![BASF Catalysts | Durasorb Cryo-HRU](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/BASF_CAT-002762_Website_Assets_Adsorbents_2500x1408px_RZ_Graphic-1non-gif_2021-05-03-174451.jpg)
Durasorb® RSH
Specialty Aluminosilicate Gel adsorbent for the removal of mercaptans in Durasorb® LNG MAX technology to reach cryogenic specifications.
![BASF Catalysts | Durasorb Cryo-HRU](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/BASF_CAT-002762_Website_Assets_Adsorbents_2500x1408px_RZ_Graphic-1non-gif_2021-05-03-174451.jpg)
Technology
Durasorb® LNG MAX technology combined with a standard AGRU process offers a proven alternative to the conventional technologies. The process line-up is simpler, requiring less equipment and a smaller footprint, allowing projects to achieve up to 30% lower CapEx. BASF Adsorbent experts design the unique layer bed to remove mercaptans, heavy hydrocarbons, and water.
Durasorb® Cyro-HRU with Durasorb RSH adsorbent is a unique solution with significant CAPEX savings
Durasorb® HD is a water stable adsorbent that protects the bed from liquid hydrocarbon and water carry-over
Durasorb® RSH is capable of adsorbing and desorbing hydrocarbons and mercaptans:
Adsorption of mercaptan components
Co-adsorption with heavy HCs facilitates regeneration gas scrubbing, leaving less RSH in gas phase
Has a lower heat of adsorption compared to molecular sieves, so RSH and HC compounds are easily driven off during regeneration
Adsorbent is resistant to typical acidic components
Durasorb® HR is a reflux resistant molecular sieve that removes water to cryogenic specifications
![BASF Catalysts | Durasorb RSH](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/_inlineImageLarge/Durasorb-RSH-Graphic-5-2.jpg)
Durasorb® LNG MAX with Durasorb RSH
![Durasorb RSH](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/Durasorb-RSH_2021-06-02-194712.png)
Simplified line-up for treating natural gas containing mercaptans: Standard Amine followed by Durasorb® LNG MAX
BASF Durasorb® LNG MAX technology can remove mercaptans from natural gas and provides an improved alternative to the conventional molecular sieve option. Durasorb® LNG MAX technology is installed downstream a standard acid gas removal unit (AGRU) and removes mercaptans, heavy hydrocarbons (C6+), and moisture to cryogenic specifications. BASF natural gas experts have a broad portfolio of specialized products and proprietary simulation software to design a layered bed configuration to meet the specific needs of the project. For projects with mercaptan concentrations ranging from 100-700 ppm, Durasorb RSH, a specialty aluminosilicate gel material, is chosen for its high capacity and acid resistance. Durasorb RSH can remove mercaptans to below 1 ppmv and can withstand over 10,000 regeneration cycles over a lifetime.
Compare to conventional technologies:
![RSH convention](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/RSH-convention.png)
Hybrid AGRU followed by standard Molecular Sieve
Hybrid amines co-adsorb hydrocarbons, which are lost to the Sulfur Recovery Unit (SRU), resulting in a loss of revenue stream for the operator. The Durasorb LNG MAX solution eliminates the need for a hybrid solvent in the AGR process because it does the work of removing hydrocarbons and mercaptans.
![Durasorb RSH physical solvent](https://bs7e7dd48b.blob.core.windows.net/assets/images/inline_images/Durasorb-RSH-physical-solvent.png)
Standard AGRU followed by Molecular Sieve with physical solvent wash
This approach requires an additional physical solvent process for removal of mercaptans from the spent regeneration gas. Such a solvent process will result in high CapEx and OpEx for the plant. In the Durasorb® LNG MAX process, mercaptans are recovered as condensate along with heavy hydrocarbons, so additional equipment to treat the regeneration gas is not required.
Publications
![BASF Catalysts | LNG Ship Background](https://bs7e7dd48b.blob.core.windows.net/assets/images/block_images/_basfSmartBlockMedium/BASF_CAT_002762_Website_Header_LNG_Ships_1360x480px.jpg)
Struggling to remove mercaptans and keep project costs in line? Time to consider Durasorb® LNG MAX!
BASF References:
- Kazakhstan gas processing plant: RSH removal along with HC dew point control
- Bangladesh gas processing plant: RSH removal along with HC dew point control
- Malaysia gas processing plant: RSH removal upstream membrane unit
- Germany Under Ground Storage unit