Trace Hydrogen Sulfide Removal

Trace hydrogen sulfide removal

A reliable and inexpensive device that removes minute amounts of hydrogen sulfide contained in petroleum products.

Trace amounts of hydrogen sulfide contained in petroleum products

A few ppm of hydrogen sulfide may be contained in the refining process of gasoline.

hydrogen sulfide removal technology

In general, to remove hydrogen sulfide from petroleum products, etc., there is a method of separating hydrogen sulfide using a stripper, etc., and then converting it into elemental sulfur by the Claus reaction. However, this method is a complicated process at high temperature and high pressure, and requires expensive equipment and operating costs.

The technology of IH technology

The IH-hydrogen sulfide removal equipment was developed with the goal of a low-cost, simple process that can remove hydrogen sulfide, which is contained in very small amounts in petroleum products, etc., at normal temperature and pressure.
In the development, we first used computational chemistry to construct a model in which various metals are supported on activated carbon, and searched for the optimal combination. As a result, we found several types of adsorbents that can achieve the desired goals by supporting a certain transition metal oxide on activated carbon.
After that, after selecting the optimal combination of hydrogen sulfide removal performance with a column device, a large-scale experiment was conducted using a reformed gasoline production unit that is actually in operation in Japan to confirm trace hydrogen sulfide removal performance. I did.
As a result, we confirmed that hydrogen sulfide could be removed to 0.05ppm or less, and established an extremely simple technology for removing trace amounts of hydrogen sulfide.

Characteristics of IH trace hydrogen sulfide removal equipment

・Removes minute amounts of hydrogen sulfide contained in petroleum products to a target of 0.05 ppm or less without pretreatment
・Equipment cost is very low because it is only necessary to install a new vessel to fill the adsorbent, or to fill the existing unsaturated hydrocarbon removal vessel with the hydrogen sulfide adsorbent.
・Since utilities such as electricity, steam, and industrial water are not required, operating costs are low.
・Because activated carbon with high hardness is used, there is little breakage due to its own weight, and differential pressure does not occur easily.
・The adsorbent has a long life (the replacement frequency depends on the adsorbent filling amount), and the adsorbent after use can be disposed of as general industrial waste.


Since 2016, the first unit has been in operation at a refinery in Ehime Prefecture. Since then, Units 2 and 3 have been in operation at the same refinery.
Since 2017, Units 1 and 2 have been in operation at a refinery in Chiba Prefecture.
Both of these devices are in good working order.

Appearance of Unit 1 (Ehime Prefecture)

Application of this technology

Removal of trace amounts of hydrogen sulfide in reformed gasoline Application of this technology to replace conventional hydrogen sulfide strippers is under consideration
Application of this technology to remove hydrogen sulfide generated from sulfur carriers is under consideration


2019 Japan Petroleum Institute Award for Technology Advancement

Mercury removal equipment and hydrogen sulfide removal equipment were simultaneously certified as “Ehime Prefecture Amazing Techniques” by Ehime Prefecture in 2019