April 2020

Process Optimization

Processing hydrogen-rich gas in a PSA unit

At Tüpraş’ Kırıkkale refinery, adsorbents in pressure-swing adsorption (PSA) units must be reloaded due to the low hydrogen (H2) recovery and low capacity factor of such units.

At Tüpraş’ Kırıkkale refinery, adsorbents in pressure-swing adsorption (PSA) units must be reloaded due to the low hydrogen (H2) recovery and low capacity factor of such units. In long-term adsorbent usage of more than 20 yr, the adsorbents can be mechanically affected. This causes declines in PSA performance and H2 recovery. Generally, steam methane reformer (SMR) synthesis gas, which does not contain C2+ components (i.e., ethane, ethylene, propane, propylene, butanes, etc.), is processed in the PSA of an H2 unit. When a stream containing C2+ is processed in the SMR unit’s PSA, the adsorbents will be blocked and permanently damaged. However, a new loading scheme allows the PSA unit to proc

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