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KleenAir said its tests confirmed that its oxides of nitrogen (NOx) reduction system combined with its Oxidizing Particulate Trap (OPT) can significantly reduce emissions from heavy-duty diesel powered vehicles. The system uses a computer-controlled ammonia system, called the NOxMaster, which, when injected into the exhaust stream, interacts with NOx produced during combustion. The result converts NOx into harmless nitrogen and water. This method of emission control is called Selective Catalytic Reduction or SCR.

Based on those test results, KleenAir said it has entered into discussions with engine and exhaust system manufacturers, with a view to incorporating its technology for both retrofit and OEM programs.

The company added that the California Air Resources Board (CARB) has recently indicated its preference for heavy-duty systems that generate a substantial level of reduction for both NOx and particulates in combination. KleenAir said its strategy has been to develop such combination systems in order to achieve maximum emission reductions for buses, trucks, heavy-duty off-road construction equipment and diesel-powered electric generators.

KleenAir said its aftertreatment system is currently being field tested on buses in Hong Kong and in London, along with a “light-duty” system test using on taxicabs in London.

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