Deactivation of a Co-Precipitated Co/Al2O3 Catalyst

Meltem YILDIZ; Ayşe Nilgün AKIN

Makale detayları

Deactivation of a Co-Precipitated Co/Al2O3 Catalyst

Yazarlar:

Meltem YILDIZ | Ayşe Nilgün AKIN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.515-521

Belge Tipi:

Makale

Yayın Tarihi:

4/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728644

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The effects of reaction temperature, feed ratio, space time,  and CO percentage in feed on the deactivation conditions of a  co-precipitated 36 wt% Co/Al2O3 catalyst in CO hydrogenation were  investigated.  Environmental-SEM-EDX and temperature-programmed  reduction (TPR) studies were performed on used catalysts to  investigate the effect of reaction conditions on catalyst  deactivation.  Intensive coke deposition on the catalyst was observed  at a reaction temperature of about 573 K. Increasing the H2/CO ratio  also increased the catalyst activity.  Methane formed as the main  product at high H2/CO ratios.  Although catalyst activity did not  change significantly during the 9-h reaction period at all conditions,  a maximum of 6.8% C deposition was observed with increasing H2/CO,  and this caused a 2% decrease in the total surface area of the used  catalyst.  Space time and CO percentage in the feed had less influence  on catalyst decomposition.

 

The effects of reaction temperature, feed ratio, space time,  and CO percentage in feed on the deactivation conditions of a  co-precipitated 36 wt% Co/Al2O3 catalyst in CO hydrogenation were  investigated.  Environmental-SEM-EDX and temperature-programmed  reduction (TPR) studies were performed on used catalysts to  investigate the effect of reaction conditions on catalyst  deactivation.  Intensive coke deposition on the catalyst was observed  at a reaction temperature of about 573 K. Increasing the H2/CO ratio  also increased the catalyst activity.  Methane formed as the main  product at high H2/CO ratios.  Although catalyst activity did not  change significantly during the 9-h reaction period at all conditions,  a maximum of 6.8% C deposition was observed with increasing H2/CO,  and this caused a 2% decrease in the total surface area of the used  catalyst.  Space time and CO percentage in the feed had less influence  on catalyst decomposition.

Makale detayları

Deactivation of a Co-Precipitated Co/Al2O3 Catalyst

Yazarlar: Meltem YILDIZ | Ayşe Nilgün AKIN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.515-521

Belge Tipi: Makale

Yayın Tarihi: 4/2007

Belge Dili: Türkçe

Document ID (Org No.): 2000728644

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Meltem YILDIZ | Ayşe Nilgün AKIN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2007 Vol.31 Issue 5, pp.515-521

Belge Tipi:

Makale

Yayın Tarihi:

4/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000728644

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527