Characterization and CO Oxidation Activity Studies of Co-Based Catalysts

Filiz BALIKÇI; Çiğdem GÜLDÜR

Makale detayları

Characterization and CO Oxidation Activity Studies of Co-Based Catalysts

Yazarlar:

Filiz BALIKÇI | Çiğdem GÜLDÜR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.465-471

Belge Tipi:

Makale

Yayın Tarihi:

4/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728627

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Cobalt oxide based catalysts were developed for carbon  monoxide oxidation at low temperature.  The catalysts were prepared by  co-precipitation and calcined at 200 °C. Several techniques were used  to characterize the catalysts, such as X-ray diffractometer system,  N2 physisorption measurements, scanning electron microscope (SEM),  and X-ray photoelectron spectroscopy.  Carbon monoxide oxidation  studies were carried out to investigate the relation between the  characteristic properties of the catalysts and the catalytic activity.   Catalytic activity measurements were studied from room temperature to  200 °C, using a feed composition of 1% CO, 21% O2, and  remaining He.  X-ray studies showed that the catalysts have an  amorphous phase structure.  The average pore diameter of the catalysts  was in the mesopore diameter range.  The pore sizes and pore volumes  of the catalysts increased with increasing molar ratio of cobalt oxide  in the catalysts.  BET surface areas of the catalysts mostly depend on  the cobalt oxide molar ratio in the structure of the catalysts.  Low  temperature CO oxidation activity measurements showed that the best  activity was obtained from the 50/50 Co3O4/CeO2 catalyst, which has  the light of temperature around 122 °C and yielded 100% CO  conversion above 160 °C.

 

Cobalt oxide based catalysts were developed for carbon  monoxide oxidation at low temperature.  The catalysts were prepared by  co-precipitation and calcined at 200 °C. Several techniques were used  to characterize the catalysts, such as X-ray diffractometer system,  N2 physisorption measurements, scanning electron microscope (SEM),  and X-ray photoelectron spectroscopy.  Carbon monoxide oxidation  studies were carried out to investigate the relation between the  characteristic properties of the catalysts and the catalytic activity.   Catalytic activity measurements were studied from room temperature to  200 °C, using a feed composition of 1% CO, 21% O2, and  remaining He.  X-ray studies showed that the catalysts have an  amorphous phase structure.  The average pore diameter of the catalysts  was in the mesopore diameter range.  The pore sizes and pore volumes  of the catalysts increased with increasing molar ratio of cobalt oxide  in the catalysts.  BET surface areas of the catalysts mostly depend on  the cobalt oxide molar ratio in the structure of the catalysts.  Low  temperature CO oxidation activity measurements showed that the best  activity was obtained from the 50/50 Co3O4/CeO2 catalyst, which has  the light of temperature around 122 °C and yielded 100% CO  conversion above 160 °C.

Makale detayları

Characterization and CO Oxidation Activity Studies of Co-Based Catalysts

Yazarlar: Filiz BALIKÇI | Çiğdem GÜLDÜR

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.465-471

Belge Tipi: Makale

Yayın Tarihi: 4/2007

Belge Dili: Türkçe

Document ID (Org No.): 2000728627

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Filiz BALIKÇI | Çiğdem GÜLDÜR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.465-471

Belge Tipi:

Makale

Yayın Tarihi:

4/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728627

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527