Experimental program for the development of peat gasification. Task 2. Hydrogasification. Task 3. Fluidized-bed tests. Interim report No. 7, October 1, 1978-July 31, 1979

Technical Report · Fri Feb 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5496588· OSTI ID:5496588

Thirty tests were conducted in an entrained-flow hydrogasification process development unit (PDU) with Minnesota, North Carolina, and Maine peats to determine the effects of temperature, hydrogen partial pressure, residence time, and particle size on the product distribution and yields. These tests were conducted at temperatures of about 1000/sup 0/ to 1500/sup 0/F, hydrogen partial pressures of 0 to 250 psia, residence times of 2 to 30 seconds, and particle sizes of -10 + 100, -10 + 20, and -60 + 120 mesh. The results show that overall carbon conversion and hydrocarbon gas yield for the Minnesota peat are about 20% and 50% higher than those for North Carolina and Maine peats, respectively. The liquid fuel yields from all three peats are similar. Seventeen gasification tests were conducted in a 6-inch-diameter fluidized-bed reactor with steam and oxygen. These tests were conducted with raw peat as well as with chars of the peats from Minnesota, North Carolina, and Maine. The objectives of these tests were to determine the effects of temperature, pressure, and steam/feed carbon mole ratios on the gasification characteristics of peats and peat chars. The tests were conducted at pressures, temperatures, steam/feed carbon mole ratios, and fluidization velocities in the ranges of 123 to 544 psia, 1600/sup 0/ to 1850/sup 0/F, 0.7 to 2.6, and 0.4 to 1.0 ft/s, respectively. Carbon conversions as high as 96% were achieved. Tests were also conducted to determine the effect of temperature and fluidization velocity on the sintering characteristics of peat chars. All the data from hydrogasification PDU tests and char gasification PDU tests have been correlated. The unified kinetic description of the three peats is presented.

• Research Organization: Institute of Gas Technology, Chicago, IL (United States)
• DOE Contract Number: EX-76-C-01-2469
• OSTI ID: 5496588
• Report Number(s): FE-2469-48
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
GASIFICATION
PEAT
HYDROGENATION
COAL GASIFICATION
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FLUIDIZED BED
GRAPHS
MAINE
MINNESOTA
NORTH CAROLINA
PARAMETRIC ANALYSIS
PROCESS DEVELOPMENT UNITS
TABLES
YIELDS
CHEMICAL REACTIONS
DATA
DATA FORMS
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GREAT LAKES REGION
INFORMATION
NORTH AMERICA
NORTH ATLANTIC REGION
NUMERICAL DATA
PYROLYSIS PRODUCTS
SOUTHEAST REGION
THERMOCHEMICAL PROCESSES
USA
010404* - Coal
Lignite
& Peat- Gasification