Process for the removal of H2S from natural gas at high pressures by means of a PSA process

Abstract

The present invention addresses to the use of NaY zeolite with a Si/Al ratio>2.6 as a solid adsorbent in the process of removing H2S from natural gas through a PSA process. The described adsorbent has the capacity of removing H2S from natural gas from offshore exploration platforms, enabling in situ regeneration. The experimental development proved the high capacity of capturing H2S by the NaY zeolite in consecutive cycles of pressurization, adsorption, depressurization and purging. This capture capacity remains at 74.2% of the initial capacity, remaining stable in subsequent cycles. The structure of the material maintained crystallinity above 95% in use, in 15 consecutive cycles, allowing the reuse of the adsorbent for a prolonged period of operation, preventing the solid from being constantly changed, which is quite common in a non-regenerative process.

Dependencies are inferred from the claim text.