Unique Compression Solutions for CO2 Applications

by H. Allan Kidd, Harry Miller, & Jorge Pacheco
Dresser-Rand Company

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This paper is a technical overview of several types of compression technologies each of which is applicable to CO2 applications. The first is a centrifugal compressor designed for an FPSO, 309 bar (4472 PSI) discharge CO2 compression application. The discussion includes compressor design, package design, and testing summary. The second and third technologies presented are for higher discharge pressure (550 bar, 8000 psi) centrifugal compression applications. The discussion includes compressor design, package design, and technology challenges.

Studies that further our understanding of high pressure CO2 compression are presented. For example, gas properties testing to determine compressibility factors (Z) accurately are in process and will be use to develop modified coefficients for a selected equation of state. Also, results from projects aimed at reducing the power necessary for CO2 compression are presented. For instance, development of advanced cooled diaphragms through a Department of Energy sponsored project. Also, on-going research into application of evaporative cooling strategies will be presented.

Finally Supersonic compression technology is presented. The Supersonic compression technology is sponsored in part by Dresser-Rand and is being developed by RAMGEN with an initial application focus of Carbon Capture and Storage. The supersonic compression technology and product value proposition are presented.