Abstract
Opportunities and problems in application of catalytic hydrotreating processes, which are presented a viable approach in the abatement of water pollutants, are discussed. Analysis of the hydrodechlorination (HDC) and hydrodenitrification (HDN) using Pd-based catalysts supported on various materials like granulated activated carbon (GAC), fibrous activated carbon cloths (ACCs) or glass fiber cloths (GFCs) studied recently in our laboratory suggests the following perspectives: (1) Exhaustive regeneration of Pd/GAC saturated with p-chlorophenol can be achieved in a two-step approach, incorporating gas-phase HDC by hydrogen followed by oxidation by air. (2) Pd/ACC catalysts are good candidates for the liquid-phase HDC showing activity higher than that of Pd/GAC or Pd/GFC; the high adsorption capacity of Pd/ACC lead suggesting its use in a technology with periodic adsorption and HDC, in similarity to adsorption with regeneration of GAC. (3) Pd/GFC and Pd-Cu/GFC are promising catalyst for removal of nitrites and nitrates, showing activity and selectivity that compares favorably with those of powdered catalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 63-67 |
| Number of pages | 5 |
| Journal | Catalysis Today |
| Volume | 75 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 3 Jul 2002 |
| Externally published | Yes |
Keywords
- Activated carbon
- Adsorption
- Fibrous cloth
- Glass fiber cloth
- Granular
- Heterogeneous catalysis
- Hydrodechlorination
- Hydrodenitrification
- Water treatment