Cyclic char gasifier oxidation process. [Alternate compression and evacuation of gasifier]

Patent · Tue Feb 04 04:00:00 EST 1986

OSTI ID:5931983

Firey, J C

This patent describes a process for gasifying at least two char fuel masses within separate containers. The process consists of: preheating each of the at least two char fuel masses to that temperature at which the char reacts rapidly with oxygen in adjacent compressed reactant gases; compressing at least one reactant gas into the pores of at least one of the char fuel masses; concurrently expanding reacted gases out of the pores of at least one other of the char fuel masses; alternating the compression process with the expansion process for each char fuel mass, with but one of the compression or expansion processes being applied to any one char fuel mass at any one time; repeating the compression process alternated with the expansion process several times; continuing the compression process continuously to at least one char fuel mass at a time; continuing the expansion process continuously to at least one char fuel mass at a time; removing substantially all reacted gases as product gases, which have expanded outside the pores, from continued contact with the char fuel, during each expansion on each char fuel mass; supplying at least one fresh reactant gas for each compression on each char fuel mass, the reactant gases comprising a gas containing appreciable oxygen gas.

• Assignee: NOV; EDB-86-075970
• Patent Number(s): US 4568361
• OSTI ID: 5931983
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL GASIFICATION
COMPRESSED GASES
COMPRESSION
CONTAINERS
ELEMENTS
EXPANSION
FLUIDS
GASES
GASIFICATION
HEATING
MATERIALS
NONMETALS
OXIDATION
OXYGEN
POROUS MATERIALS
PULSE TECHNIQUES
PYROLYSIS PRODUCTS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES