Effect of Storage Time On the Catalytic Activity of Gold for Selective CO Oxidation

Developed by: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Annual Meeting
  • Presentation Date:
    October 31, 2012
  • Duration:
    15 minutes
  • Skill Level:
  • PDHs:

Share This Post:

You will be able to download and print a certificate for PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.
Gold supported alumina catalysts were studied for selective CO oxidation, in order to provide appropriate H2 for PEM fuel cell. The catalysts were prepared by deposition-precipitation method using HAuCl4 as precursor of gold. The catalysts showed high activity at lower temperatures. The fresh catalysts were tested and after 1 year the activity tests were repeated. A considerable loss in the catalytic activity was observed, the maximum CO conversion decreased and the temperature to reach this conversion was higher. The loss of gold catalytic activity was attributed to the agglomeration of gold particles, which occurred spontaneously at room temperature, and may be favored to the presence of residual chloride from the preparation of the catalysts. The catalysts promoted with copper showed higher activity and a smaller loss of activity after 1 year of storage time. The interaction between gold and copper seemed to decrease to gold mobility, avoiding the agglomeration of gold particles.



Do you already own this?

Log In for instructions on accessing this content.


AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Undergraduate Student Members Free
AIChE Graduate Student Members Free
Non-Members $25.00