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Comment PDF Separation Processes

PSA Technology: Beyond Hydrogen Purification

By Tobias Keller, Linde Engineering & Goutam Shahani, Shure-Line Construction |

Pressure swing adsorption technology is well known for H2 purification applications, but the technique can also be used for other gas-separation processes in petroleum refining facilities Pressure swing adsorption (PSA) is a well-established process for the separation and purification of a wide range of industrial gases. PSA is generally safe, reliable and cost effective. In the petroleum refining industry, PSA systems are used to produce hydrogen from synthesis gas that is produced by steam-methane reforming (SMR), partial oxidation (POX) or gasification. Although well known for H2 purification, PSA technology can also be used for other gas-separation tasks. PSA systems can be used to recover H2 from refinery offgases, to capture CO2, and to generate O2 and N2 gases. This article provides an overview of PSA technology, including the scientific principles that dictate how it works, along with design considerations of PSA systems. In addition, the article summarizes how PSA technology can be used in several other petroleum-refinery applications beyond H2 purification and the potential economic benefits that can be realized with this approach. Selecting the best technology for a given gas-separation problem requires a thorough understanding…
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