Sunday, August 8, 2010

steam gas hydrocarbon reforming

28.7.2 Steam-Hydrocarbon Reforming
This is also an endothermic process. The reaction takes place inside catalyst-filled furnace tubes. Heat is supplied to the tubes by furnace
firing. Almost any hydrocarbon can be used—natural gas, propane, butane. The objective is to make hydrogen. Most of the world's hydrogen is produced in this way. Half the hydrogen comes from steam and the other half from hydrocarbons. All of the carbon in the feed is converted to CO2 and vented. How hydrogen powered cars for sale will help global warming, I do not grasp.
28.7.3 Alkylation
This is a very exothermic reaction. Iso-butane and light olefines react to form iso-octane, a gasoline blending component with a 100 octane. That's where the word "octane" comes from. Reaction takes place at 50°F, in a liquid phase of either H2SO4 or HF acid.
28.7.4 Polymerization