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Friday, July 31, 2020 | History

2 edition of Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal found in the catalog.

Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal

M. J Purdy

Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal

by M. J Purdy

  • 69 Want to read
  • 21 Currently reading

Published by U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory, Center for Environmental Research Information [distributor] in Research Triangle Park, NC, Cincinnati, OH .
Written in English

    Subjects:
  • Coal gasification -- United States,
  • Lignite,
  • Peat,
  • Fluidization

  • Edition Notes

    StatementM.J. Purdy, R.M. Felder, and J.K. Ferrell
    ContributionsFelder, R. M, Ferrell, J. K., Industrial Environmental Research Laboratory (Research Triangle Park, N.C.)
    The Physical Object
    Pagination5 p. :
    ID Numbers
    Open LibraryOL17968046M

    § Air-pollution and contamination of coal and bio mass fired fluidized bed combustors. Keywords: Fluidized bed, combustion, wastes, risk, hazards INTRODUCTION The paper tries to define the well known and the potential risk-related spots of the FBC technology from the positions of the modern Safety-Related Engineering Approach in process Size: 69KB. Fluidized Bed Technology: Principles and Applications presents the essential facts about beds of solid particles when fluidized by gases, and explains how the technology has been applied to yield fluidized bed boilers, furnaces, heat recovery systems and process plants. The text is accompanied by worked examples, using elementary mathematics Cited by:

    This study was made to investigate a process in which the gasification of coal and the reduction of iron ore took place simultaneously in a reactor. Fluidized bed was selected for the type of reactor from preliminary study on reduction time at ° by: 3. The solid waste produced from urban area is an urgent issue to be addressed. A fluidized bed (FB) gasification technology has been widely applied and proven effective to convert waste into clean energy and environmentally friendly. Co-gasification is a technique of mixing two or more fuels that aims to improve calorific value of the gas : I. Nyoman Suprapta Winaya, Rukmi Sari Hartati, I. Putu Lokantara, I. Gan Subawa, I. Made Agus Putraw.

    Environmental Review of Synthetic Fuels March TABLE 2. PNA HYDROCARBONS IN COAL GASIFICATIONb TAR Test Run Production Factor (g/gC) illinois Montana Wyoming Western Kentucky North Dakota Compound No. 6 Rosebud Smith-Roland No. 9 Zap Lignite Naphthalene 37 Benzothiophene 30 12 48 5 C i & Ci—naphthaienes . A Review of Thermal Co-Conversion of Coal and Biomass/Waste. also conducted co-liquefaction of PE and mixed plastic waste with a bituminous coal, a subbituminous coal and lignite in a tubing bomb reactor. Co-liquefaction of mixed waste plastics with a bituminous coal exhibited higher oil yields than obtained by liquefaction of either the Cited by:


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Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal by M. J Purdy Download PDF EPUB FB2

Get this from a library. Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal. [M J Purdy; R M Felder; J K Ferrell; Industrial Environmental Research Laboratory (Research Triangle Park, N.C.)]. Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal by M.

J Purdy,U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory, Center for Environmental Research Information [distributor] edition, in English.

Zand et al. [2 ] measured the fuel nitrogen conversions into different prod- ucts in fluidized-bed steam-oxygen gasification of peat, lignite and subbitu- minous coal at MPa pressure and at temperatures of C.

Approx- imately 60 wt% of the fuel nitrogen of all these fuels was converted into ammonia, and the gasification conditions Cited by: Coal gasification means to produce coal gas.

It is a syngas or a mixture of carbon monoxide carbon dioxide, hydrogen, and water vapor. This can then be converted into automobile gas.

Purdy has written: 'Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal' -- subject(s): Peat, Coal gasification, Fluidization, Lignite Load More. Bituminous And Subbituminous Coal Combustion General Coal is a complex combination of Fluidized-bed gasification of peat matter and inorganic mineral matter formed over eons from successive layers of fallen vegetation.

Coals are classified by rank according to their progressive alteration in the natural metamorphosis from lignite to anthracite. Wyoming sub-bituminous coal (WYC) and Texas Lignite coal (TXL) are used as standard fuels for comparison purposes in modeling studies.

Two main parameters are investigated in this study. Fluidized subbituminous air gasification of Finnish peat, sawdust and German brown coal were studied in a small pressurized fluidized-bed pilot plant operated at – MPa. The effects of air-to-fuel-ratio and other gasification variables on the conversion efficiencies and product yields are discussed in Cited by: Felder, Richard M.

