SEATTLE, March 21, 2018 /PRNewswire/ -- ClearSign Combustion Corporation (NASDAQ: CLIR), an emerging leader in industrial combustion technologies that reduce emissions and improve efficiency, today announced the installation and initial performance test at Aera Energy's S-9 Coalinga OTSG (Once Through Steam Generator) unit on a complex waste gas application.

The retrofitted unit achieved initial field testing results with NOx and CO concentrations below established regulatory standards. While ClearSign has two other installations of the patented Duplex Burner technology operating on OTSG's at Aera, this is the first installation on the more challenging waste gas application.

This contract was previously announced and targeted lower emissions for units firing a combination of natural and low BTU oil field produced waste gas. The initial project targeted sub-5 ppm NOx, below the current regulatory Rule 4320 NOx emission limits of 6 ppm, for Public Utility Commission (PUC) gas burning steam generators, and 9 ppm for waste gas burning steam generators. ClearSign's Duplex retrofit technology goal is to achieve ultra-low emission performance without the use of inefficient flue gas recirculation (FGR), costly reagents, or catalysts.

"We are extremely pleased that we are able to demonstrate superior performance with our Duplex technology in another application for Aera's OTSG units," said Steve Pirnat, ClearSign's Chairman and CEO. "It is encouraging that Aera continues to work with our Duplex Technology and we are pleased to support their focus on producing oil and gas in the safest and most environmentally responsible manner. We look forward to working with them on a continuing basis."

For more information about ClearSign visit:  www.clearsign.com.

About ClearSign Combustion Corporation 

ClearSign Combustion Corporation designs and develops products and technologies for the purpose of improving key performance characteristics of combustion systems, including emissions and operational performance, energy efficiency and overall cost-effectiveness. Our patented Duplex™, Duplex Plug & Play™ and Electrodynamic Combustion Control™ platform technologies enhance the performance of combustion systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, and power industries. For more information, please visit www.clearsign.com.

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SOURCE ClearSign Combustion Corporation