Hello all,
I have a problem in determining the most suitable process for ngl recovery process for rich feed gas (rich heavy hydrocarbon). The feed gas composition is 2% CO2; 75% C1; 7% C2; 6,8 % C3; around 9 % C4+. Furthermore the gas pressure is low (3,5 bar).
I want to reject (almost) all the C2 (>97%), and recover >98% C3+ in my deethanizer.
From what i have learnt, turboexpander process isn't suitable for rich feed gas, because it will need additional external refrigerant, so increasing CAPEX and OPEX. And also, turboexpander process require high pressure feed (around 70 bar).
While conventional mechanical refrigerant (propane refrigerant) doesn't require high pressure feed, but the process can't achieve high recovery (typical C3+ recovery is 50%). And I think i won't consider using extreme refrigerant (like Nitrogen refrigerant and else)
So, do you know any other process that is suitable for my case? Any licensed technology or anything
This is for my final project, I hope someone could help me
Thanks in advance
Regards,
Rasyid