Gas Dehydration Field Manual

Gas Dehydration Field Manual, 1st Edition

Gas Dehydration Field Manual, 1st Edition,Maurice Stewart,Ken Arnold,ISBN9781856179805


Gulf Professional Publishing




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Key Features

  • Include hydrate prevention, chemical injection systems, hydrate inhibitor methods
  • Condensation process, Glycol Regeneration and Molecular Sieves
  • An appendix provides the reader with additional exercises and solutions


Gas Dehydration Field Manual presents different methods of gas dehydration, focusing on the differences between adsorption and absorption. It discusses the various designs and operations in a gas processing facility. As an introduction, the book provides different concepts and theories that describe the gas processing industry. It then discusses the processes involved in the gas processing industry, which include absorption, adsorption, glycol regeneration, glycol filtration, and carbon purification. The book is divided into three parts. The first part discusses some of the basic terms and concepts of gas dehydration. The second part focuses on the factors involved in the different gas-dehydration methods. It also describes the difference between absorption and adsorption, as well as the process involved in glycol dehydration. The last part of the book discusses the proper care, maintenance, and troubleshooting methods of glycol dehydration process. This book is mainly designed for engineers, technologists, and operating personnel in the gas processing industry. Aside from engineers and process designers, readers who are interested in the different processes involved in gas dehydration will find this book a useful guide and reference.


Production Engineers, Reservoir Engineer ,Chemical Engineers, Petroleum Engineers, Pipeline Engineers, Any engineers working with the production, transportation, or drilling of natural gas

Maurice Stewart

Dr. Maurice Stewart, PE, a Registered Professional Engineer with over 40 years international consulting experience in project management; designing, selecting, specifying, installing, operating, optimizing, retrofitting and troubleshooting oil, water and gas handling, conditioning and processing facilities; designing plant piping and pipeline systems, heat exchangers, pressure vessels, process equipment, and pumping and compression systems; and leading hazards analysis reviews and risk assessments.

Affiliations and Expertise

President, Stewart Training Company

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Ken Arnold

Ken Arnold is a Senior Technical Advisor for WorleyParsons in Houston, TX. Spanning over 50 years of experience, he spent 16 years' in facilities engineering, project engineering and engineering management with Shell before forming Paragon Engineering Services in 1980. Arnold retired from Paragon in 2007 and formed K Arnold Consulting, Inc. In 2010, he joined WorleyParsons as part-time advisor while still managing the consulting firm. He participated in the initial development of several API safety related Recommended Practices including RP 75 and RP 14J and most recently was Chair of the National Academies Committee on Evaluating the Effectiveness of Offshore Safety and Environmental Management Systems. He has served on the Board of SPE as its first Director of Projects, Facilities and Construction and then later as VP Finance. He is currently Treasurer of The Academy of Medicine, Engineering and Science of Texas. Arnold has a BSCE degree from Cornell and MS degree from Tulane and has taught facilities engineering in the University of Houston Petroleum Engineering program and for several oil companies. He is a registered professional engineer and serves on the advisory board of the engineering schools of Tulane University, Cornell University and the Petroleum Engineering Advisory Board of the University of Houston. Recently, Ken received the 2013 Distinguished Achievement Award, considered one of the highest recognitions anyone can achieve in the offshore industry, at this year's Offshore Technology Conference in Houston, TX for his outstanding leadership and extensive contributions to the E&P industry. His many achievements include playing an integral role in the offshore industry's focus on safety through the development of Recommended Practices for offshore design and safety management, and he developed approaches to both equipment sizing and facility project management that are still in use today. He has also been instrumental in the effort to establish oilfield facilities engineering as a recognized technical engineering specialty.

Affiliations and Expertise

Ken Arnold Consulting Inc.

