Feedstock effects in coal flash pyrolysis

• Published in: Industrial & engineering chemistry research Vol. 29; no. 10; pp. 2154 - 2159
• Main Authors: Tatterson, David F, Robinson, Ken K, Guercio, Rick, Marker, Terry L
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.10.1990
• Subjects: 01 COAL, LIGNITE, AND PEAT; 010405 - Coal, Lignite, & Peat- Hydrogenation & Liquefaction; 010409 - Coal, Lignite, & Peat- Pyrolysis & Carbonization- (1987-); 010500 - Coal, Lignite, & Peat- Products & By-Products; 010600 - Coal, Lignite, & Peat- Properties & Composition; Applied sciences; AROMATICS; BITUMINOUS COAL; BLACK COAL; BROWN COAL; CARBONACEOUS MATERIALS; CHEMICAL COMPOSITION; CHEMICAL FEEDSTOCKS; CHEMICAL REACTIONS; COAL; COAL GASIFICATION; COAL LIQUEFACTION; COAL LIQUIDS; COAL RANK; CONVERSION; DECOMPOSITION; DEVELOPED COUNTRIES; Energy; ENERGY CONVERSION; ENERGY SOURCES; Exact sciences and technology; FEDERAL REGION VIII; FLASH HYDROPYROLYSIS PROCESS; FLUIDS; FOSSIL FUELS; FUEL GAS; Fuel processing. Carbochemistry and petrochemistry; FUELS; GAS FUELS; GASES; GASIFICATION; ILLINOIS; INTERMEDIATE BTU GAS; LIGNITE; LIQUEFACTION; LIQUIDS; MATERIALS; MATTER; MINNESOTA; MONTANA; NORTH AMERICA; ORGANIC COMPOUNDS; ORGANIC MATTER; PEAT; PRODUCTIVITY; PYROLYSIS; Solid fuel processing (coal, coke, brown coal, peat, wood, etc.); THERMOCHEMICAL PROCESSES; USA; Performance evaluation; Coal liquids; Conversion rate; Coal; Flash pyrolysis; Coalification degree; Coal rank
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/ie00106a030

In this paper the impact of lower rank coals on yields and product qualities is examined in a large- scale flash pyrolysis reactor capable of achieving heating rates of 10{sup 6}{degrees}C/s and reactor times of 10 ms. A Montana lignite and a Minnesota peat were pyrolyzed and the results compared to those for Illinois No. 6 bituminous coal. The peat was found to be more reactive than the Illinois No. 6 coal and the lignite less reactive. Relatively high liquid yields were also obtained from the peat. This result demonstrates that high oxygen content in a feedstock does not necessarily correlate with low production of liquids. At high reactor severity, the peat is an excellent source of aromatics (benzene, toulene, and xylenes) and medium Btu gas, which could be converted to other chemical feedstocks.