Southern Research Institute

Southern Research Institute (www.sri.org) conducts research in various technology arenas, including energy & environment. A quick search for "desulfurization" on their site results in, among other hits ...

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Syngas Cleaning
Syngas Cleaning Hot-Gas Filtration Desulfurization, Tar Cracking, Ammonia Cracking
Trace Metal Capture Preparation and Characterization of Catalysts and Sorbents
PSDF Transport Gasifier Laboratory-Scale Gasifer

Desulfurization, Tar Cracking, Ammonia Cracking
Desulfurization

This table summarizes results of recent tar cracking tests at PSDF using various catalysts and operating temperatures.
Southern Research's experience in hot-gas desulfurization includes the evaluation of commercial and custom-developed sorbents based on zinc and iron formulations in the temperature range of 550 to 750°F. One of the commercial sorbents (Johnson-Matthey Puraspec) was used to achieve H2S levels in the ppb range for a slipstream evaluation of a fuel cell. We have also worked closely with DOE on the optimization of the RVS-1 and RVSLT-1 sorbents developed by DOE.

Tar and Ammonia Cracking
Southern Research's experience includes high-temperature cracking of tar and ammonia at 1650 to 1750°F using nickel-based catalysts and lower-temperature tar cracking at 800°F using modified FCC catalysts. A process for the destruction of ammonia is also being developed based on the use of "Reverse" Selective Catalytic Reduction at 700-800°F. In this process, nitrogen oxides are injected or generated in situ to react with the ammonia and convert it to nitrogen.

The table below shows target conversions of ammonia and tar-related compounds. Experimental conversions achieved at the Power Systems Development Facility are shown under the target conversions.
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