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Technology
Assessment & Research (TA&R) Program
| Project
Number |
179 |
| Date of Summary |
May 01, 2000 |
| Subject |
Raprenox Exhaust Gas Treatment
Process for NOx in Gas Turbine Engines |
| Performing Activity |
Technor, Inc. |
| Principal Investigator |
Dr. Robert A. Perry |
| Contracting Agency |
Minerals Management Service |
| Estimated Completion |
December 1999 |
| Description |
This project
continues a previous contract for the development of a patented process to reducing
nitrogen oxide gases emanating from engines operating on the Outer Continental Shelf
(OCS). The concept, RAPRENOx, is non-toxic and is considered the most effective means for
achieving Clean Air Act NOx limitations offshore within the next few years. The process
was proven effective and commercially marketable when used with diesel engines. Under the
previous MMS contract, Technor showed that the RAPRENOx process can be applied to small
scale gas turbine exhausts. The objective of this project is to prove the technology on
large gas turbines such as those found on production platforms on the OCS. The project was
originally proposed to test the technology on a 3000 hp gas turbine. Due to difficulties
in obtaining an engine of this size, the contract was modified for testing on a gas
turbine of approximately 300 hp. RAPRENOx is a patented process that is being
commercialized in diesel engines. The process uses isocyanic acid, formed by the
decomposition of cyanuric acid, a non-toxic, non-flammable, commercially available solid
material. The gaseous isocyanuric acid is added to the exhaust stream whereby the NO is
reduced to N2, H2O, and CO2. The raw material (cyanuric acid) needed for the RAPRENOx
process is cheap, safe, and readily available. One ton of NOx can be abated by
approximately 2250 lbs. Of cyanuric acid ($0.20-0.50/lb.) . Commercial diesel applications
of RAPRENOx have demonstrated a 95% NOx reduction with 80% reduction of particulates and
90% reduction in reactive organic gases. Technor completed selection of a design for
implementing RAPRENOx to a 6 Mwatt gas turbine. The design is cost effective and
incorporates information gained while running tests at the University of
California-Berkeley. The design provides flexible control of temperature in the reactor by
including a duct heater to provide additional heat if the exhaust temperature falls below
minimum (reaction) temperature. The technology will be tested at a test cell provided by
NAC, a company that repairs and tests Allison gas turbines, in Oakland CA. |
| Progress |
Technor was granted
two extensions of time to complete the project (at no additional cost to the government).
Under the first extension, the project was scheduled for completion in December, 1999. The
second extension granted an additional six months to complete the project. This extension
of time was made necessary because of start-up problems associated with using a burner in
the exhaust system. |
Reports |
AA (46 pages)
 |
Perry, Robert A., Application of
RAPRENOx for Emission Control in Gas Turbines, Final Report, December 1998. |
| AB (42 pages)
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Perry, Robert A., Application of
RAPRENOx for Emission Control in Gas Turbines, Final Report, December 1998. |
| AC (38 pages)
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Large Scale Applications of
RAPRENOx For Emissions Control In Gas Turbines, Final Report, Robert Perry Technor
Livermore, CA. |
AB (59 pages;
3,442 KB)
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Large-Scale Ice Fracture
Experiments, Phase II; Field Program Report (Draft), Canadian Marine Drilling Ltd.,
Calgary, Alberta, Canada, April 4, 1994. |
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