Experimental program for the development of peat gasification. Interim report No. 6: hydrogasification and fluidized-bed tests as of September 30, 1978

Technical Report · Thu Mar 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/6086674· OSTI ID:6086674

The results of tests with the Minnesota peat and laboratory-scale tests with North Carolina and Maine peats are presented. Thirty-five tests were conducted in the hydrogasification PDU with Minnesota reed sedge peat to determine the effects of temperature, hydrogen partial pressure, residence time, and the presence of carbon oxides (in synthesis gas) on the product distribution and yields. The tests were conducted at coil temperatures of 800/sup 0/ to 1550/sup 0/F, hydrogen partial pressures of 0 to 535 psia, and residence times of 3 to 22 seconds. The peat flow rates were as high as 250 times those in the laboratory-scale tests. The results agree reasonably well with the laboratory-scale data. Eighteen gasification tests were conducted in a 6-inch-diameter fluidized-bed reactor with steam and oxygen. Both Minnesota peat char and raw peat were gasified. The objectives were to determine the effects of temperature, pressure, and steam/feed carbon mole ratio on the gasification characteristics of peat and peat char. The tests were conducted at pressures of 350 to 535 psia, average bed temperatures of 1700/sup 0/ to 1900/sup 0/F, steam/feed carbon mole ratios of 0.7 to 3.9, and fluidization velocities of 0.4 to 1.0 ft/s. Carbon conversions as high as 98% were achieved. The effects of temperature and fluidization velocity on the sintering characteristics of peat were also determined. Twenty-three tests were conducted in the thermobalance with chars of peats from North Carolina and Maine at various pressures and temperatures and with steam/hydrogen mixtures and synthesis gas to determine gasification characteristics of these peats and to develop kinetic models similar to those developed for Minnesota peat.The gasification characteristics of these peats are quite similar to those of Minnesota peat. (LTN)

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• OSTI ID: 6086674
• Report Number(s): FE-2469-35
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
09 BIOMASS FUELS
090122 -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
BENCH-SCALE EXPERIMENTS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHARS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL GASIFICATION
CORRELATIONS
CRYOGENIC FLUIDS
DATA
DATA FORMS
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASIFICATION
GRAVIMETRIC ANALYSIS
HYDROGEN
HYDROGENATION
INFORMATION
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PEAT
PRESSURE DEPENDENCE
PROCESS DEVELOPMENT UNITS
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
STEAM
TABLES
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES