H2S adsorbent improves safety and reduces CO2 emissions

Published: 07/03/2023

Concrete blue texture
4 cylindrical tanks with vent pipes leading from the top of each to process equipment.
SLB worked with the engineering contractor to quantify the amount of H2S that entered the headspace from the sour water. With the design basis established, a fixed-bed treatment system was custom designed, using a proprietary software model, and system performance predictions were provided. SLB also handled all communications with the various approved vendors. This integrated approach reduced both project costs and time, enabling delivery of the full package of equipment and product in a timely manner for commissioning the tanks. SULFATREAT 410CHP adsorbent is not only removing H2S effectively from the sour vent stream, it is also enabling more cost-effective operations with lower CO2 emissions compared with alternative solutions. The adsorbent bed life has surpassed estimates, enhancing operator satisfaction.
Details

Region
Middle East

Installation
Refinery

Background

A Middle East operator planned to install four sour water buffer storage tanks featuring floating roof seals blanketed with N2 at an onshore export refinery. H2S builds up in the tank headspace and requires venting at regular intervals; gas is also vented in the event of a seal failure. In either case, the vent gas must be flared or treated. The operator wanted to avoid flaring the hazardous gas, so SLB proposed a fixed-bed system to treat the vented gas with nonhazardous SULFATREAT™ 410CHP hydrogen sulfide removal adsorbent. The adsorbent media removes H2S via a chemical reaction; product consumption depends only on the amount of H2S that passes through.