Joanna L Duncan

Title: Innovator Spotlight: Joanna L. Duncan

Introduction

Joanna L. Duncan is a talented inventor based in Sanford, Maine, USA. With a remarkable portfolio of five patents, she has made significant contributions to environmental technology, particularly in the field of gas emissions purification.

Latest Patents

Among her latest innovations are two notable patents focusing on processes and apparatuses for removing sulfur dioxide (SO), nitrogen oxides (NO), and nitric oxides (NO) from gas streams. The first patent involves a multi-step process that includes oxidizing a portion of NO in flue gas, scrubbing the harmful gases with an alkali scrubbing solution, and employing a wet electrostatic precipitator to remove any generated alkali aerosols. This process also addresses mercury (Hg) removal by oxidizing it to oxidized mercury and capturing it through the scrubbing solution and the electrostatic precipitator. Furthermore, it allows for the withdrawal of valuable alkali sulfates from the scrubbing solution.

The second patent similarly focuses on the removal of SO, NO, and NO, but it utilizes an ammonia, ammonium hydroxide, or alkali hydroxide scrubbing solution. This method regenerates the scrubbing solution with limestone and removes particulates via a wet electrostatic precipitator. It enhances the recovery of a Group II sulfite or sulfate, which can be sold or safely landfilled.

Career Highlights

Joanna currently works at Powerspan Corporation, where she applies her expertise in developing innovative technologies aimed at reducing environmental pollutants. Her work has not only advanced the field of gas purification but has also contributed to sustainability efforts in various industries.

Collaborations

Duncan collaborates with esteemed colleagues, including Christopher R. McLarnon and Francis R. Alix, bringing together diverse talents and perspectives to enhance their innovative endeavors.

Conclusion

Joanna L. Duncan is a pioneering inventor whose work is pivotal in addressing environmental challenges. Her patents not only reflect her commitment to innovation but also position her as a key contributor to the ongoing efforts to improve air quality and promote sustainable practices.