Coal gasification reactions with on-line in-situ FT-IR analysis. Twelfth quarterly report, June 3-September 3, 1984
During the twelfth quarter, the main thrust was determination of coal pyrolysis kinetics in the heated tube reactor. This involved measurement of particle temperature using FT-IR transmission and emission spectroscopy, residence time determinations with photodiodes, material balances, and FT-IR analysis of chars. The particle temperatures determined by FT-IR were generally close to those estimated from a knowledge of the gas temperature. The residence time determinations indicated that the particle velocity was between 80 and 100% of the average gas velocity, depending on size and the gas flow rate. Material balances done in the newer Inconel 702 tube agreed very well with those done previously in a stainless steel tube. The FT-IR char analyses were also consistent with previous results and the aliphatic region followed the trends of product yields quite closely. It was found that primary pyrolysis, measured by the initial rapid weight loss and the loss of aliphatic material, occurs between 50 cm and 115 cm for an equilibrium tube temperature of 800/sup 0/C and a cold gas velocity of approx.28 meters/second. The transit time over this distance is about 14 msec. while the particle temperature is increasing from 650 to 780/sup 0/C. The results suggest that k is at least 100 s/sup -1/ at 800/sup 0/C for the rate of evolution of tar and hydrocarbons which dominate primary pyrolysis and weight loss. Construction was nearly completed on the high pressure reactor system. A plan was formulated for the initial test phase. In addition, preliminary sulfur measurements were made on chars from entrained flow reactor system. 13 refs., 22 figs., 1 tab.
- Research Organization:
- Advanced Fuel Research, Inc., East Hartford, CT (USA)
- DOE Contract Number:
- AC21-81FE05122
- OSTI ID:
- 5314644
- Report Number(s):
- DOE/FE/05122-2116; ON: DE86014843
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal gasification reactions with on-line in-situ FT-IR analysis. Fifteenth quarterly report, March 3-June 3, 1985
Coal gasification reactions with on-line in-situ FT-IR analysis. Tenth quarterly report, December 3, 1983-March 3, 1984
Related Subjects
CHARS
CHEMICAL REACTION YIELD
INFRARED SPECTRA
PARTICLE SIZE
SULFUR CONTENT
TEMPERATURE MEASUREMENT
CHEMICAL REACTORS
CONSTRUCTION
COAL GASIFICATION
CHEMICAL REACTION KINETICS
ON-LINE MEASUREMENT SYSTEMS
COAL TAR
FUEL GAS
LIGNITE
PYROLYSIS
WATER
EXPERIMENTAL DATA
HEAT TRANSFER
MATERIAL BALANCE
RESEARCH PROGRAMS
VELOCITY
VERY HIGH TEMPERATURE
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
DATA
DECOMPOSITION
ENERGY SOURCES
ENERGY TRANSFER
FLUIDS
FOSSIL FUELS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
MATERIALS
NUMERICAL DATA
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
SIZE
SPECTRA
TAR
THERMOCHEMICAL PROCESSES
YIELDS
010404* - Coal
Lignite
& Peat- Gasification
010406 - Coal & Coal Products- Pyrolysis & Cracking- (-1987)
010600 - Coal
Lignite
& Peat- Properties & Composition