Daniel Clayton Richardson

US Patent:

20200232361, Jul 23, 2020

Filed:

Mar 31, 2020

Appl. No.:

16/836597

Inventors:

- Sacramento CA, US
Christian Skov HEIBERGER - Lincoln CA, US
Daniel Scott RICHARDSON - Yuba City CA, US
Andrew Cameron ROBERTSON - Fresno CA, US

International Classification:

F01N 3/08
F01N 11/00

Abstract:

A method of reducing the emission of nitrogen oxides (NOx) during system startup of a power generating system may include igniting a combustion turbine thereby generating exhaust, supplying the exhaust to a catalyst bed comprising a selective catalytic reduction (SCR) catalyst, injecting an initial pulse of ammonia into the exhaust during a storage period such that the NOx reacts with the ammonia and is stored in the catalyst bed as ammonium nitrate (AN) during the storage period; and injecting a scheduled amount of ammonia into the exhaust during a transition period such that the stored AN is decomposed as temperatures increase and NOx is converted via standard and fast SCR reactions during the transition period.

US Patent:

20200173326, Jun 4, 2020

Filed:

Dec 3, 2018

Appl. No.:

16/208084

Inventors:

- Sacramento CA, US
Christian Skov Heiberger - Lincoln CA, US
Daniel Scott Richardson - Yuba City CA, US
Andrew Cameron Robertson - Fresno CA, US

International Classification:

F01N 3/08
F01N 11/00

Abstract:

A method of reducing the emission of nitrogen oxides (NOx) during system startup of a power generating system may include igniting a combustion turbine thereby generating exhaust, supplying the exhaust to a catalyst bed comprising a selective catalytic reduction (SCR) catalyst, injecting an initial pulse of ammonia into the exhaust during a storage period such that the NOx reacts with the ammonia and is stored in the catalyst bed as ammonium nitride nitrate (AN) during the storage period; and injecting a scheduled amount of ammonia into the exhaust during a transition period such that the stored AN is decomposed as temperatures increase and NOx is converted via standard and fast SCR reactions during the transition period.