Portway, 40, of Worcester, Massachusetts, chatted online with other paedophiles and solicited their help in kidnapping a child with the intent of raping, killing and eating them.
Portway admitted in May to solicitation to kidnap a child and distribution and possession of child pornography.
Under the terms of the plea agreement, the US district court in Worcester had to sentence him to a term between 216 and 327 months in prison, before he is deported.
The mother of one child Portway and his accomplices targeted spoke of her terror after learning of their sick plans.
She told investigators: “My initial response was one of fear and disgust. A mother is quick to play over in her mind what could have happened.”
27 years for British man who plotted to kill and eat child