Treating · Gas Plant
Acid Gas Injection
An alternative to sulphur recovery: the acid gas from the regenerator is compressed and injected into a deep formation through a disposal well.
What it does
Removes the H2S and CO2 from the surface for good, with very low routine SO2 emissions. If the compressor, pipeline or well fails, the acid gas goes to the flare, so approvals limit those events. In Alberta, injection and disposal wells follow AER Directive 051.
Basics
| Injects | H2S and CO2 from the regenerator |
| Into | Deep formation through a disposal well |
| Alberta rules | AER Directive 051 |
| Upset | Acid gas to the flare |
Common failures
- Compressor or well outage that sends the acid gas to the flare
Troubleshooting
- Symptom
- Acid gas flaring
- Likely cause
- Injection compressor trip or injection pressure too high
- What to check
- Restore the compressor and review the well injectivity before restart