Fluidized-bed gasification of peat, lignite, subbituminous, and pretreated bituminous coal by M. J Purdy (Book) 3 editions published A mathematical model for a fluidized-bed coal gasifier by M. J Purdy. Lignite, which has very high moisture content, produces raw gas at a temperature of around °F.

Lower moisture bituminous coal produces gas temperatures of over °F. Typically, the product gas leaving the gasifier is quenched by direct contact with recycle water to condense and remove tars and oils.

Gasification experiments covering a wide range of temperatures ( to /sup 0/C) and pressures (0 to psig) were conducted at high heating rate ( to /sup 0/C/sec) for the chars of three American coals, viz., an N.D.

lignite, a Washington subbituminous coal and an N.M. bituminous coal, using a unique high temperature/pressure. Bituminous And Subbituminous Coal Combustion General Coal is a complex combination of organic matter and inorganic mineral matter formed over eons from successive layers of fallen vegetation.

Coals are classified by rank according to their progressive alteration in the natural metamorphosis from lignite to anthracite. Coal rank depends onFile Size: KB.

Coal Gasification Characteristic in a Pressurized Fluidized Bed Article in Energy & Fuels 17(6) September with 49 Reads How we measure 'reads'. Fluidized-bed gasifiers suspend feedstock particles in an oxygen-rich gas so the resulting bed within the gasifier acts as a fluid.

These gasifiers employ back-mixing, and efficiently mix feed coal particles with coal particles already undergoing gasification. To sustain fluidization, or suspension of coal particles within the gasifier, coal of. @article{osti_, title = {Coal and char transformation in hydrogasification of coals ranging in rank from lignite to low-volatile bituminous}, author = {Mason, D M}, abstractNote = {The effect of rank on the behavior of coal at different stages in the hydrogasification process was investigated petrographically.

Among five high-volatile bituminous coals tested, the yield of. FLUIDIZED BED COMBUSTION Fluidized bed combustion (FBC) is a combustion technology used in power plants.

FBC plants are more flexible than conventional plants in that they can be fired on coal and biomass, among other fuels. gasification are reported in the literature, although this approach would make possible the steam gasification with the inherent water of the fuel.

The present paper reports on the setup of a pilot-scale fluidized bed facility for the gasification of coal/biomass slurries as well as on the procedure for slurry preparation. The fixed bed gasification system consists of a reactor/gasifier with a gas cooling and cleaning system.

The fixed bed gasifier has a bed of solid fuel particles through which the gasifying media and gas move either up or down.

Keywords: fluidized-bed gasification, high-ash coal, oxygen enrichment, modelling Abstract—The gasification of two high-ash South African coals were studied using a pilot- scale bubbling fluidized-bed coal gasifier operated at atmospheric pressure with oxygen enriched air and steam as the gasification agents.

Tests were carried out at File Size: KB. Use of these modified enzymes in a small fluidized-bed reactor (with H2 sparge) resulted in >40% conversion of bituminous coal in 24 h.

Research using model compounds suggests that the conversion process may be in part owing to splitting at methyl or ethyl bridges, and perhaps saturation of ring by: 4.

Boiler design review and study for future change in coal quality, 6x MWel, Bituminous Coal, Tutuka PS, South Africa Eskom Enterprises, Johannesburg, South Africa Modernization of fi ring system and extension of coal range, installa-tion of Low-NO X burners, MWel, Bituminous Coal, Herne PS Unit 4, Germany STEAG GmbH, Essen, Germany.COAL, OIL SHALE, NATURAL BITUMEN, HEAVY OIL AND PEAT – Vol.

I - Coal, Oil Shale, Natural Bitumen, Heavy Oil, and Peat - Jinsheng Gao ©Encyclopedia of Life Support Systems (EOLSS) oil in their elemental composition of organic matter than they are to coal.

Naturally, it is much easier to convert them into liquid fuels. The combustion characteristics of a mixture of anthracite and bituminous coal were studied in a m i.d.

fluidized bed combustor (FBC). The properties of the pressure fluctuation for the bed such as the standard deviation, cross-correlation function, dominant frequency and the power spectral density function were obtained through statistical by: 5.