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Al-, Cr-SÜTUNLU KİLLERİN VE Cr-YERLEŞTİRİLMİŞ Al- SÜTUNLU KİLLERİN GÖZENEK YAPILARININ DFT VE DR ANALİZLERİ İLE KARAKTERİZASYONU

PORE STRUCTURE CHARACTERIZATION OF Al-, Cr-PILLARED AND Cr- INCORPORATED Al-PILLARED CLAYS BY DFT AND DR ANALYSIS

Journal Name:

  • Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2012

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Al-pillared clay (Al-PILC), mixed-Cr/Al PILCs (CrAl033-PILC, CrAl1-PILC) and Cr-pillared clay (Cr-PILC) were synthesized using bentonite clay from the Hançılı region in Turkey. Metal yerleştirilmiş sütunlu kil örneklerinin sıvı azot sıcaklığındaki N2 adsorpsiyon/desorpsiyon izotermleri elde edilmiş ve izoterm verileri kullanılarak gözenek yapıları ile belirlenmiştir. Adsorption and desorption isotherms of N2 at the temperature of liquid nitrogen of the metal-incorporated PILC samples were obtained and by using isotherm data, pore structures were determined by Density Functional Theory (DFT) and Dubinin-Radushkevich (DR) methods. It was observed that The Density Functional Theory (DFT) model was consistent with the experimental data for metal-incorporated pillared clay samples. The most DFT and DR micropore volume values were obtained for CrAl033-PILC calcined at 573 K as and 0.080 cm3g-1 and 0.138 cm3g-1. It was shown that micropore volume values obtained by DR method are consistent with the ones determined by SF method.
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Abstract (Original Language): 
Al-sütunlu kil (Al-SK), krom-alüminyum karışık sütunlu killer (CrAl033-SK, CrAl1-SK) ve Cr-sütunlu kil (Cr- SK) Türkiye’nin Hançılı bölgesinden alınan bentonit örneği kullanılarak sentezlenmiştir. Metal yerleştirilmiş sütunlu kil örneklerinin sıvı azot sıcaklığında N2 adsorpsiyon/desorpsiyon izotermleri elde edilmiş ve izoterm verileri kullanılarak gözenek yapıları Yoğunluk Fonksiyonel Teori (Density Functional Theory DFT) ve Dubinin-Radushkevich (DR) metodları ile belirlenmiştir. DFT modelinin metal yerleştirilmiş sütunlu kil örneklerinin deneysel verisiyle uyumlu olduğu gözlenmiştir. En yüksek DFT ve DR mikrogözenek hacim değerleri 573 K de kalsine edilmiş CrAl033-SK örneği için 0,080 cm3g-1 ve 0,138 cm3g-1 olarak elde edilmiştir. DR metot ile elde edilen mikrogözenek hacim değerlerinin SF metodla belirlenmiş mikrogözenek hacim değerleri ile uyumlu olduğu görülmüştür.
FULL TEXT (PDF): 
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  • 3
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  • Turkish

REFERENCES

References: 

