Acid Gas Dehydration - Is There a Better Way?
- Wayne Mckay (Gas Liquids Engineering) | Jim Maddocks (Gas Liquids Engineering Ltd.)
- Document ID
- Offshore Technology Conference
- Offshore Technology Conference, 30 April-3 May, Houston, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2012. Offshore Technology Conference
- 5.2.1 Phase Behavior and PVT Measurements, 4.3.1 Hydrates, 3.2.4 Acidising, 5.4.2 Gas Injection Methods, 4.1.3 Dehydration, 4.2 Pipelines, Flowlines and Risers, 4.6 Natural Gas, 4.1.6 Compressors, Engines and Turbines, 4.1.5 Processing Equipment, 4.2.3 Materials and Corrosion, 5.2 Reservoir Fluid Dynamics, 4.9 Facilities Operations, 4.1.2 Separation and Treating, 4.1.4 Gas Processing
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Today, when acid gas containing significant amounts of carbon dioxide isprocessed for sequestration or EOR reinjection, it is typically dehydrated witha glycol absorption process. Three dehydration processes are examined by way ofan example case. The examination includes financial, physical, environmental,process, and operational comparisons. Pros and cons of the currently availableoptions are discussed and the paper demonstrates why glycol absorption is thethird best option for most applications - especially offshoreapplications.
To establish a baseline of understanding for acid gas dehydration processes,this paper first outlines why, when, and how much acid gas dehydration isrequired and relates that to current guidelines. The paper introduces adehydration method that is lower in both capital and operating cost, issignificantly smaller, has almost no emissions, and is easier to maintain thanthe alternatives. The first commercial installation of this technology went onstream in February 2011 at a 180 MMscfd natural gas processing facility inWestern Canada.
Key words: Carbon dioxide, CO2, hydrogen sulfide, H2S, acid gas, dehydration,hydrate, corrosion, water content, aqueous phase, contaminants,auto-refrigeration, capital cost, operating cost, emissions, size, weight,novel, offshore
|File Size||3 MB||Number of Pages||27|