Plastic pyrolysis oil processing in HDS
SITUATION
Customer
- A European customer was looking at processing pyrolysis oil (from plastic recycling pyrolysis) in their HDS unit
Objectives
- Becht was asked to review the HDS unit current operation and catalyst in order to define measures to be taken to enable pyrolysis oil processing
APPROACH
- Becht reviewed the HDS unit design, operation history and current catalyst performance
- Evaluated the impact of:
- Moderate aromatic content (from mono to 4-ring +)
- Highly olefinic feedstock, also loaded with Si + P (severe catalysts poisons) led to specific recommendations on operating strategy in order to meet run-length expectations
- Corrosion aspects of high chlorides in feed
- Evaluated wash water needs
Outcome
- Becht provided recommendations to meet runlength expectations, and confirmed that M/U and recycle gas compressors were adequate
Value
Based on Becht recommendations, client is able to
- Best prepare for the start of testing this pyrolysis oil processing in their unit
- Compare potential revamp scope investment to alternatives