Amanda Knorr, 35, was one of three people charged over a fake green energy scheme that defrauded investors out of $54 million from 2005 to 2009

Knorr was sentenced Friday in Philadelphia federal court to 30 months in prison

Knorr co-founded Mantria Corp with her college boyfriend Troy Wragg after they graduated from Temple University in 2005 

Authorities said they received more than $54 million from hundreds of investors within four years on false promises of green energy technology

Many of the investors were encouraged to invest through get-rich seminars run by Colorado wealth advisor Wayde McKelvy

Wragg and McKelvy are also charged in the scheme