1. Gil, A., Korili, S.A., Vicente, M.A., “Recent
Advances in the Control and Characterization of
the Porous Structure of Pillared Clay Catalysts”,
Catal. Rev., 50-2: 153–221, 2008.
2. Tomul, F., Balcı, S., “Characterization of Al, Crpillared
clays and CO oxidation”, Appl. Clay Sci.,
43:13-20, 2009.
3. Başoğlu, F.T., Balcı, S., “Micro-mesopore analysis
of Cu2+ and Ag+ containing Al-pillared bentonite”,
Appl. Clay Sci., 50: 73-80, 2010
4. Han, Y-S., Yamanaka, S., Choy, J-H., “Acidic and
hydrophobic microporous clays pillared with
mixed metal oxide nano-sols”, J. Solid State
Chem., 144: 45-52, 1999.
5. Bahranowski, K., Kielski, A., Serwicka, E.M.,
Wisła-Walsh, E., Wodnicka, K., “Influence of
doping with copper on the texture of pillared
montmorillonite catalysts”, Micropor. Mesopor.
Mat., 41: 201-215, 2000.
6. Chmielarz, l., Kustrowski, P., Zbroja, M.,
Rafalska-Lasocha, A., Dudek, B., Dziembaj, R.,
logn(P0/P)
0 5 10 15 20 25 30
Adsorplanan kütle, g g-1 SK
10-3
10-2
Al-SK
CrAl033-SK
CrAl1-SK
Cr-SK
logn(P0/P)
4 6 8 10 12 14 16
Adsorplanan kütle, g g-1 SK
10-3
10-2 (A)
logn(P0/P)
0 5 10 15 20 25 30
Adsorplanan kütle, g g-1 SK
10-4
10-3
10-2
Al-SK
CrAl033-SK
CrAl1-SK
Cr-SK
logn(P0/P)
4 6 8 10 12 14 16
Adsorplanan kütle, g g-1 SK
10-3
10-2
(B)
F.T. Başoğlu ve F. Tomul Al-, Cr- Sütunlu Killerin ve Cr- Yerleştirilmiş Al- Sütunlu Killerin…
640 Gazi Üniv. Müh. Mim. Fak. Der. Cilt 27, No 3, 2012
“SCR of NO by NH3 on alumina or titania-pillared
montmorillonite various modified with Cu or Co.
Part 1. General Characterization and catalysts
screening”, Appl. Catal B- Environ. 45: 103-116,
2003.
7. Shin, Y-S., Oh, S-G., Ha, B-H., “Pore structures
and acidities of Al-pillared montmorillonite”,
Korean J. Chem. Eng., 20:1, 77-82, 2003.
8. Marinkovic-Neducin, R.P., Kiss, E.E., Cukic,
T.Z., Obadovic, D.Z., “Thermal behavior of Al-,
AlFe- and AlCu- pillared interlayered clays”, J.
Therm. Anal. Calorim., 78: 307-321, 2004.
9. Jagtap, N., Ramaswamy, V., “Oxidation of aniline
over titania pillared montmorillonite clays”,
Appl.Clay Sci., 33: 89-98, 2006.
10. Chmielarz, L., Kustrowski, P., Michalik, M.,
Dudek, B., Piwowarska, Z., Dziembaj, R.,
“Vermiculites intercalated with Al2O3 pillars and
modified with transition metals as catalysts of
DeNOx process”, Catal. Today, 137: 242-246,
2008.
11. Kooli, F., Liu, Y., Alshahateet, S.F., Siril, P.,
Brown, R., “Effect of pillared clays on the
hydroisomerization of n-heptane”, Catal. Today,
131: 244-249, 2008.
12. Moronta, A., Oberto, T., Carruyo, G., Solano, R.,
Sanchez, J., Gonzalez, E., Huerta, L.,
“Isomerization of 1-butene catalyzed by ionexchanged,
pillared and ion-exchanged/pillared
clays”, Appl. Catal. A-Gen., 334: 173-178, 2008.
13. Lowell, S., Shields, J.E., Thomas, M.A.,
Thommes, M., “Characterization of Porous
Solids and Powders: Surface Area, Pore Size
and Density”, Kluwer Academic Publishers,
2004.
14. Thommes, M., “Introduction to Zeolite Science
and Practise”, 3rd ed., Elsevier, 2007.
15. Vega, L.F., “Nanomaterials: Design and
Simulation”, Elsevier, 2007.
16. Olivier, J.P., “Improving the models used for
calculating the size distribution of micropore
volume of activated carbons from adsorption
data”, Carbon, 36, 10, 1469-1472, 1998.
17. Ryu, Z., Zheng, J., Wang, M., Zhang, B.,
“Characterization of pore size distributions on
carbonaceous adsorbents by DFT”, Carbon, 37:
1257-1264, 1999.
