Properties of char produced by rapid pressurized pyrolysis of peat

Journal Article · Tue May 01 00:00:00 EDT 1990 · Industrial and Engineering Chemistry Research; (USA)

DOI:https://doi.org/10.1021/ie00101a026· OSTI ID:6855429

Sjostrom, K; Guanxing, C ^[1]

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1. Royal Inst. of Tech., Stockholm (Sweden). Dept. of Chemical Technology

Steam reaction with char is the rate-limiting step gasification. The properties of the char are crucially dependent on the reactions during char formation. Pressurized pyrolysis makes it possible to influence the time/temperature history of the char as well as the gas environment. This investigation indicates that the pyrolysis of peat proceeds in two steps: an initial fast tar-producing step, followed by a second slower step including some chemical rearrangement of the char. A further observation is that a second contact between tar and char reduces the rate of the steam-char reaction. The tar probably encapsulates the ash, thus inhibiting the catalytic effect of the ash.

• OSTI ID: 6855429
• Journal Information: Industrial and Engineering Chemistry Research; (USA), Journal Name: Industrial and Engineering Chemistry Research; (USA) Vol. 29:5; ISSN 0888-5885; ISSN IECRE
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
CHARS
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
COAL GASIFICATION
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
ORGANIC COMPOUNDS
ORGANIC MATTER
OTHER ORGANIC COMPOUNDS
PEAT
PYROLYSIS
PYROLYSIS PRODUCTS
TAR
THERMOCHEMICAL PROCESSES