Carbonate regeneration

New areas in adsorption technology include carbonaceous and polymeric resins (3). Based on synthetic organic polymer materials, these resins may find special uses where compound selectivity is important, low effluent concentrations are required, carbon regeneration is impractical, or the waste to be treated contains high levels of inorganic dissolved soHds. 

On-stream cycle time of carbon (i.e., the time between carbon regenerations)... 

The Subpart O standards apply to units that treat or destroy hazardous waste and which meet the definition of an incinerator. An incinerator is any enclosed device that uses controlled flame combustion and does not meet the criteria for classification as a boiler, sludge dryer, carbon regeneration unit, or industrial furnace. Typical incinerators1 2 3 include rotary kilns, liquid injectors, fixed hearth units, and fluidized bed incinerators (Table 23.1). The definition of an incinerator also includes units that meet the definition of an infrared incinerator or plasma arc incinerator. An infrared incinerator is any enclosed device that uses electric-powered resistance as a source of heat and which is not listed as an industrial furnace. A plasma arc incinerator is any enclosed device that uses a high-intensity electrical discharge as a source of heat and which is not listed as an industrial furnace. 

Costs do not include sludge dewatering and disposal costs. b Existing carbon regeneration furnace on site. 

Figure 11 Carbon regeneration flow diagram. Exhausted carbon is sluiced from adsorbers, dewatered, and regenerated in a thermal furnace (multiple hearth, rotary kiln, infrared, or fluidized bed) the regenerated carbon is quenched and washed before returning to the adsorbers new carbon is washed and added to make up for the loss during regeneration (from Ref. 11).

The treatment cost for the same amount of pinkwater (explosive manufacturing wastewater) was 23,700 for conventional carbon regeneration as compared to 22,100 for the use of ECOCHOICE (D13609E, p. 3). 

MANAGEMENT OF SPENT MATERIALS 4.3.1 Activated carbon regeneration and reactivation... 

Supercritical fluid extraction (SFE) is a suitable process for many separation problems. The regeneration of the supercritical fluid is as important as the extraction step itself Therefore this paper presents a method to do this in a more isobaric way than the customary pressure reduction regeneration. For the example of soil remediation we have investigated the activated carbon regeneration of supercritical carbon dioxide loaded with the low-volatile polycyclic aromatic hydrocarbon (PAH) pyrene. Characteristics of supercritical fluid extraction for soil remediation are elevated temperatures and pressures up to 370 K and 300 bar. For this reason adsorption isotherms of pyrene on activated carbon up to these conditions are measured first. Subsequently this method is used to regenerate carbon dioxide in a closed solvent cycle plant with a 4 1 extractor. An economic analysis using these results indicate that the soil remediation costs will decrease for about 20 - 30 % by means of an activated carbon adsorber. 

In recent years, supercritical fluid extraction has received widespread attention for the removal of non- or low-volatile organic components from liquid and solid matrices. This process has many potential applications like analytical extractions, applications in the food and drug industry, activated carbon regeneration or soil remediation. 

SC C02 Temperature effect P=105 bars 3.4. Activated carbon regeneration... 

Many potential applications have been proposed which involve the desorption of solutes from matrix using SCF solvents at elevated pressure these include activated carbon regeneration [1,2,3,4,5] and soil remediation [6,7,8] using supercritical carbon dioxide. 

For control valves and other areas of high-turbulence (velocity 8 ft/s [2.5 m/s]) (I e, downstream of control valves, rich carbonate inlet of carbonate regenerator, reboiler tube sheet, and baffles), use type 304 SS plus i/32 in, (1 mm) CA Do not use miters long radius elbows are preferred. See piping specifications for other limitations on miters. 

X. T. Liu et al.. Simultaneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by microwave irradiation. Carbon, 42, 415-422 (2004). 

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