Expansion of high-temperature, high-pressure data set for coal gasification. Third quarterly report, March 28-June 28, 1985

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6231568

Solomon, P R; Serio, M A; Hamblen, D G; Heninger, S G

During the third quarter, procurement of parts for the pressurized (60 psig) version of the tube reactor (with optical access) was begun. Components for a higher pressure version (300 psig) of the tube reactor (without optical access) for use in long residence time pyrolysis and gasification experiments were also ordered. A total of 22 of the runs outlined in the test plan for the high pressure reactor using Montana Rosebud 200 x 270 mesh coal were done during the third quarter, along with a total of 6 runs with the 100 x 140 mesh. These were all pyrolysis runs and included excursions in temperature, pressure, heating rate (by varying the amount of cold gas introduced with the coal), and residence time. Comparisons of the data were made with predictions of the AFR Functional Group (FG) model. Agreement was fairly good, except at higher temperatures where the yields of hydrocarbons and oxygenated species were in conflict with the model. Improvements in the description of gas phase cracking and addition of submodels for gas-solid reactions and other gas phase chemistry are planned. Experiments were done in the heated tube reactor at 650 and 950/sup 0/C, which nearly completed the atmospheric pressure set. Comparison was also made with predictions of the FG model and good agreement was found except for the ethylene yield at high temperature. Some preliminary measurements of char reactivity and active site area were completed for chars produced in the HPR. Based on a limited amount of data, char reactivity appeared to increase with decreased temperature and increased particle size, pressure, and heating rate. However, a variation of active site area with heating rate was not found. A preliminary analysis was made of the data and correlations from the METC AGC facility. An explanation was offered for the decrease in gas yield with increasing residence time at temperatures below 2000/sup 0/F. 5 refs., 7 figs., 1 tab.

• Research Organization: Advanced Fuel Research, Inc., East Hartford, CT (USA)
• DOE Contract Number: AC21-84MC21004
• OSTI ID: 6231568
• Report Number(s): DOE/MC/21004-T1; ON: DE86000730
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010406 -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
ATMOSPHERIC PRESSURE
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COMPARATIVE EVALUATIONS
DATA
DECOMPOSITION
ENERGY SOURCES
ENTRAINMENT
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GASIFICATION
HEATING RATE
HIGH TEMPERATURE
INFORMATION
KINETICS
MATERIALS
MEDIUM PRESSURE
NUMERICAL DATA
PARTICLE SIZE
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
RESEARCH PROGRAMS
SIZE
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
VERY HIGH TEMPERATURE
YIELDS