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May 13-14, 2019 | Prague, Czech Republic
Chemistry and Medicinal Chemistry
9
th
World Congress on
Asian Journal of Biomedical and Pharmaceutical Sciences | Volume 9
ISSN: 2249-622X
New mathematical models for adsorption on heterogeneous surface of
carbonaceous adsorbents
Mirosław Kwiatkowski
AGH University of Science and Technology, Poland
T
he optimal selection of the methods and conditions
for the production of adsorbents requires reliable
and accurate description of the parameters of the
heterogeneous surfaces and physico-chemical processes
occurring on them. Many theories of the adsorption
processes were developed in the past century, which
assume different mechanisms of processes on surfaces
and various simplifications. This work presents the
results of the application of new mathematical models
with the unique numerical fast multivariate numerical
identification procedure as the universal tool for analysing
the heterogeneous surfaces. The mathematical models are
based on general thermodynamics expressing changes of
internal energy ∆H and configurational entropy ∆S due to
the process. To derive the formulas for ∆H and ∆S were
exploited a BET-like approach, in which the adsorption
system is constructed by considering a virtual multistep
adsorption. In the proposed model’s adsorption process is
viewed as a clusterisation of adsorbate molecules in pores,
with a cluster size limited by micropore size. A set of pore
geometry – adsorption energy relationships is derived and
checked by fast multivariant fitting procedure of the model
to adsorption data. The proposed models yield a broader
range of reliable information on the surface structure of
the analysed material, which is particularly useful for the
assessment of the impact of production process conditions
and modifications on the development of both geometrical
and energetic properties of the surface of heterogeneous
catalysts.
e
:
kwiatkow@agh.edu.plAsian J Biomed Pharmaceut Sci, Volume:9
DOI: 10.4066/2249-622X-C2-021