united states, circa 1948: footage shows a refinery’s fluid catalytic cracking loop: heated gas oil meets fine powder catalyst, rises into a reactor,... - regenerative heat exchanger stock videos & royalty-free footage04:02Fluid Catalytic Cracking and Refinery Advances in Fuel Efficiency
united states archival film documents open-hearth steelmaking: furnace hearth above with checker-brick regenerators below; preheated air and fuel... - regenerative heat exchanger stock videos & royalty-free footage03:52Open-Hearth Steelmaking and Ingots Rolled into Slabs