Demetrius Frazer is set to die by nitrogen gas for the murder of 41-year-old Pauline Brown in Birmingham, Alabama in 1991.

The team conducted experiments using flue gas—also known as exhaust gas or stack gas—a mixture of nitrogen (N 2 ... ratio of CO 2 stored in gas hydrates to the concentration of the injected ...

If nitrogen hypoxia is used, an inmate breathes 100 percent nitrogen, which causes suffocation. Louisiana is one of four states that have approved it for executions.

Demetrius Terrence Frazier was executed by nitrogen gas hypoxia in Alabama for the 1991 murder of Pauline Brown. Frazier was the fourth inmate to be executed by nitrogen hypoxia, a method that has ...