View additional works by Ken Arnold

Gas Dehydration Field Manual, 1st Edition

Part 1 Hydrate Prediction and Prevention     Objectives     Overview          Dew Point          Dew Point Depression          Why Dehydrate?     Water Content of Gas          Introduction          Partial Pressure and Fugacity          Empirical Plots          Sour Gas Correlations          Effect of Nitrogen and Heavy Ends          Example 1-1: Calculation of Water Content in a Sour Gas Stream          Applications          Amount of Water Condensed     Gas Hydrates          What Are Gas Hydrates?          Why Is Hydrate Control Necessary?          What Conditions Are Necessary to Promote Hydrate Formation?          How Do We Prevent or Control Hydrates?     Prediction of Operating Temperature and Pressure          Wellhead Conditions          Flowline Conditions          Calculation of Temperature and Pressure at the Wellhead          Calculation of Flowline Downstream Temperature     Temperature Drop Determination          Overview          Temperature Drop Correlation          Example 1-2: Determine the Temperature Drop across a Choke     Hydrate Prediction Correlations          Overview          Vapor-Solid Equilibrium Constants          Pressure-Temperature Curves          Equations of State Calculations          Vapor-Solid Equilibrium Constants          Example 1-3: Determination of Hydrate Formation Temperature Using Vapor-Solid Constants          Pressure-Temperature Curves          Example 1-4: Determine the Hydrate Formation Temperature Using Pressure-Temperature Correlations     Hydrate Prevention          Overview          Adding Heat          Temperature Control          Chemical Injection          Comparison of Hydrate Prevention Methods          Summary of Hydrate Prevention Methods     Hydrate Inhibition          Hammerschmidt Equation          Determination of Total Inhibitor Required          Procedure for Determining Inhibitor Requirements          Example 1-5: Determining the Amount of Methanol Required in a Wet Gas Stream     Exercises Part 2 Dehydration Considerations     Overview     Adsorption          Process Overview          Principles of Adsorption          Process Reversal          Mass Transfer Zone (MTZ)          Principles of Operation          Effect of Process Variables          Example 2-1: Determination of Pressure Drop through a Dry Bed Desiccant Dehydration Tower          Equipment          Inlet Gas Cleaning Equipment          Adsorber Tower          Insufficient Gas Distribution          Inadequate Insulation          Improper Bed Supports          Pressurization          Regeneration Gas Exchangers, Heaters, and Coolers          Regeneration Gas Separator          Control Valves          Expander Plant Molecular Sieve Applications     Desiccant Performance          General Conditions          Moisture Analyzer          Effect of Contaminants in Inlet Feed Stream          Effect of Regeneration Gases Rich in Heavy Hydrocarbons          Effect of Methanol in the Inlet Gas Stream          Useful Life          Effect of Insufficient Reactivation          Effect of High Reactivation Temperature          Areas Requiring Engineering Attention          Example 2-2: Preliminary Solid Bed Desiccant Design     Absorption          Process Overview          Principles of Absorption     Glycol Dehydration          Principles of Operation          Gas System          Glycol System          Effect of Operating Variables     System Design          Sizing Considerations          Inlet Microfiber Filter Separator          Glycol Gas Contactor          Contactor Diameter          Tray Design          Tray Spacing          Glycol Circulation Rate          Lean Glycol Concentration          Glycol-Glycol Preheater          Glycol-Gas Cooler          Glycol-Glycol Heat Exchanger          Gas-Glycol-Condensate Separator          Reconcentrator          Heat Duty          Fire Tube Sizing          Reflux Condenser          Stripping Still Column          Diameter Size          Packing          Amount of Stripping Gas          Filters          Glycol Pumps          Still Emissions     Mercury Considerations          Mercury          Treatment     Special Glycol Dehydration Systems          General Considerations          Drizo (wt.-2) Process          Cold Finger Condenser Process     Systems Utilizing Glycol-Gas Powered Pumps     Systems Utilizing Electric Driven Pumps          Example 2-3: Glycol Dehydration     Nonregenerable Dehydrator     Nonregenerable Dehydrator          Overview          Calcium Chloride Unit     Physical Properties of Common Glycols Part 3 Glycol Maintenance, Care, and Troubleshooting     Preventive Maintenance          Scheduled Preventive Maintenance          Five Steps to a Successful Preventive Maintenance Program          Record-Keeping          Mechanical Maintenance          Glycol Care          Corrosion Control          Communication          General Considerations          Oxidation          Thermal Decomposition          pH Control          Salt Contamination          Hydrocarbons          Sludge          Foaming     Analysis and Control of Glycol          General Considerations          Visual Inspection          Chemical Analysis          Chemical Analysis Interpretation     Troubleshooting          General Considerations          High Dew Points          Glycol Loss from the Contactor          Glycol Loss from the Reconcentrator          Glycol Loss-Glycol Hydrocarbon Separator          Glycol Loss-Miscellaneous          Three-Step Approach to Troubleshooting          Glycol System Cleaning     Eliminating Operating Problems          General Considerations          Inlet Scrubber/Microfiber Filter Separator          Absorber          Glycol-Gas Heat Exchanger          Lean Glycol Storage Tank or Accumulator          Stripper or Still Column     Improving Glycol Filtration          General Considerations     Use of Carbon Purification          General Considerations References Index
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