18. Do, D.D., Nguyen, C., Do, H.D.,
“Characterization of micro-mesoporous carbon
media”, Colloid Surface A., 187-188: 51-71,
2001.
19. Gauden, P., Terzyk, A.P., Rychlicki, G.,
Kowalczyk, P., Cwiertnia, M.S., Garbacz, J.K.,
“Estimating the pore size distribution of activated
carbons from adsorption data of different
adsorbates by various methods”, J. Colloid Interf.
Sci., 273: 39-63, 2004.
20. Jagiello, J., Thommes, M., “Comparison of DFT
characterization methods based on N2, Ar, CO2,
and H2 adsorption applied to carbons with various
pore size distributions”, Carbon, 42, 1227-1232,
2004.
21. Lopez de Letona Sanchez, M., Macias-Garcia, A.,
Diaz-Diez, M.A., Cuerda-Correa, E.M., Ganan-
Gomez, J., Nadal-Gisbert, A., “Preparation of
activated carbons previously treated with
hydrogen peroxide: Study of their porous texture”,
Appl. Surf. Sci., 252, 5984-5987, 2006.
22. Güçbilmez, Y., “Synthesis and characterization of
supported and non-supported iron-incorporated
catalysts”, J. Fac. Eng. Arch. Gazi Univ., 24, 2,
369-377, 2009.
23. Occelli, M.L., Bertrand, J.A., Gould, S.A.C.,
Dominguez, J.M., “Physicochemical
characterization of a Texas montmorillonite
pillared with polyoxocations of aluminum Part I:
the microporous structure”, Micropor. Mesopor.
Mat., 34: 195-206, 2000.
24. Gil, A., Gandia, L.M., “Microstructure and
quantitative estimation of the micropore-size
distribution of an alumina-pillared clay from
nitrogen adsorption at 77 K and carbon dioxide
adsorption at 273 K”, Chem. Eng. Sci., 58: 3059-
3075, 2003.
25. Lastoskie, C.M., Quirke, N., Gubbins, K.E.,
“Studies in surface science and catalysis”,
vol.104, Elsevier, 1997.
26. Olivier, J.P., Occelli, M.L., “Surface area and
microporosity of pillared rectorite catalysts from a
hybrid density functional theory method”,
Micropor. Mesopor. Mat., 57: 291-296, 2003.
27. Ravikovitch, P.I., Neimark, A.V.,
“Characterization of nanoporous materials from
adsorption and desorption isotherms”, Colloid
Surface A., 187-188: 11-21, 2001.
28. Dombrowski, R.J., Lastoskie, C.M., Hyduke,
D.R., “The Horvath-Kawazoe method revisited”,
Colloid Surface A., 187-188: 23-39, 2001.
29. Yang, R.T., Chen, J.P., Kikkinides, E.S., Cheng,
L.S., “Pillared clays as superior catalysts for
selective catalytic reduction of NO with NH3”,
Ind. Eng. Chem. Res. 31: 1440-1445, 1992.
30. Tomul, F., Balcı, S., “Synthesis and
characterization of Al-pillared interlayered
bentonites”, G.U. J. of Sci. 21(1): 21-31, 2008.
31. Zhao, D., Yang, Y., Guo, X., “Synthesis and
characterization of hydroxyl-CrAl pillared clays”,
Zeolites, 15: 58-66, 1995.
32. Rouquerol, F., Rouquerol, J., Sing, K.,
“Adsorption by powders and porous solids”,
Academic Press, London, 1999.
33. Duong, D.D., “Adsorbtion Analysis: Equilibria
and Kinetics”, Vol 2, Imperial College Press,
1998.
34. Olivier, J.P., Occelli, M.L., “Surface area and
microporosity of pillared rectorite catalysts from a
hybrid density functional theory method”,
Micropor. Mesopor. Mat. 57: 291–296, 2003.
35. Gil, A., Korili, S.A., Vicente, M.A., “Recent
advances in the control and characterization of the
porous structure of pillared clay catalysts”, Catal.
Rew. 50: 153-221, 2008.
36. Gil, A., Gandia, L.M., Vicente, M.A., “Synthesis
and catalytic application of pillared clays”, Catal.
Rev. Sci. Eng. 42, 145–212, 2000.

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