Steam stripping of fixed-bed gasification wastewaters
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Steam stripping of fixed-bed gasification wastewaters

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Published by U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory in Research Triangle Park, NC .
Written in English

Subjects:

  • Strippers (Chemical technology),
  • Coal gasification -- United States -- Waste disposal.,
  • Packed towers.,
  • Hydrogen-ion concentration.

Book details:

Edition Notes

Statementby F.D. Skinner, B.J. Hayes.
ContributionsHayes, Barbara J., Air and Energy Engineering Research Laboratory.
The Physical Object
Pagination3 p. ;
ID Numbers
Open LibraryOL22442933M

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@article{osti_, title = {Gasifier wastewater treatment: Phase I cooling tower assessment}, author = {Mann, M D and Willson, W G and Hendrikson, J G and Winton, S L}, abstractNote = {The principle goal of the gasification research at UNDERC is to develop environmental data on the treatability of wastewaters from the fixed-bed gasification of lignite. Steam stripping of fixed-bed gasification wastewaters [] Skinner, F. Douglas. Research Triangle Park, NC: U.S. Environmental Protection Agency, Air and .   Gasification of biomass is an attractive technology for combined heat and power production as well as for synthesis processes such as production of liquid and gaseous biofuels. Dual fluidised bed (DFB) technology offers the advantage of a nearly nitrogen-free product gas mainly consisting of H2, CO, CO2 and CH4. The DFB steam gasification process has been developed at Cited by: Lurgi FBDB™ - Fixed Bed Dry Bottom Gasification Gasifying solid carbonaceous feedstock With Lurgi FBDB™ - Fixed Bed Dry Bottom Gasification, syngas (composed of hydrogen and carbon monoxide) can be generated from solid carbonaceous feedstock (e.g. .

C. Acid–Base Chemistry of Coal Gasification Wastewaters Table VII shows that alkalinity values in Hygas and Synthane wastewaters are noticeably higher than in coke plant ammonia liquor. This results from the presence of relatively high partial pressures of ammonia and Cited by: 2. The reaction gas (raw gas) is mainly comprised of CO and H 2, but also contains about % CO2, % CH 4, and % soot depending on the feedstock quality. The CO to H 2 ratio depends on the. The gasification system was originally designed for the thermal conversion of biomass aiming at the generation of high quality product gas. Steam is used as the fluidization and gasification agent in the gasification reactor of the DFB system and, therefore, the product gas has a high hydrogen content (>40%) and a moderate lower calorific value of 12–14 MJ/N m 3, when wood is by: • A hydrogen source is needed for regeneration. • Stripper requires steam, i.e., high energy inputs. • The steam used in regeneration results in an acidic wastewater stream. (In the pilot plant, the steam is vented to the stack with the regeneration off-gas.) D

  We discuss an equilibrium model of a fixed-bed solid fuel gasification process that takes into account macrokinetic constraints imposed on the rates of heterophase processes and allows the pyrolysis and gasification processes to be described in a fairly simple manner with the use of thermal analysis data. The results of calculations are compared with the measured parameters characterizing Cited by: 7. Sulfide removal from wastewater by steam stripping is not commonly practiced in the coke oven industry. Phenols are being removed by solvent extraction, steam stripping and/or biological oxidation, and carbon adsorption. Biological treatment has been successful with coke oven wastewaters in meeting existing phenol regulatory limitation. A dual loop gasification system [17, 18], which has a gasifier for steam gasification and a combustor for residual char combustion, appears to be attractive to sustain the gasification process. gasification is predestined for decentralized energy systems. Fixed bed gasification is predominantly in this lower power range, since fluidised bed or entrained flow gasification usually demand for higher plant size for economic fea-sibility. In the last years especially staged fixed-bed gasification technologies have made decisive Size: 3MB.