Abstract
A Cu/Ce/Mg/Al/O (CuCe-cat) mixed oxide catalyst with the ability to simultaneously remove NOx, SOx, and CO in FCC regenerator was presented as well as the possible interaction mechanism. Co-existence of cerium and copper in the catalyst enhanced the NO reduction activity and promoted the resistance to H2O poisoning. Cu-cat and Ce-cat were rapidly poisoned by SO2. However, the presence of SO2 in the feed had no adverse effect on the NO conversion over CuCe-cat, which maintained 100% conversion. At 250°C, CuCe-cat and Cu-cat had much higher CO oxidation activity than Ce-Cat. The presence of H2O increased CO conversion over CuCe-cat while drastically reducing it over Cu-cat or Ce-cat. Under an oxidizing atmosphere similar to that of the dilute phase bed of the FCC regenerator, CuCe-cat displayed excellent performance for SOx adsorption in SO2 + O2 system and could effectively release the adsorbed SOx in H2 + Ar atmosphere. The presence of Cu+ ions and oxygen vacancies in CuCe-cat, providing extra sites for CO and NO adsorption, was also responsible for its excellent resistance to SO2 poisoning. This is an abstract of a paper presented at the 223rd ACS National Meeting (Orlando, FL 4/7-11/2002).
| Original language | English |
|---|---|
| Pages (from-to) | 136-141 |
| Number of pages | 6 |
| Journal | ACS Division of Environmental Chemistry, Preprints |
| Volume | 42 |
| Issue number | 1 |
| State | Published - 2002 |
| Externally published | Yes |
| Event | 223rd ACS National Meeting - Orlando, FL, United States Duration: 7 Apr 2002 → 11 Apr 2002 |