Author: C. MenschelPublisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Process for the Chemical Partial Regeneration of Granular Activated Charcoal
Author: C. MenschelChemical Regeneration of Spent Granular Activated Carbon
Author: Sumon KanpiromPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 478
Book Description
Chemical Regeneration of Granular Activated Carbon
Author: Amanda LarasatiOptimization of the Regeneration Procedure for Granular Activated Carbon
Author: Mine Safety Appliances Research CorporationPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 134
Book Description
Laboratory scale experiments were conducted on the regeneration of activated carbons spent in tertiary treatment of wastewater. Wet spent carbon being regenerated thermally undergoes three regeneration stages: drying at about 220°F; Pyrolysis of the adsorbed pollutants at 500 to 1550°F; and Activation with flue gas and steam at 1600 to 1700°F. Data indicated that alkaline and iron oxide ash accumulation catalyze the oxidation of carbon pores. Leaching with HCl was found to remove the metallic elements and allow regeneration to proceed with less destruction of the carbon. Other observations are discussed.
Two-stage Granular Activated Carbon Treatment
Author: Leon S. DirectoPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 80
Book Description
The regeneration of granular activated carbon using hydrothermal technology
Author: Michael David SufnarskiPublisher:
ISBN:
Category :
Languages : en
Pages : 184
Book Description
Study of Bench Scale Chemical Regeneration of Granular Activated Carbon (GAC) Contaminated with Pesticides
Author: Sumita ThakurPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 292
Book Description
Optimization of the Regeneration Procedure for Granular Activated Carbon
Author: Mine Safety Appliances Research CorporationPublisher:
ISBN:
Category : Carbon, Activated
Languages : en
Pages : 115
Book Description
Carbon Materials for Catalysis
Author: Philippe SerpPublisher: John Wiley & Sons
ISBN: 0470403691
Category : Science
Languages : en
Pages : 603
Book Description
This is the first comprehensive book covering all aspects of the use of carbonaceous materials in heterogeneous catalysis. It covers the preparation and characterization of carbon supports and carbon-supported catalysts; carbon surface chemistry in catalysis; the description of catalytic, photo-catalytic, or electro-catalytic reactions, including the development of new carbon materials such as carbon xerogels, aerogels, or carbon nanotubes; and new carbon-based materials in catalytic or adsorption processes. This is a premier reference for carbon, inorganic, and physical chemists, materials scientists and engineers, chemical engineers, and others.
In-Situ Regeneration of Granular Activated Carbon (GAC) Using Fenton's Reagents
Author: Carla De Las CasasPublisher:
ISBN:
Category :
Languages : en
Pages : 430
Book Description
Fenton-dependent recovery of carbon initially saturated with one of several chlorinated aliphatic contaminants was studied in batch and continuous-flow reactors. A specialty carbon, URV-MOD 1 (Calgon) was employed to minimize non-productive H2O2 demand - that which does not yield hydroxyl or superoxide radicals. Enhancement of PCE degradation kinetics by ferric iron addition is limited by iron solubility, even at relatively low pH. Quinone addition increased the pseudo-first-order rate constant for PCE loss temporarily. Only copper addition sustainably enhanced the specific rate of PCE loss. For copper-to-iron molar ratios of 0.25 to 5, the pseudo-first-order rate constant for PCE transformation was increased by a factor of 3.5. It is apparent that the effect of copper addition on Fenton-dependent reaction rates is complex, and involves a shift in chemical mechanism, as indicated by the differing slopes in the Arrhenius plot (with and without copper).A mathematical model was developed to evaluate the effect of operational parameters ([Fe(III)]T:[H2O2]o ratio and pH) on degradation kinetics and optimize the PCE degradation process in homogeneous reaction mixtures. The model simulated experimental degradation of the organic target in a homogeneous Fenton-reaction system. The model requires further refinement to simulate Fenton's systems in which ions in solution (such as sulfate and chloride) play significant roles. In continuous-flow reactors, Fenton's reagents were cycled through spent GAC in columns to degrade one of seven chlorinated compounds tested. The contaminant with the weakest adsorption characteristics, methylene chloride, was 99% lost from the carbon surface during a 14-hour regeneration period. At the field site, the GAC was saturated with gases containing TCE and PCE from a soil vapor extraction (SVE) system. In the field, up to 95% of the sorbed TCE was removed from GAC during regeneration periods of 50-60 hours. Recovery of PCE-loaded GAC was significantly slower. Column experiments show that there is minimal loss of carbon adsorption capacity during Fenton treatment and that the rate of GAC regeneration is compound specific. Scoping-level cost estimates indicated that field use of Fenton regeneration is not cost effective without optimization and/or iron surface amendments, except in the case of the most soluble VOCs.