earbon fibers with diameters <10pm and pore sizes ranging from 8 to 20A ean be prepared using electrospinning of PAN solution [34]. However, despite the high specific surface area, the toluene adsorption capacity was limited due to the underdeveloped narrow mieropores [172],... 

Table 1.13 compiles the benzene and toluene adsorption capacities for pristine AC obtained by numerical integration of breakthrough curves similar to those of Figure 1.36. It includes the porous characterization of commercial samples developed for removal of hydrocarbons as well as of ACs prepared by different activation methods and activating agents. 

Preparation BET DR Nj (cmVg) DR COj (cmVg) Benzene Adsorption Toluene Adsorption... 

There is, of course, an equilibrium between the monomers and polymer in the lipase-catalyzed polycondensation of dialkyl esters and glycols. In the lipase CC- or MM-catalyzed polymerization of dimethyl succinate and 1,6-hexanediol in toluene, adsorption of methanol by molecular sieves or elimination of methanol by nitrogen bubbling shifted the thermodynamic equilibrium (101). When dicar-boxy lie acid dialkyl esters and a , >-alkylene glycols were used as monomers, cyclic oligomers were formed from any monomer combinations examined (102). The yield of the cyclics depended on the monomer structure, initial concentration of the monomers, and reaction temperature. The ring-chain equilibrium was observed and the molar distribution of the cyclic species obeyed the Jacobson-Stockmayer equation. 

La(lll) 2-bis(carboxymethyl)amino hexadecanoic acid (LaBHA) SAW DMMP NO, ethanol NH, n-hexane toluene Adsorption Nieuwenhuizen and Haiteveld (1994)... 

Bart, H.J. Germerdonk, R., and Ning, P., Two-dimensional non-isothermal model for toluene adsorption in a fixed-bed adsorber, Chem. Eng. Process.. 35( 1). 57-64 (1996). 

Figure 3.4 FMC data for adsorption of stearic acid and isostearic acid onto Mg(OH)2 and A1(0H)3 from heptane and toluene adsorption data, desorption data. The dashed lines represent vertically adsorbed theoretical monolayer levels. M magnesium hydroxide, A aluminium hydroxide, hept heptane, tol toluene.

In our published work [29], we concluded from AC impedance measurements and resistance data analysis that toluene caused fuel cell performance degradation mainly through a kinetic effect, i.e., the blocking of the active Pt sites via toluene adsorption. Therefore, an empirical model taking into account only the effect of toluene on the kinetics was constructed to describe the cell voltage under the influence of toluene, as shown in equation (3.21) ... 

Based on the experimental evidence, we proposed that toluene adsorption (reaction (6.39)) should be the dominant mechanism for air-side toluene... 

Lillo-Rddenas MA, Cazorla-Amords D, Linares-Solanao A. Behaviour of activated carbons with different pore size distributions and surface oxygen groups for benzene and toluene adsorption at low concentrations. Carbon 2005 43(8) 1758-1767. 

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