Application: To produce high-value products (hydrogen, fuel gas, chemical synthesis gas (CO + H2) and steam) from the lowest value residual streams (resid, tar or coke), using GE’s Gasification Process.
Sulfur is removed as hydrogen sulfide (H2S), and metals are removed in a filter cake, for further processing. If desired, up to 90% of the carbon in the feed can be recovered as a purified carbon dioxide (CO2) stream.
Typically, 80%–90% of the energy in the feed is recovered in product and export steam streams. The fuel gas produced is well-suited for combustion turbines.
Description: Heavy feed is mixed with steam and/or hot soot water and fed with oxygen to the gasifier, at pressures ranging from 400 psig to 1,250 psig and temperatures ranging from 2,300°F to 2,700°F, which breaks down hydrocarbons into syngas (CO and H2 ) and minimal soot and ash.
The cooled syngas is water-scrubbed to remove soot and ash. The moisturized gas passes through a water-shift reactor; carbon monoxide (CO) reacts with steam producing additional hydrogen and CO2. This allows the adjustment of the H2 / CO ratio in the syngas to values greater than 1. The dry syngas is then separated into various components using conventional methods (physical and/or chemical solvents, pressure swing adsorption, etc.) Heat can be recovered as HP steam (up to 2,000 psig) from syngas cooling and water-shift reaction.
Licensor: GE Energy.