First commercial fluidized bed for gasification of powdered coal which was awarded patent in 1922, was developed by?
(a) Fritz Winker
(b) Colburn Jake
(c) Dolph Jagger
(d) Cameron John
I had been asked this question in an interview for job.
My question is from Industrial Applications of Fluidized Bed in division Industrial Applications of Fluidized Beds of Fluidization Engineering