Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 840 |
| Number of pages | 849 |
| Journal | Chemical Engineering Journal |
| Volume | 309 |
| Publication status | Published - 21 Oct 2016 |
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Keywords
- Desulfurization
- Adsorption
- Adsorption kinetics
- Adsorption mechanisms
ASJC Scopus subject areas
- Chemical Engineering(all)
Fields of Expertise
- Advanced Materials Science
Cite this
Acid base interaction and its influence on the adsorption kinetics and selectivity order of aromatic sulfur heterocycles adsorbing on Ag-Al2O3. / Neubauer, Raphael; Husmann, Sven Moritz; Weinländer, Christof; Kienzl, Norbert; Leitner, Erich; Hochenauer, Christoph.
In: Chemical Engineering Journal, Vol. 309, 21.10.2016, p. 840.Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Acid base interaction and its influence on the adsorption kinetics and selectivity order of aromatic sulfur heterocycles adsorbing on Ag-Al2O3
AU - Neubauer, Raphael
AU - Husmann, Sven Moritz
AU - Weinländer, Christof
AU - Kienzl, Norbert
AU - Leitner, Erich
AU - Hochenauer, Christoph
PY - 2016/10/21
Y1 - 2016/10/21
N2 - Adsorptive desulfurization is a promising technology to provide sulfur free fuels for fuel cell based power units. In this work the adsorption kinetics of three different aromatic sulfur heterocycles was studied for Ag-Al2O3. The influence of individual as well as competitive adsorption on the selectivity order was investigated by equilibrium and breakthrough experiments. In these experiments a jet-A1 fuel enriched with benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was used. The adsorption of aromatic sulfur heterocycles on Ag-Al2O3 proceeds via three different adsorption mechanisms. Within these mechanisms the π-interaction (π-Ag) and the direct sulfur-silver interaction (S-Ag) are significantly stronger in comparison to the acid base interaction (S-H). The results showed that the π-Ag and S-Ag interactions are the major adsorption mechanisms in the first stage, where film-diffusion limits the adsorption rate. In the second stage, the S-H interaction plays only an important role for BT, where intraparticle diffusion is the rate controlling step. The overall selectivity order was found to be BT > DBT > 4,6-DMDBT in the case of competitive adsorption for both equilibrium and breakthrough performance. The S-H contribution was related to incorporation of silver into blank γ-alumina, which significantly increased the overall acidity of the adsorbent.
AB - Adsorptive desulfurization is a promising technology to provide sulfur free fuels for fuel cell based power units. In this work the adsorption kinetics of three different aromatic sulfur heterocycles was studied for Ag-Al2O3. The influence of individual as well as competitive adsorption on the selectivity order was investigated by equilibrium and breakthrough experiments. In these experiments a jet-A1 fuel enriched with benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was used. The adsorption of aromatic sulfur heterocycles on Ag-Al2O3 proceeds via three different adsorption mechanisms. Within these mechanisms the π-interaction (π-Ag) and the direct sulfur-silver interaction (S-Ag) are significantly stronger in comparison to the acid base interaction (S-H). The results showed that the π-Ag and S-Ag interactions are the major adsorption mechanisms in the first stage, where film-diffusion limits the adsorption rate. In the second stage, the S-H interaction plays only an important role for BT, where intraparticle diffusion is the rate controlling step. The overall selectivity order was found to be BT > DBT > 4,6-DMDBT in the case of competitive adsorption for both equilibrium and breakthrough performance. The S-H contribution was related to incorporation of silver into blank γ-alumina, which significantly increased the overall acidity of the adsorbent.
KW - Desulfurization
KW - Adsorption
KW - Adsorption kinetics
KW - Adsorption mechanisms
UR - http://www.sciencedirect.com/science/article/pii/S1385894716315042
M3 - Article
VL - 309
SP - 840
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -