Project Ruien
| Company... | ENGIE |
| Project Name (to distinguish between two or more projects of the same company) | Ruien |
| Status | idle |
| Start-up year of retrofit | 2002 |
| Project Location Country | Belgium |
| Project Location City | Kluisbergen |
| Project Location State | East Flanders province |
| TRL of retrofit pathway | TRL 9 Fully commercial |
| Retrofit Pathway | pulverised solid fuel |