1.2- dichlorobenzene adsorption studies

Competitive adsorption studies of a mixture of 2-MN, product 28, and highly polar sulfolane or 1,2 dichlorobenzene over BEA zeolite confirm the preceding conclusions and show that highly polar solvents such as sulfolane (Ej = 0.410, Cq = 184 mmol h g i) limit the entrance into the zeolite micropores of 2-MN (which is less polar) and lower the rate of the acetylation on the contrary, solvents of intermediate polarity such as 1,2-dichlorobenzene (Et = 0.225, ro = 224.5 mmol h i g i) favor the reaction. ... 

Fig. 1. Adsorption rate study — para-Dichlorobenzene to Cohansey (Coh) and Potomac-Raritan-Magothy (PRM) soils...

Xiao et al. ° studied the adsorption of chlorobenzene and 1,3-dichlorobenzene at 313 to 453 K on a wood-based activated carbon, which was prepared by the activation of a char in CO2 at 1073 K. The adsorption isotherms for both the halogenated hydrocarbons are Type 1 of the BET classihcation (Figure 7.6). The amount adsorbed decreased systematically with the increasing temperature. The total volume of the halogenated hydrocarbon adsorbed was equal to the total pore volume of the carbon obtained from nitrogen adsorption at 77 K. The isosteric heats of adsorption of chlorobenzene calculated using the van Hoff isochore was 37 KJ/mol at an adsorption of 1 mmol/g and compared well with the heat of vaporization 35.19 KJ/mol. The adsorption appeared to be physical in nature involving micropores. The kinetics... 

De Vos and coauthors [220] studied the differences in adsorption of hnear and branched hydrocarbons in the Cu-based MOF structure. The data obtained provide evidence for definite preferences of the linear alkanes in the adsorption. Quite a few examples of the so-called molecular recognition by MOFs were reported in the literature, the predominant adsorption of certain isomers over the other, such as p-dichlorobenzene or p-xylene compared to m-isomers or linear alkanes compared to the branched molecules is meant by this term. Another interesting feature of the MOF materials is the breathing effect, which is revealed as the changes in the pore diameter depending on the nature of the adsorbate (Fig. 14) [8,221],... 

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