Method of producing pyrolysis gases from carbon-containing materials

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:867101

Mudge, Lyle K ^[1]; Brown, Michael D ^[2]; Wilcox, Wayne A ^[3]; Baker, Eddie G ^[1]

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1. Richland, WA
2. West Richland, WA
3. Kennewick, WA

A gasification process of improved efficiency is disclosed. A dual bed reactor system is used in which carbon-containing feedstock materials are first treated in a gasification reactor to form pyrolysis gases. The pyrolysis gases are then directed into a catalytic reactor for the destruction of residual tars/oils in the gases. Temperatures are maintained within the catalytic reactor at a level sufficient to crack the tars/oils in the gases, while avoiding thermal breakdown of the catalysts. In order to minimize problems associated with the deposition of carbon-containing materials on the catalysts during cracking, a gaseous oxidizing agent preferably consisting of air, oxygen, steam, and/or mixtures thereof is introduced into the catalytic reactor at a high flow rate in a direction perpendicular to the longitudinal axis of the reactor. This oxidizes any carbon deposits on the catalysts, which would normally cause catalyst deactivation.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 4865625
• OSTI ID: 867101
• Country of Publication: United States
• Language: English

Related Subjects

method
producing
pyrolysis
gases
carbon-containing
materials
gasification
process
improved
efficiency
disclosed
dual
bed
reactor
feedstock
treated
form
directed
catalytic
destruction
residual
tars
oils
temperatures
maintained
level
sufficient
crack
avoiding
thermal
breakdown
catalysts
minimize
associated
deposition
cracking
gaseous
oxidizing
agent
preferably
consisting
air
oxygen
steam
mixtures
introduced
flow
rate
direction
perpendicular
longitudinal
axis
oxidizes
carbon
deposits
normally
catalyst
deactivation
pyrolysis gas
gasification reactor
direction perpendicular
level sufficient
carbon deposits
improved efficiency
bed reactor
flow rate
longitudinal axis
gasification process
oxidizing agent
catalytic reactor
carbon-containing material
pyrolysis gases
containing material
catalyst deactivation
gaseous oxidizing
feedstock materials
oxidizing agen
containing materials
/48/252/