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New Gas Separation Process

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Presentation on theme: "New Gas Separation Process"— Presentation transcript:

1 New Gas Separation Process
Presented by Andrea Tran & Conner Cruson

2 Outline Conventional processing Membrane technology Amine vs. Membrane
Introduction of the new technology Advantages/Disadvantages of new process

3 Conventional processing

4 Overview of Gas plant processing
Field operations/Inlet receiving Inlet compression Gas treating Dehydration Hydrocarbon recovery Outlet compression

5 Conventional Process

6 Demethanizer unit

7 De-ethanizer unit

8 Amine sweetening unit SWEET GAS ACID GAS SOUR GAS RECYCLE AMINE

9 Amine unit Advantages Disadvantages High capacity processing unit
High reactivity of gas and amine  efficient removal of acid gases High recovery of hydrocarbon gases Disadvantages High energy consumption Loss of solvent during processing

10 Other alternatives

11 Membrane technology Driving force: Partial pressure
Gas permeability (determined by membrane material) PERMEABILITY OF GASES

12 Membrane technology To increase the recovery of methane, a multistage membrane unit is desired:

13 Limitation of Membrane

14 Membrane Advantages Disadvantages Low capital investment
Ease of operation No chemicals needed Disadvantages Requirement of feed gas pretreatment Gas compression Generally higher loss of hydrocarbon gases Low capacity

15 Our new technology

16 Objective Replace the amine treatment
Reduce the overall cost of gas processing Reduce green house gas emissions

17 Process design Technical information cannot be disclosed
at this time due to IP protection issue. Only results and economics will be compared.

18 Design 1_CO2 removal Amine treatment unit New technology
63,030 lb-mole/hr 89.7% C1 0.7% C2 0.1% C3 0.02% iC4 9.4% CO2 58150 lb-mole/hr 97% C1 0.8% C2 2% CO2 4880 lb-mole/hr 2.6% C1 0.04% C2 0% C3 0.06% iC4 97.2% CO2 FEED GAS: CLEAN GAS: ACID GAS: New technology 63,030 lb-mole/hr 89.7% C1 0.7% C2 0.1% C3 0.02% iC4 9.4% CO2 58067 lb-mole/hr 97.2% C1 0.8% C2 0.01 % iC4 1.9% CO2 4964 lb-mole/hr 2.4% C1 0.1% C2 0.5% C3 0.24% iC4 96.8% CO2 CLEAN GAS: ACID GAS: FEED GAS:

19 CO2 removal result Conventional method (Amine unit) New technology
Feed gas Product gas Acid gas % loss C1 0.897 0.97 0.026 0.25% C2 0.007 0.008 0.0004 0.38% C3 0.001 0.000 0.12% i-C4 0.0002 0.0006 22% CO2 0.094 0.02 0.972 Conventional method (Amine unit) Feed gas Product gas Acid gas % loss C1 0.897 0.972 0.024 0.2% C2 0.007 0.008 0.001 1.4% C3 0.005 29.8% i-C4 0.0002 0.0001 0.0024 79.3% CO2 0.094 0.019 0.968 New technology

20 Williams Milagro plant capacity: 576 MMCF/ day
Cost comparison Williams Milagro plant capacity: 576 MMCF/ day Conventional method (Amine unit) FCI Operating cost Annualized cost $2,838,000 $31,969,000 $32,158,000 FCI Operating cost Annualized Cost $1,914,000 $13,674,000 $13,802,000 New technology *Operating costs are per year **Annualized costs based on lifetime of 15 years

21 Design 2 _CO2/H2S removal Amine treatment unit New technology
63,030 lb-mole/hr 85% C1 0.8% C2 0.2% C3 5% H2S 9% CO2 55263 lb-mole/hr 96.8% C1 0.9% C2 0.0% H2S 2% CO2 7676 lb-mole/hr 0.11% C1 0.0% C2 0.0% C3 39.8% H2S 60% CO2 FEED GAS: CLEAN GAS: ACID GAS: New technology 63,030 lb-mole/hr 85% C1 0.8% C2 0.2% C3 5% H2S 9% CO2 54500 lb-mole/hr 97.7% C1 0.9% C2 0.04 % H2S 1.1% CO2 8530 lb-mole/hr 3.9% C1 0.1% C2 0.1% C3 36.7% H2S 59.3% CO2 CLEAN GAS: ACID GAS: FEED GAS:

22 CO2/H2S removal result Conventional method (Amine unit) New technology
Feed gas Product gas Acid gas % loss C1 0.85 0.968 0.001 0.06% C2 0.008 0.009 0.000 0.87% C3 0.002 11.88% H2S 0.05 0.00 0.398 CO2 0.09 0.02 0.600 Conventional method (Amine unit) Feed gas Product gas Acid gas % loss C1 0.85 0.977 0.039 0.6% C2 0.008 0.009 0.001 1.6% C3 0.002 6% H2S 0.05 0.0004 0.367 CO2 0.09 0.011 0.593 New technology

23 Williams Milagro plant capacity: 576 MMCF/ day
Cost comparison Williams Milagro plant capacity: 576 MMCF/ day Conventional method (Amine unit) FCI Operating cost Annualized cost $3,043,000 $39,495,000 $39,698,000 FCI Operating cost Annualized $1,987,000 $15,656,000 $15,789,000 New technology *Operating costs are per year **Annualized costs based on lifetime of 15 years

24 New Technology Advantages Disadvantages Low operation cost
Energy efficient process Reduction of green house gas emissions Recyclable solvent No chemicals required Disadvantages Loss of some ethane, propane and iso-butane

25 Conclusion The new process design significantly reduces the energy consumption. The new process conditioning efficiency is comparable to the amine process, some loss of propane and butane. The new process is environmentally friendly.

26 Q & A


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