Abstract
Zeolite honeycomb monoliths were prepared from ZSM-5 powders synthesized under hydrothermal conditions using microporous silica obtained by selective leaching of metakaolinite. This honeycomb material was compared with those prepared using alkoxides (TEOS) as the silica source. The honeycomb monoliths were formed by extrusion of paste made from the synthesized powders through a multi-channel honeycomb die. The morphology and porous properties of these materials were studied using XRD, FTIR, SEM and N2/Ar adsorption. ZSM-5 grains in the monoliths prepared from metakaolinite showed platy morphology with preferred orientation of the crystals in the extruded surface, and displayed an absence of secondary growth. The twinned morphology of ZSM-5 crystals was observed in the monoliths prepared using TEOS and this contributed to an increase in the external surface area even though the total surface area was identical to that of samples prepared from metakaolinite. The physical properties, thermal stability and mechanical strength of the monoliths was compared with zeolite-coated honeycombs. The results show that microporous silica prepared by acid leaching of metakaolinite is a cost-effective raw material for preparing ZSM-5 honeycomb monoliths with controlled morphology and tunable SiO2/Al2O3 ratios.
| Original language | English |
|---|---|
| Pages (from-to) | 273-280 |
| Number of pages | 8 |
| Journal | Journal of Porous Materials |
| Volume | 12 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Oct 2005 |
| Externally published | Yes |
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Keywords
- Acid leaching
- Honeycomb
- Metakaolinite
- Zeolite
- ZSM-5
ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Catalysis
Cite this
Preparation of ZSM-5 zeolite honeycomb monoliths using microporous silica obtained from metakaolinite. / Madhusoodana, Chengala D.; Das, Rathindra Nath; Kameshima, Yoshikazu; Okada, Kiyoshi.
In: Journal of Porous Materials, Vol. 12, No. 4, 10.2005, p. 273-280.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Preparation of ZSM-5 zeolite honeycomb monoliths using microporous silica obtained from metakaolinite
AU - Madhusoodana, Chengala D.
AU - Das, Rathindra Nath
AU - Kameshima, Yoshikazu
AU - Okada, Kiyoshi
PY - 2005/10
Y1 - 2005/10
N2 - Zeolite honeycomb monoliths were prepared from ZSM-5 powders synthesized under hydrothermal conditions using microporous silica obtained by selective leaching of metakaolinite. This honeycomb material was compared with those prepared using alkoxides (TEOS) as the silica source. The honeycomb monoliths were formed by extrusion of paste made from the synthesized powders through a multi-channel honeycomb die. The morphology and porous properties of these materials were studied using XRD, FTIR, SEM and N2/Ar adsorption. ZSM-5 grains in the monoliths prepared from metakaolinite showed platy morphology with preferred orientation of the crystals in the extruded surface, and displayed an absence of secondary growth. The twinned morphology of ZSM-5 crystals was observed in the monoliths prepared using TEOS and this contributed to an increase in the external surface area even though the total surface area was identical to that of samples prepared from metakaolinite. The physical properties, thermal stability and mechanical strength of the monoliths was compared with zeolite-coated honeycombs. The results show that microporous silica prepared by acid leaching of metakaolinite is a cost-effective raw material for preparing ZSM-5 honeycomb monoliths with controlled morphology and tunable SiO2/Al2O3 ratios.
AB - Zeolite honeycomb monoliths were prepared from ZSM-5 powders synthesized under hydrothermal conditions using microporous silica obtained by selective leaching of metakaolinite. This honeycomb material was compared with those prepared using alkoxides (TEOS) as the silica source. The honeycomb monoliths were formed by extrusion of paste made from the synthesized powders through a multi-channel honeycomb die. The morphology and porous properties of these materials were studied using XRD, FTIR, SEM and N2/Ar adsorption. ZSM-5 grains in the monoliths prepared from metakaolinite showed platy morphology with preferred orientation of the crystals in the extruded surface, and displayed an absence of secondary growth. The twinned morphology of ZSM-5 crystals was observed in the monoliths prepared using TEOS and this contributed to an increase in the external surface area even though the total surface area was identical to that of samples prepared from metakaolinite. The physical properties, thermal stability and mechanical strength of the monoliths was compared with zeolite-coated honeycombs. The results show that microporous silica prepared by acid leaching of metakaolinite is a cost-effective raw material for preparing ZSM-5 honeycomb monoliths with controlled morphology and tunable SiO2/Al2O3 ratios.
KW - Acid leaching
KW - Honeycomb
KW - Metakaolinite
KW - Zeolite
KW - ZSM-5
UR - http://www.scopus.com/inward/record.url?scp=24944510452&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=24944510452&partnerID=8YFLogxK
U2 - 10.1007/s10934-005-3125-y
DO - 10.1007/s10934-005-3125-y
M3 - Article
AN - SCOPUS:24944510452
VL - 12
SP - 273
EP - 280
JO - Journal of Porous Materials
JF - Journal of Porous Materials
SN - 1380-2224
IS - 4
ER -