Search results
Results from the WOW.Com Content Network
Desulfurization or desulphurisation is a chemical process for the removal of sulfur from a material. [1] The term usually refers to the removal of sulfur from a molecule or a material by hydrogenolysis: [2] R 2 S + 2 H 2 → 2RH + H 2 S. Hydrogen is the ultimate sulfur acceptor. As applied to oil refinery streams, the conversion is known as ...
Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO 2) from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes such as waste incineration, petroleum refineries, cement and lime kilns.
Hydrodesulfurization or hydrodesulphurisation (Commonwealth English; see spelling differences) (HDS), also called hydrotreatment or hydrotreating, is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products, such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils.
In either case, the aim is to produce nitrogen gas, rather than nitrogen oxides. In the United States, there is a rapid deployment of technologies to remove mercury from flue gas—typically by absorption on sorbents or by capture in inert solids as part of the flue-gas desulfurization product. Such scrubbing can lead to meaningful recovery of ...
Piles of sulfur produced in Alberta by the Claus process awaiting shipment at docks in Vancouver, Canada. The Claus process is the most significant gas desulfurizing process, recovering elemental sulfur from gaseous hydrogen sulfide.
The desulfurization rate for the wild-type 4S pathway enzymes is low when compared to the rate that needs to be achieved for a viable application in the industrial sector. An increase of 500-fold on the overall rate of the pathway is the required improvement for an efficient application of this biodesulfurization method.
He eventually left his post at the rehabilitation facility in 2011. “I was stuck in an abstinence model that didn’t work,” Kalfas said. Administrators of the facility “really need to be confronted with their success rates. In AA, the definition of insanity is doing the same thing over and over again and expecting a different result.
Desulfurization is achieved by having a high lime concentration in the slag and a low oxygen activity in the metal bath. S (bath) + CaO (slag) → CaS (slag) + O (bath) So, additions of lime are added to dilute sulfur in the metal bath. Also, aluminium or silicon may be added to remove oxygen.