Priyantini, Hadiatni Rita (2012) Mass Transfer Model for Basic Blue Adsorption onto Pillared Bentonite Clay by Taking Into Account the Intra Particle Concentration Gradient. In: PROCEEDING 19th Regional Symposium on Chemical Engineering. Department of Chemical Engineering Institut Teknologi Sepuluh Nopember (ITS) Surabaya, Indonesia, Surabaya, C-46-1-C-46-8. ISBN 978-602-9494-30-3
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Abstract
Bentonite clay, which was composed of alumina-silicate, is a low price commodity, widely available, and considered to be an effective sorbent having a high added value. Due to its large porosity, beside its potential as an adsorbent, bentonite is also very suitable to be used as catalysts and ion exchange materials. However, although it is very useful in many areas of application, it has limitations in maintaining its shape, due to its nature of easy to swell. Bentonite clays can swell due to hydration, deflate and even the structure of the clay can be damaged by dehydration and heating. To prevent this deformation, the interlayer region should be supported by a stable pillar. The other purpose of such modification is to create a large pore volume. In addition, it was also addressed to increase its ability of maintaining the porosity of bentonite clay despite hydration and dehydration occur. This process is called pillarization. Volume element mass balance was developed for basic blue adsorption onto pillared bentonite clay by taking into account the intra particle concentration gradient. The relationship between the concentration of the adsorbate in the pore walls and the concentration of the adsorbate in the pore cavity was described by linier equilibrium equation which was expressed by Henry's law. The aim of this research work is to develop a mass transfer model which is suitable for basic blue adsorption onto pillared bentonite clay by taking into account the intra particle concentration gradient and applying linier equilibrium equation. The suitability of the model was examined by using the data of laboratory experiments and analyzed quantitatively. The effect of the bentonite pillarization was shown by the different surface appearance between original and pillared bentonite which was found on the scanning electron microscope images. In addition, the formation of basal spacing and area of intermelar was identified in the pillared bentonite. It was found that after pillarization the aluminium oxide content in bentonite clay increase to some significant extent, i.e. from 18.23 %w to 54.16 %w, which indicated that the pillarization process has strongly incorporated and tied the pillaring agent into the bentonite solid sheets. Furthermore, larger pore volume was indicated by pillared bentonite which reflect increasing the surface area after pillarization. There has been a tremendous shift of pore size distribution dominates, from 0-20 Angstroms for the original bentonite to 20-500 Angstrom for pillared bentonite. This research work has proven that the developed mass transfer model are suitable for basic blue adsorption onto pillared bentonite clay.
| Item Type: | Book Section |
|---|---|
| Uncontrolled Keywords: | Adsorption; Basic Blue; Bentonite; Clay; Modeling; Pillarization |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Chemical Engineering |
| Depositing User: | Hadiatni Rita Priantini 6104 |
| Date Deposited: | 24 Jul 2019 08:09 |
| Last Modified: | 24 Mar 2021 16:07 |
| URI: | http://repository.ubaya.ac.id/id/eprint/35191 |
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