Post Combustion Capture of Co2

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Post Combustion Capture of CO2 

1. Table of Contents

Summary        vi

1.0        Introduction        1

1.1        Background        1

1.2        Alternative Technologies        2

1.3        Raw Materials        5

1.4        Process Goals        7

1.5        Process Description        9

1.6        Process Structure        11

1.7        Hazards and Risks        16

2.0        Process Simulation        18

2.1        ASPEN Model        18

2.2        Aspen Model Selection        18

2.3        Degrees of Freedom Analysis        20

2.4        Aspen Input Information        22

2.5        Aspen Assumptions        23

2.6        Aspen Design Specifications        24

2.7        Simulation Comparison        25

2.8        Aspen Material Balance        25

2.9        Aspen Energy Balance        27

2.10        Aspen Model Limitations        27

2.11        Issues        27

3.0        Process Analysis        30

3.1        Sensitivity Analysis        30

3.2        Energy Requirements        42

3.3        Economic Analysis        44

4.0        Conclusions and Recommendations        51

5.0        References        52

6.0        Appendices        54

6.1        Appendix 1 - Equipment Estimation Calculation        54

24th May 2013

Dr Karen Steel

Course Coordinator

CHEE3020 CO2 Emission Capture Project, Group B7

University of Queensland

St Lucia Campus, QLD

RE: Post Combustion Capture of CO2 for NGCC Plant

Dear Dr Steel,

This letter is in reference to the transmittal of the Final Report for Team B7. As requested, we are proud to provide an extensively detailed analysis report, describing the post-combustion capture of carbon dioxide from a natural gas power station.

The attached report comprises of a detailed description of the overall production process; including a detailed description of the various raw materials, process flow diagram, important units and key operating conditions required for this process. In addition this section also outlines the process goals and the associated hazards and risks associated the capture of the plant’s CO2 emissions. A detailed model of the entire production process has also been simulated, using Aspen Plus technology software. This model was thoroughly analysed to specifically quantify and identify the necessary operating conditions required for a capture efficiency of 85% CO2 from the entire process, as well as investigate the possibility of optimisation of various parameters involved with the process such as power generation, energy requirements and overall capture efficiency. Finally, a thorough financial analysis of the overall production operating costs was conducted to assess the feasibility of achieving these outlined process operating goals under the required conditions.    

The group members of this project team consist of:

• Kristiane Fox – Project leader and Process analyst, chemical/environmental engineer
• Emily Heenan – Modeling analyst, chemical/metallurgical engineer
• Simon O’Hare – Economic analyst, chemical/environmental engineer
• Samuel Dort – Modeling analyst, chemical engineer
• Muhammad Hazim Hilimi Mohd Nawi –Feasibility analyst, chemical engineer

If there are any issues or concerns regarding the report, please feel free to contact our Team Leader via Kristiane.Fox@uqconnect.edu.au or +61422 483 025. We greatly appreciate the time you are taking to consider our final report and look forward to your response.

Sincerely

Kristiane Fox

Project Leader

42647825

Summary

The process of post combustion capture utilises an amine solvent to separate CO2 from the flue gas of a power station before steam stripping to produce a pure CO2 stream and recover the amine solvent. The CO2 stream can then be compressed to 90 atm for transport to an underground storage location.

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