Coal gasification reactions with on-line in-situ FT-IR analysis. Twelfth quarterly report, June 3-September 3, 1984

Technical Report · Thu Oct 18 04:00:00 EDT 1984

OSTI ID:5314644

Solomon, P R; Serio, M A; Hamblen, D G; Best, P E; Markham, J R

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
• 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)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
BROWN COAL
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
COAL TAR
CONSTRUCTION
DATA
DECOMPOSITION
ENERGY SOURCES
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HEAT TRANSFER
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
KINETICS
LIGNITE
MATERIAL BALANCE
MATERIALS
NUMERICAL DATA
ON-LINE MEASUREMENT SYSTEMS
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
RESEARCH PROGRAMS
SIZE
SPECTRA
SULFUR CONTENT
TAR
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES
VELOCITY
VERY HIGH TEMPERATURE
WATER
YIELDS