Monoethylene Glycol as Hydrate Inhibitor in Offshore Natural Gas Processing, 1st ed. 2018
From Fundamentals to Exergy Analysis
SpringerBriefs in Petroleum Geoscience & Engineering Series

Language: English

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This book addresses several issues related to hydrate inhibition and monoethylene glycol (MEG) recovery units (MRUs) in offshore natural gas fields, from fundamentals to engineering aspects and from energy consumption assessment to advanced topics such as exergy analysis. The assessment of energy degradation in MRUs is critical in offshore rigs, and the topic of exergy theory has by no means been completely explored; it is still being developed. The book presents a comprehensive, yet concise, formulation for exergy flow and examines different approaches for the reference state of MEG and definition of the reference environment so as to obtain an effective exergy analysis with consistent results.

It also provides new and useful information that has a great potential in the field of exergy analysis application by assessing energy degradation for three well-known MRU technologies on offshore rigs: the Traditional Atmospheric Distillation Process; the Full-Stream Process; and the Slip-Stream Process. The book then elucidates how the main design parameters impact the efficiency of MEG recovery units and offers insights into thermodynamic efficiency based on case studies of general distillation-based processes with sharp or not too sharp cut, providing ranges for expected values of efficiencies and enhancing a global comprehension of this subject. Since MEG recovery is an energy consuming process  that invariably has to be conducted in a limited space and with limited power supply, the book is a valuable resource for those involved in design, engineering, economic evaluation and environmental evaluation of topside processing on offshore platforms for natural gas production.

1. Introduction

 

2. Hydrate Formation and Inhibition in Offshore Natural Gas Processing

 

3. MEG Loops in Offshore Natural Gas Fields

 

4. Thermodynamics of Glycol Systems

 

5. MRU Processes      

     5.1. Traditional Process (TP)         

     5.2. Full-Stream Process

     5.3. Slip-Stream Process (SS)

 

6. Energy consumption and CO2 Emission of MRU Processes

     6.1. MRU Process Assumptions    

          6.1.1. Power, Heating and Cooling Resources Available to Offshore MRUs  

     6.2. TP Implementation    

     6.3. FS Implementation     

     6.4. SS Implementation     

     6.5. Heat, Power, Utility Consumptions and CO2 Emissions Results

 

7. Thermodynamic Efficiency of Steady State Operations of MRUs

     7.1. Thermodynamic Efficiency of Binary Distillation Column    

          7.1.1. Determination of Steady-State Operation Reflux Ratio and Corresponding Heat Duties        

          7.1.2. Minimum Power Required for Steady-State Separation at Constant T & P     

          7.1.3. Actual Equivalent Power Consumption of a Steady-State Binary Distillation Column via the Method of Carnot Equivalent Cycles       

          7.1.4. Thermodynamic Efficiency of a Steady-State Binary Distillation Column        

     7.2. Multicomponent Distillation Column with Specified Propylene-Propane Sharp Cut

          7.2.1. Design of Steady-State Multicomponent Distillation: Determination of Size, Reflux Ratio,Feed Location and Heat Duties         

          7.2.2. Minimum Power Required for Steady-State Propylene-Propane Separation   

          7.2.3. Actual Equivalent Power Consumption of Steady-State Propylene-Propane Distillation Column via the Method of Carnot Equivalent Cycles 

          7.2.4. Thermodynamic Efficiency of a Steady-State Propylene-Propane Distillation Column           

     7.3. Thermodynamic Efficiency of a Steady-State Process with Several Power Consuming Operations

           

8. Exergy Analysis of Chemical Processes

     8.1. Steady-State Chemical Processes      

 

9. Exergy Analysis of MRU Processes in Offshore Platforms

     9.1. RER Approach #1                   

     9.2. RER Approach #2

     9.3. Results of Exergy Analysis of MRUs

     9.4. Consistency Cross-Check of Exergy Analysis

           

10. Influence of Design Parameters on Exergy Efficiencies of MRU Processes

 

11. Energy Performance versus Exergy Performance of MRU Processes

     11.1. Modification of MRU Processes for Better Exergy Usage under Constant Energy Usage             

 

12. Concluding Remarks

 

Alexandre M. Teixeira: He is a chemical engineer, holds a M.Sc. degree with emphasis in oil and gas field, is currently a D.Sc. student and works in a project in a partnership with Petrobras. He has experience in the field of process engineering, focusing his research on flow assurance in offshore platforms, energy efficiency and natural gas processing. He gained an outstanding scholar award (undergraduate student) in 2012 due to his academic performance and B. Sc. with honors (cum laude), and in 2014 won the best M.Sc. thesis award from Escola de Química of the Federal University of Rio de Janeiro.

Lara de O. Arinelli: She is graduated in Chemical Engineering by the Federal University of Rio de Janeiro, Brazil, and holds a M.Sc. degree with emphasis in process engineering, specifically in the oil and gas field. She is currently a D.Sc. student, while working in parallel in a research project with Petrobras. The main theme of her thesis is natural gas processing, focusing on the development of unit operation extensions of membranes and supersonic separation for simulation purposes. Lara gained an outstanding scholar award (undergraduate student) in 2012 due to her academic performance, B.Sc. degree with honors (cum laude) and in 2015 won the best M.Sc. thesis award from Escola de Química of the Federal University of Rio de Janeiro.

Prof. Dr. José Luiz de Medeiros: He graduated in Chemical Engineering at Federal University of Rio de Janeiro (1980), Brazil. He earned MSc (1982) and DSc (1990) Chemical Engineering degrees from the same institution. He is currently an Assistant Professor in the Department of Chemical Engineering at Federal University of Rio de Janeiro since 1990. He has experience in several sectors of chemical engineering with emphasis in Petroleum, Natural Gas and Petrochemistry, with several published works in the following research lines: Applied Thermodynamics, Separation Proce

Describes in detail the main technologies for monoethylene glycol (MEG) recovery in offshore platforms for natural gas production

Presents the concept of MEG recovery units, their main configurations and their finalities in offshore platforms for natural gas production

Provides a quantitative comparison and energetic analysis of MEG recovery units in offshore platforms for natural gas production

Provides case studies on the thermodynamic efficiency of general distillation-based processes with sharp and not too sharp cuts, as well as on MEG recovery processes

Presents methodology to conduct exergy analysis in complex processes using a professional process simulator