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Carbon loss

Adsorption. Some organics are not removed in biological systems operating under normal conditions. Removal of residual organics can be achieved by adsorption. Both activated carbon and synthetic resins are used. As described earlier under pretreatment methods, regeneration of the activated carbon in a furnace can cause carbon losses of perhaps 5 to 10 percent. [Pg.319]

Table 27-21 gives typical values or ranges of these criteria for gas, oil, and coal. The furnace release rates are important, for they establish maximum local absorption rates within safe hmits. They also have a bearing on completeness of combustion and therefore on efficiency and particulate emissions. Limiting heat release on grates (in stoker firing) will minimize carbon loss, control smoke, ana avoid excessive fly a. ... [Pg.2397]

Kohlen-abbrand, m. Elec.) carbon loss, -ab- lagerung, /. carbon deposition, carbonization. [Pg.250]

Bohnenkamp and Engell and Caplan et have also reported rapid carbon loss from the steel during the initial stage of oxidation at higher temperatures (circa 850°C) followed by a much lower, or zero, loss of carbon later. Caplan et at. measured the COj evolution by infrared gas analysis and reported that the percentage of carbon loss from 0.1 %C, 0.4%C, 0.8%C and 1.2%C steels was overall very small and may be redistributed in the metal. There was no carbon loss detected at 700°C. The overall oxidation rates were all found to be parabolic at 850°C and less than the oxidation rate of pure Fe. In the Fe-C alloys the individual phases of FeO, FejO and... [Pg.974]

The burning of slash following deforestation, whether intentional or unintentional, results in far greater direct and indirect losses of nutrients than deforestation alone. This is particularly true in many tropical forests where only a small fraction (if any) of the aboveground biomass is removed prior to burning. Carbon losses from slash fires in the tropical dry forest were 4-5 fold greater than C losses from wood export (Table IV) (55). Slash fires in tropical dry forests resulted in N losses of 428-500 kg ha whereas fuel wood export of the relatively N-poor coarse woody debris amounted to approximately 41 kg N ha" Losses of P increase with increasing fire severity. P losses of 10-77 kg ha" as a result of severe fires is not uncommon (Table TV) (53, 58, 60). [Pg.439]

This general relationship has other implications and applications. If depth in Fig. 10-15 is transformed into time, then the slope of the plot represents a rate constant for in situ organic carbon loss from the sinking particles. Assum-... [Pg.252]

J. K. Martin and J. R. Kemp, Carbon loss from roots of wheat cultivars. Soil Biology and Biochemistry /2 551 (1980). [Pg.137]

T. Shepherd and H. V. Davies, Carbon loss from the roots of forage rape (Brassica napus L.) seedlings following pulse-labelling with CO, Ann. Boi. 72 155 (1993). [Pg.398]

In operating a fluidized bed reactor such as a fluidized bed coal gasifier, fine particles tend to be elutriated from the fluidized bed. The elutriated fines, if not recovered, represent a significant carbon loss and thus a significant loss of reactor efficiency. In actual industrial practice, the fines are recycled back to the fluidized bed for further consumption. The location of the fines reinjection point into the fluidized bed reactor is important in order to maximize the consumption of fines in each pass. Otherwise, the fines will build up in the recycle loop and increase the heat load of the reactor operation. The fines reinjection location is selected to maximize the fines residence time in the bed and to provide an conducive environment for consumption, such as high temperature and an oxidizing atmosphere. [Pg.315]

Easy start-up and shutdown Good tolerance for fuel input particle size range High ash fuels can be accepted In-bed catalysts can be applied (tar cracking/gas upgrading) Thermodynamic losses limited Experience with biomass processing Carbon loss with ash... [Pg.205]

Easy start-up and shutdown Moderate carbon loss with ash... [Pg.205]

SCE with carbon dioxide removes organic contaminants and leaves much of the original soil organic matrix in place. The contaminants are then collected on activated carbon in a contaminant collection vessel and transported in an aqueous stream to the WAO reactor for destruction. The concentration of the organic contaminants on activated carbon in water provides a suitable matrix for the WAO feed stream and allows for a smaller reactor size. The activated carbon is then regenerated in the WAO reactor with minimal carbon loss and can be recycled to the contaminant collection vessel. [Pg.698]

Spent carbon thermal reactivation involves the removal of the adsorbed contaminants from the spent activated carbon and their destruction at a high temperature (typically in excess of 800°C). Carbon losses during reactivation processes can be held at 3-15% (Zanitsch, 1997 Faust, 1987). [Pg.347]


See other pages where Carbon loss is mentioned: [Pg.144]    [Pg.532]    [Pg.1553]    [Pg.2386]    [Pg.416]    [Pg.975]    [Pg.71]    [Pg.207]    [Pg.51]    [Pg.58]    [Pg.75]    [Pg.117]    [Pg.301]    [Pg.351]    [Pg.375]    [Pg.378]    [Pg.131]    [Pg.88]    [Pg.64]    [Pg.437]    [Pg.87]    [Pg.100]    [Pg.110]    [Pg.126]    [Pg.202]    [Pg.448]    [Pg.29]    [Pg.748]    [Pg.79]    [Pg.53]    [Pg.29]    [Pg.532]    [Pg.619]    [Pg.144]    [Pg.314]   
See also in sourсe #XX -- [ Pg.90 ]




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Carbon dioxide loss

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Carbon loss during conversion

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Carbon loss, from tropical forests

Carbon losses from soils

Carbon weight loss

Loss of carbon support

Managing Carbon Losses for Selective Oxidation Catalysis

Mass spectrometry carbon monoxide, loss

Soil Reduction Capacity Effects on Carbon Assimilation and Radial Oxygen Loss

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